Shanghai Douwin Chemical Co.,Ltd

Nylon-66(2024年02月22日)

douwin-chem — 2024-02-22T15:16:19+0900

https://www.douwin-chem.com/adipic-acid-nylon-66.html

Polyhexadiohexylenediamine, commonly known as nylon-66, is a thermoplastic resin, commonly made from polycondensation of adipic acid and hexadiamine. Insoluble in general solvents, only soluble in resorcinol, etc.High mechanical strength and hardness, high rigidity. Can be used as engineering plastics, mechanical accessories such as gears, lubricated bearings, instead of non-ferrous metal materials for machine housing, automobile engine blades, etc., can also be used to make synthetic fiber.

Specifications of nylon-66

Nylon 66 has good comprehensive properties, such as high strength, good rigidity, impact resistance, oil resistance, chemical resistance, abrasion resistance and self-lubrication, especially better hardness, rigidity, heat resistance and creep performance, and easy access to raw materials, low cost, so it is widely used in industry, clothing, decoration, engineering plastics and other fields.

How is adipic acid nylon Applied to Nylon-66 ?

Nylon 66 is made up of adipic acid and hexamethylenediamine.

Nylon 66 is often used in products that require high mechanical strength, good heat stability or chemical resistance. It is used in textiles and carpet fibres and moulded parts, as well as airbag fibres.

Douwin, as an excellent adipic acid factory, offers a wide range of adipic acid for you to choose from.

Methyl Acrylate (MA/Methylacrylate）(2024年02月22日)

douwin-chem — 2024-02-22T15:15:51+0900

https://www.douwin-chem.com/products/methyl-acrylate-ma/

Methyl acrylate is a kind of organic compound, the molecular formula is C4H6O2, colorless transparent liquid, has a pungent smell. HS code for Methyl Acrylate is 2916121000. Slightly soluble in water, soluble in ethanol, ether, acetone, benzene.

Features of Methyl Acrylate (Methyl Acrylate MA)

1. Methyl acrylate does not polymerize when the temperature is lower than 10℃, while higher than 10℃ tends to polymerize. Light, heat, peroxide, and so on accelerate polymerization.

2. Methyl acrylate is moderately toxic and has strong irritating and corrosive effects on eyes, skin, and mucosa, and can be absorbed through the skin to cause poisoning.

3. Stability.

4. Banned substances: acids, bases, strong oxidants.

5. Conditions to avoid contact: exposure to heat and air.

6. Polymerization hazard: Polymerization.

Storage and Delivery of Methyl Acrylate (MA/Methylacrylate）

For the package, methyl acrylate is available in drum and isotank. The drum contains 180kg, and the container load for 20FCL is 14.4tons. The isotank contains 21MT.

Douwin Chemical is a professional chinese methyl acrylate ma supplier, we provide organic chemistry compounds, adipic acid sigma, butyl acylate, maleic anhydride, etc. Contact us to know methyl acrylate price or c4h6o2 structure .

Maleic Anhydride (MA/Maleic Acid Anhydride)(2024年02月22日)

douwin-chem — 2024-02-22T15:15:14+0900

https://www.douwin-chem.com/products/maleic-anhydride-ma/

Maleic anhydride china often abbreviated as MA, is an organic compound. It is a colorless crystal, strong stimulating smell, and easy to sublimate. HS code is 29171400. It is mainly obtained from the oxidation of n-butane or butene in benzene or carbon four fractions and is a raw material for the production of unsaturated polyester and organic synthesis.

Features of Maleic Anhydride MA

Maleic Anhydride should avoid contact with moist air, a strong oxidizer, strong reducing agent, strong acid, strong base, alkali metal, and water. The rhombic system is a colorless acicular or lamellar crystal. It dissolves in ethanol and produces esters. Soluble in ethanol, ether, and other organic solvents, difficult to dissolve in petroleum ether and carbon tetrachloride. Maleic Anhydride reacts with hot water to form maleic acid. It is easy to copolymerize olefins. Homopolymerization is also possible. Maleic Anhydride reacts with a diol to form linear unsaturated polyester and with sulfur trioxide to form sulfonated maleic anhydride.

Storage and Delivery of Maleic Anhydride (MA)

For the package, Maleic Anhydride is available in bag and container. The bag contains 25kg, and the container load for 20FCL is 20 tons with pallets and 25 tons without pallets.

Douwin Chemical is a professional maleic anhydride manufacturer , we provide organic chemistry compounds, adipic acid sigma, butyl acylate, mek methyl ethyl ketone, etc. Contact us to buy our products or know maleic anhydride iupac name .

Butyl Acrylate (BA)(2024年02月22日)

douwin-chem — 2024-02-22T15:14:12+0900

https://www.douwin-chem.com/products/butyl-acrylate-ba/

Butyl acrylate ba is a kind of colorless transparent liquid, insoluble in water, can be mixed in ethanol and ether. HS code for BA is 2916123000. Acrylates and their esters have been widely used in industry. They are used to make soft monomers of acrylate solvent and emulsion adhesives, which can be homopolymer, copolymerization and graft copolymerization, as well as high polymer monomers, used as intermediates in organic synthesis.

As one of the professional butyl acrylate producers and producers, Douwin has high-quality butyl acrylate for sale for more than 15 years. Douwin has its own butyl acrylate factory which can ensure the quality and quantity of hs code butyl acrylate produced. If you are looking for reliable butyl acrylate suppliers or need butyl acrylate wholesale, Douwin is your perfect choice. You can leave your information below and we will contact you as soon as possible.

Features of Butyl Acrylate (BA)

Butyl acrylate is a kind of colorless transparent liquid, insoluble in water, can be mixed in ethanol and ether. Acrylates and their esters have been widely used in industry. They are used to make soft monomers of acrylate solvent and emulsion adhesives, which can be homopolymer, copolymerization and graft copolymerization, as well as high polymer monomers, used as intermediates in organic synthesis. With the increase of temperature and the extension of storage time, the tendency of self-aggregation is intensified. Butyl acrylate should be avoided to exposure to light and heat. Due to the features of Butyl Acrylate, the butyl acrylate applications are wide. If you want to know more about the Butyl Acrylate applications and features, please feel free to contact Douwin, one of the most professional butyl acrylate suppliers and producers in China.

Storage and Delivery of Butyl Acrylate (BA)

For the package, Butyl Acrylate is available in drum and iso tank. The drum contains 180kg, and the iso tank contains 21MT.

There are many methyl ethyl ketone suppliers, but we are one of the best choices for you.

Adipic Acid (AA)(2024年02月22日)

douwin-chem — 2024-02-22T15:13:29+0900

https://www.douwin-chem.com/products/adipic-acid-aa/

Adipic acid china, also known as fatty acid, is an important organic diacid. Adipic acid structural formula is C6H10O4. HS code for Adipic Acid is 29171200. Widely used in applications of sole raw liquor, PU coating, TPU, nylon 66, plasticizer, adhesives, and so on. As one of the adipic acid supplier in China, Douwin has own adipic acid factory with advanced production facility, which can provide our clients with quality AA.
Features of Adipic Acid (AA)

Adipic acid is a general chemical. It's a white powder. It has the smell of burning bones. It is easily soluble in most organic solvents such as alcohol and ether.

Adipic Acid Properties
Adipic Acid Formula

Adipic Acid Storage and Delivery

For the package, AA is available in 25kg/bag, 500kg/bag and 1000kg/bag.

we provide organic chemistry compounds, adipic acid sigma, butyl acylate, mma methacrylate, etc. Contact us to buy our products or know structure and iupac name of adipic acid.

Acrylic Acid (AA)(2024年02月22日)

douwin-chem — 2024-02-22T15:12:24+0900

https://www.douwin-chem.com/products/acrylic-acid-aa/

Acrylic acid is an organic compound. Acrylic acid is the simplest unsaturated carboxylic acid, consisting of a vinyl group connected directly to a carboxylic acid terminus. This colorless liquid has a characteristic acrid smell. China acrylic acid aa is used as a monomer in the production of acrylic resins and forms acrylate esters by combination with alcohols. Acrylic acid china miscible with water, alcohols, ethers, and chloroform. HS code for Acrylic Acid is 2916110000.

As one of the most professional acrylic acid manufacturers in china, Douwin has high-quality acrylic acid for sale for more than 15 years. Douwin has its own adipic acid factory to provide adipic acid with high quality and make sure the quantity supplied. If you are looking for reliable acrylic acid manufacturers in china, Douwin is your trustworthy adipic acid factory and supplier. Please feel free to contact us if needed.
Features of Acrylic Acid/Propenoic acid

Propenoic acid has a low melting point, liquid at normal temperature, for crystallization when the temperature is below 13℃, may polymerize under prolonged exposure to high temperature.

Storage and Delivery of Acrylic acid

With15 years of experience, Douwin has become an experienced adipic acid supplier in China. As a professional chinese acrylic acid aa supplier , Douwin strictly controls the storage and delivery of Acrylic Acid. For the package, acrylic acid for sale is available in drum and isotank. The drum contains 200kg, and the container load for 20FCL is 16tons with pallets. The isotank contains 24MT.

FAQs of Acrylic Acid/ Propenoic Acid

Q.
What is Acrylic Acid?
A.
Acrylic acid is one of the simplest unsaturated carboxylic acids. And it is a colorless liquid with an acrid odor. Acrylic acid is miscible with water, alcohols, ethers and chloroform. Acrylic is composed of a vinyl group directly attached to the end of the carboxylic acid. Acrylic acid is used as a monomer in the production of acrylic resins and forms acrylates by combining them with alcohols.

Q.
What is Acrylic Acid Used for?
A.
Acrylic Acid applications are very extensive, such as water reducing agents, water treatment agents, hydroxyethyl acrylate, hydroxypropyl acrylate and thickener.

For more about boiling point of acrylic acid, contact us.

Acrylamide (AM/Prop 2 Enamide)(2024年02月22日)

douwin-chem — 2024-02-22T15:11:41+0900

https://www.douwin-chem.com/products/acrylamide-am/

Acrylamide is a colorless transparent sheet crystal, odorless, toxic. Acrylamide is soluble in water, ethanol, and slightly soluble in benzene, toluene. HS code for Acrylamide is 2924199040. It is easy to sublimate and polymerization.

Shanghai Douwin, the professional acrylamide supplier in China, can provide you with high-quality Acrylamide. Welcome to contact us for Acrylamide price.
Features of Acrylamide/Prop-2-Enamide

Acrylamide is a hard glassy solid at room temperature. The Acrylamide product has the glue liquid, the latex, and the white powder grain, the translucent bead grain and the thin section, and so on. Prop-2-Enamide has high thermal stability. And Prop-2-Enamide can dissolve in water in any proportion, and the aqueous solution is a uniform and transparent liquid. After long-term storage, the solution viscosity will decrease due to the slow degradation of the polymer, especially when the storage and transportation conditions are poor.

Storage and Delivery of Acrylamide
As a professional acrylamide supplier and manufacturer, we have rich experience in Acrylamide/Prop-2-enamide exportation. So we also have experience in the storage and delivery of Acrylamide/Prop-2-enamide. For the package, Acrylamide is available in bag and container. The bag contains 25kg, and the container load for 20FCL is 12-13 tons with pallets. For 20FCL is 16 tons without pallets."

FAQs of Acrylamide /Prop-2-enamide

Q.
What is acrylamide?
A.
Acrylamide is a colorless transparent sheet crystal. Acrylamide is soluble in water, ethanol, and slightly soluble in benzene, toluene.
What is acrylamide used for?
A.
oilfield auxiliary chemical, Textile auxiliaries, printing and dyeing auxiliary, polymethyl methacrylate

Douwin Chemical is a professional acrylamide manufacturer , we provide organic chemistry compounds, acrylamide hs code, etc. Contact us to buy our products or know more.

DOUWIN ORGANIC CHEMICAL COMPOUNDS SUPPLIER(2024年02月22日)

douwin-chem — 2024-02-22T15:11:13+0900

https://www.douwin-chem.com/products/

Established in 2006, Shanghai Douwin Chemical is your trustworthy partner. DOUWIN can ensure competitive prices and high quality of goods. We are specialized in Methyl Ethyl Ketone, Adipic Acid, Maleic Anhydride, Phthalic Anhydride, Acrylic Esters, Methyl Methacrylate, Acrylamide, and other chemical products.

Types Of Chemical Compounds List
Acrylic Acid And Esters
With years of experience in the industry, Douwin has established a reputation for producing a wide range of high-purity acrylic acid and esters, including methyl acrylate, ethyl acrylate, butyl acrylate, and 2-ethylhexyl acrylate. These products are widely used in the production of various industrial and consumer goods, including coatings, adhesives, plastics, and textiles.
Solvents
Douwin is a company that offers a variety of solvents for sale. These solvents come in different types and can be used for various purposes. Some of the types of solvents that Douwin has for sale include Methyl Ethyl Ketone, Methyl Isobutyl Ketone, Acetone, Butanediol, Butyl Acetate, and many more.
Others
Douwin is a professional chemical compounds company based in China that offers a comprehensive range of chemical compounds to meet the varying needs of different industries. Apart from solvents and acrylic acid and esters, Douwin also provides other kinds of chemical compounds, such as Maleic Anhydride, Adipic Acid, Phthalic Anhydride, Acrylamide, and more.

Advantages of Douwin Chemical

High quality products.

Competitive and good price.

The best partner for upstream and downstream.

Professional and first-class service.

Want to wholesale maleic anhydride, contact us now.

Methyl Ethyl Ketone (MEK) Applications(2023年12月08日)

douwin-chem — 2023-11-27T15:12:10+0900

https://www.douwin-chem.com/mek-methyl-ethyl-ketone-2-butanone-applications/

Coating
Coating is coated in the surface of the object being protected or decorated, and can form a firm adhesion of continuous film with the coated object.

Adhesive
Adhesive is a kind of material with good adhesion property. The act of binding objects together by surface adhesion and cohesion.

PU Coating
PU coating is divided into two categories: wet method and dry method. It is a kind of polymer solution system with a transparent or slightly cloudy appearance and solid content of about 30-35%.Specifi...

Methyl Ethyl Ketone Oxime
Methylethyl ketone oxime is the organic compound with the formula C2H5C(NOH)CH3. This colourless liquid is the oxime derivative of methyl ethyl ketone.

Ink
Ink is a liquid or paste that contain pigments or dyes and is used to color a surface to produce an image, text, or design. Ink is used for drawing or writing with a pen, brush, reed pen, or quill.

What is uses of mek?
Butanone uses are very extensive. Methyl ethyl ketone can synthesize methyl ethyl ketone peroxide, butanone oxime and other chemical compounds. Because methyl ethyl ketone is a very effective solvent, so methyl ethyl ketone (MEK) is often used in the manufacture of coatings, adhesive, ink and so on.

Benefits of Using Methyl Ethyl Ketone
Methyl Ethyl Ketone (MEK) is soluble in water and alcohol and is a highly effective solvent. The characteristics of methyl ethyl ketone as a solvent and its different abilities make it very suitable for manufacturing various other useful liquids, plastics, textiles and chemical intermediates. Douwin Chemical has high quality Methyl Ethyl Ketone/ butanone for sale.

Cautions in Using Methyl Ethyl Ketone (MEK)
Methyl ethyl ketone (Butanone) is a colorless flammable liquid with a strong odor. It may be harmful to the eyes and skin if inhaled or swallowed. MEK should be handled in a well-ventilated area while wearing appropriate personal protective equipment.

For more information about what is mek, please feel free to contact us!

Douwin, as an excellent maleic anhydride manufacturer, offers a wide range of adipic acid for you to choose from.

Methyl Acylate (MA) Applications(2023年12月07日)

douwin-chem — 2023-11-27T15:10:46+0900

https://www.douwin-chem.com/ma-methyl-acylate-applications/

Adhesive (Methyl Acylate Applications)
The adhesive is a kind of material with good adhesion property. The act of binding objects together by surface adhesion and cohesion.

Coating (Methyl Acylate Applications)
The coating is coated in the surface of the object being protected or decorated and can form a firm adhesion of continuous film with the coated object.

Textile Sizing Agent
Textile sizing agent is the general term for all natural and synthetic polymers used in textile systems engineering for their viscous properties.

Wide Applications of Maleic Anhydride
Maleic anhydride is a common and important basic organic chemical raw material. Maleic anhydride is often used in the production of adhesives, paint textile sizing agents, and unsaturated polyester resins. Maleic anhydride is also an important intermediate in the production of lubricant additives, coatings, pesticides and other important intermediates.

Cautions in Using Maleic Anhydride
Maleic anhydride is irritant and can cause pharyngitis, laryngitis and bronchitis when inhaled. Workers need to pay attention to wearing safety glasses, protective clothing and rubber gloves when using maleic anhydride. It is necessary to take a shower and change clothes after work and pay attention to personal hygiene.

Douwin, as an excellent maleic anhydride manufacturer, offers a wide range of adipic acid for you to choose from.

Pesticide Intermediate(2023年12月06日)

douwin-chem — 2023-11-27T15:10:07+0900

https://www.douwin-chem.com/ma-maleic-anhydride-pesticide-intermediate.html

Pesticide intermediate is produced by processing agricultural raw materials, and it is an intermediate medium that combines two or more substances together. In pesticides, it can be construed as a synergist, which is the intermediate material for the production of pesticides.

Specifications of Pesticide Intermediate
The common intermediate types of pesticides include plant growth regulators, fresh aminoester (DA-6), loperamide (KT-30), sodium nitrate, 6-BA, cytokinin, sodium -naphthoacetate, 5-nitroguaiacol sodium, indolebutyric acid, etc.

How is Maleic Anhydride Applied to Pesticide Intermediate?

Pesticide Intermediate is made up of maleic anhydride and hydrochloric acid.
Pesticide intermediates are used in the manufacture of agricultural and other industrial products. They are used in the synthesis of active ingredients or the production of pesticide products through chemical reactions.

Douwin, as an excellent adipic acid factory, offers a wide range of adipic acid for you to choose from.

Maleic Anhydride (MA) Applications(2023年12月05日)

douwin-chem — 2023-11-27T15:09:13+0900

https://www.douwin-chem.com/ma-maleic-anhydride-applications/

Maleic Anhydride Applications

UPR
Unsaturated polyester resin refers to the polycondensation reaction of diacids and diols to form a polymer containing unsaturated double bonds.

Hydrolytic Polymerizd Maleic Anhydride
HPMA is a low molecular weight polyelectrolyte with a general relative molecular weight of 400~800, non-toxic, easily soluble in water, high chemical stability, and thermal stability.

Food Additive
A food additive is a synthetic or natural substance added to food for the purpose of improving the quality of color, aroma, and taste, as well as for the purpose of preservative and processing.

Pesticide Intermediate
Pesticide intermediate is produced by processing agricultural raw materials, and it is an intermediate medium that combines two or more substances together.

What is Maleic Anhydride Used For?
Maleic Anhydride has a very wide range of applications. Maleic anhydride is often used in the production of unsaturated polyesters, coatings, resin modifiers, raw materials for food additives, pesticide intermediates, surfactants, etc.

Cautions in Using Maleic Anhydride
Maleic anhydride is a low-hazard chemical. Maleic anhydride is a skin and respiratory sensitizer. Workers exposed to maleic anhydride may irritate the respiratory tract, eyes, exposed mucous membranes and skin. Therefore, it is recommended that workers wear appropriate personal protective equipment to protect themselves. If unfortunately the skin is contaminated, the worker should wash it with water immediately.

For more information about uses of maleic anhydride, please feel free to contact us!

Comparison of Properties of Butyl Acetate and Methyl Ethyl Ketone As Solvents(2023年12月04日)

douwin-chem — 2023-11-27T15:08:32+0900

https://www.douwin-chem.com/comparison-of-properties-of-butyl-acetate-and-methyl-ethyl-ketone-as-solvents.html

1. Introduction of methyl ethyl ketone
Methyl ethyl ketone (MEK for short), also known as methyl ethyl ketone and 2-butanone, is an excellent organic solvent.

2. Butyl acetate and methyl ethyl ketone solvent properties
Methyl ethyl ketone is mainly used as a solvent, such as azeotropic distillation in the dewaxing of lubricating oil, paint industry and various resin solvents, vegetable oil extraction process and refining process. Its advantages are strong solubility and lower volatility than acetone. And it belongs to boiling point ketone solvent. Butanone is also an intermediate for the preparation of medicines, dyes, detergents, perfumes, antioxidants and certain catalysts. It is used as an anti-peeling agent methyl ethyl ketoxime, polymerization catalyst methyl ethyl ketone peroxide, corrosion inhibitor methylparafynol, etc., and also is used in the electronics industry as a developer for integrated circuit lithography.

Douwin Chemical, one of the butyl acrylate producers, has high quality butyl acetate for sale. As an organic solvent with excellent performance, butyl acetate is widely used in the paint industry and coating industry to make nitrocellulose and its derivatives, varnishes, polyurethane varnishes, alkyd varnishes and colorful paints. Butyl acrylate applications are very extensive. It is also used in camphor, mineral oil, oil ester and synthetic resin, natural and synthetic rubber, ethylene, styrene and other polymer products such as 2-methacrylic acid. At the same time, it is also used in artificial leather and the pharmaceutical industry and electronics industry. It is also used in the plastics industry, perfume industry, and used as an extractant and dehydrating agent in various fields. This product is also used as a flavoring agent for wine due to its low toxicity. In short, the application is very extensive.

Coating(MMA Application)(2023年12月03日)

douwin-chem — 2023-11-27T15:08:01+0900

https://www.douwin-chem.com/coating-methyl-methacrylate-mma-applications.html

Coating(MMA Application)
The mma coating is coated in the surface of the object being protected or decorated, and can form a firm adhesion of continuous film with the coated object, is usually based on resin, or oil, or emulsion, add or do not add pigment, filler, add the corresponding additives, with organic solvent or water prepared from the viscous liquid.

Specifications of Coating
Coating belongs to the organic chemical polymer material, and a coating film formed belongs to the polymer compound type. The coating has the characteristics of covering power, film adhesion, viscosity, fineness, as well as pollution resistance, durability, alkali resistance, and the lowest film-forming temperature.

How is MMA Applied to a Coating?
The coating is composed of MMA methyl methacrylate acid ester and other additives.

Douwin, as an excellent adipic acid manufacturer, offers a wide range of adipic acid for you to choose from.

Leveling Agent(2023年12月02日)

douwin-chem — 2023-11-27T15:07:01+0900

https://www.douwin-chem.com/butyl-acrylate-leveling-agent.html

Leveling agent is a commonly used coating additives, it can make the coating in the process of drying into a smooth, smooth, uniform film.

Specifications of Leveling Agent
Leveling agent can effectively reduce the surface tension of finishing fluid, improve the leveling and uniformity of a class of substances. It includes surfactants, organic solvents and so on. There are many kinds of levelling agents, and the types of levelling agents used in different coatings are not the same.

How is Butyl Acrylate Applied to Leveling Agent?

Leveling agent is composed of butyl acrylate and methyl acrylate as the main raw materials and other additives.

Leveling agent is a chemical substance added to the coating and is often used on metal surfaces that are easily corroded.

Douwin, as an excellent methyl ethyl ketone supplier, offers a wide range of mek methyl ethyl ketone for you to choose from.

Butyl Acrylate (BA) Applications(2023年12月01日)

douwin-chem — 2023-11-27T15:06:22+0900

https://www.douwin-chem.com/butyl-acrylate-applications/

Adhesive (Butyl Acrylate Applications)
The adhesive is a kind of material with good adhesion property. The act of binding objects together by surface adhesion and cohesion.

Resin
In a broad sense, any polymer that can be used as a raw material for processing plastic products is called resin.

Emulsion
The viscosity of emulsified products is low, and it can be dumped under the action of gravity, such emulsified products called emulsion or milk.

Leveling Agent
Leveling agent is a commonly used coating additives, it can make the coating in the process of drying into a smooth, smooth, uniform film.

Wide Applications of butyl acrylate uses
Butyl acrylate is used with a variety of hard monomers to form emulsions, water-soluble copolymers and other polymers through cross-linking, copolymerization and splicing. Butyl acrylate is widely used in the manufacture of paints and coatings, adhesives and sealants. Butyl acrylate can also be used in cleaning products, antioxidants, enamels, and textiles.

Cautions in Using Butyl Acrylate
As one of the professional butyl acrylate suppliers, Douwin has high quality butyl acrylate for sale. Butyl acrylate has low acute toxicity and is flammable. It has the risk of combustion and explosion when exposed to open flame, high heat or oxidizing agents. Workers using butyl acrylate should avoid skin and eye contact. And the environment where butyl acrylate is used should be free from open flames.

Synthesis of Maleic Anhydride(2023年10月01日)

douwin-chem — 2023-09-21T16:28:23+0900

https://www.douwin-chem.com/synthesis-of-maleic-anhydride.html

1. Introduction to maleic anhydride
Maleic anhydride, also known as MAH, is the anhydride of maleic acid. It is a colorless or white solid with acid taste at room temperature, and its molecular formula is C4H2O3. In the early stage, maleic anhydride was prepared by catalytic oxidation of benzene. But in order to reduce the production cost, it is prepared by n-butane oxidation. And maleic anhydride applications are very extensive.

2. Synthesis of maleic anhydride synthesis
Benzene oxidation process
Under the action of catalyst with V2O5 MnO3 as active component and α-Al2O3 as carrier, benzene vapor reacts with air (or oxygen) to form maleic anhydride. Benzene oxidation process is a traditional production method for maleic anhydride, and its technology is mature and reliable. The main technologies include USA SD process, alusuisle / UCB process and catalytic chemical process in Japan, among which SD process is the most widely used.

C4 olefin process
With butene and butadiene as raw materials, maleic anhydride is produced by gas oxidation reaction with air (or oxygen) under the action of V2O5－P2O5 catalyst. During the reaction, n-butene is dehydrogenated to butadiene, and then oxidized to maleic anhydride. In the reaction process, besides the main products, carbon monoxide, carbon dioxide, water and a small amount of acetaldehyde, acetic acid, acrolein and furan are also produced as by-products. The unit consumption of raw materials is high and the efficiency is low. This method has been gradually eliminated.

By-produce process of maleic anhydride production from benzene
When phthalic anhydride is produced from o-xylene, a certain amount of maleic anhydride can be obtained as by-product, and its yield is about 5% of that of phthalic anhydride. In the production of phthalic anhydride, the reaction tail gas is discharged into the atmosphere after the organic matter is removed by the washing tower. The washing liquid is maleic anhydride and a small amount of benzoic acid, phthalic acid and other impurities. After concentration and purification and heating dehydration, the maleic anhydride product is obtained.

N-butane oxidation process
In the process of n-butane oxidation, n-butane is used as raw material to produce maleic anhydride by gas-phase oxidation reaction in the presence of V2O5-P2O5 catalyst. Since its industrialization by Monsanto Company in 1974, the process has been developed rapidly due to the low price of raw materials, less environmental pollution and abundant n-butane resources, which represents the development trend of maleic anhydride production process.

Established in 2006, Shanghai Douwin Chemical is your trustworthy partner. DOUWIN can ensure competitive prices and high quality of goods.

Properties and Stability of Maleic Anhydride(2023年10月01日)

douwin-chem — 2023-09-21T16:27:50+0900

https://www.douwin-chem.com/properties-and-stability-of-maleic-anhydride.html

Ⅰ. Properties of Maleic Anhydride

The molecular formula of maleic anhydride is C4H2O3 and the molecular weight is 98.06. Colorless crystal with strong irritating smell, freezing point 52.8℃, boiling point 202℃, easy to sublime. It is mainly produced by oxidation of n-butane or butene in benzene or C4 fractions. It is a raw material for the production of unsaturated polyester and organic synthesis.

Ⅱ. The Stability of Maleic Anhydride

1. Avoid contact with humid air. Avoid contact with strong oxidants, strong reducing agents, strong acids, strong alkalis, alkali metals, and water. The orthorhombic crystal is a colorless needle-like or flaky crystal. Dissolve in water to generate maleic acid. Soluble in ethanol and generate esters.

Maleic anhydride is soluble in many organic solvents such as ethanol and ether, but hardly soluble in petroleum ether and carbon tetrachloride. Maleic anhydride and water form maleic acid. It is easy to copolymerize vinyl monomers; homopolymerization is also possible. It reacts with a diol to form linear unsaturated polyester and reacts with sulfur trioxide to form sulfonated maleic anhydride. It is combustible and toxic. Rinse with plenty of water when splashed on the skin. The production equipment should be sealed, and the operators should wear protective equipment.

2. Maleic anhydride stimulates the skin and mucous membranes. When the human body comes into contact with high-temperature liquid, its irritation is more serious, which can cause skin burns, conjunctiva and cornea swelling, and in severe cases, vision loss or even blindness. When splashing on the skin, rinse with plenty of water. The production equipment should be sealed, and the operators should wear protective equipment.

Uses of maleic anhydride: maleic anhydride can be used in the production of unsaturated polyester resins, as well as in the production of coatings, drugs, agricultural products and surfactants

Established in 2006, Shanghai Douwin Chemical is your trustworthy partner. DOUWIN can ensure competitive prices and high quality of goods.

Adhesive (Butyl Acrylate Applications)(2023年10月01日)

douwin-chem — 2023-09-21T16:27:21+0900

https://www.douwin-chem.com/butyl-acrylate-adhesive-applications.html

Butyl acrylate adhesive is a kind of adhesive, which is a kind of material with good adhesion properties. The act of binding objects together by surface adhesion and cohesion.

Specifications of Butyl Acrylate Adhesive

poly butyl acrylate adhesive, also known as glue, cement, mucilage, or paste, is any non-metallic substance applied to one or both surfaces of two separate items that binds them together and resists their separation. There are a large number of adhesive types for various applications. As one of the leading butyl acrylate manufacturers in China, we provide high-quality butyl acrylate for sale.

How is Butyl Acrylate (BA) Applied to the Adhesive?

The butyl acrylate adhesive is composed of butyl acrylate and methyl acrylate as the main raw materials and other additives.

Established in 2006, Shanghai Douwin Chemical is your trustworthy partner. DOUWIN can ensure competitive prices and high quality of goods.

Adipic Acid (AA) Applications(2023年10月01日)

douwin-chem — 2023-09-21T16:26:51+0900

https://www.douwin-chem.com/adipic-acid-applications/

What is Adipic Acid Used For?
Adipic acid has a very wide range of applications. At present, adipic acid is mainly used to produce nylon 66. Caprolactam is prepared first, and then nylon 6 is formed by a polycondensation reaction. At the same time, adipic acid also reacts with other chemicals to form plasticizers and synthetic leather.

Cautions in Using Adipic acid
Adipic acid is a mildly toxic chemical compound. When using adipic acid, workers need to protect their skin and eyes from touching it.

Established in 2006, Shanghai Douwin Chemical is your trustworthy partner. DOUWIN can ensure competitive prices and high quality of goods.

Textile Assistant(2023年10月01日)

douwin-chem — 2023-09-21T16:26:19+0900

https://www.douwin-chem.com/acrylamide-textile-assistant.html

Textile Assistant
Textile auxiliaries are necessary chemicals in textile production and processing. Textile auxiliaries play an indispensable role in improving the product quality and added value of textiles.

Specifications of Textile Auxiliaries

Textile auxiliaries can not only endue textiles with various special functions and styles, such as softness, anti-wrinkle, anti-shrinkage, waterproof, antibacterial, antistatic, flame retardant, etc. but also improve the dyeing and finishing process to save energy and reduce processing costs. Textile auxiliaries are very important to improve the overall level of the textile industry and their role in the textile industry chain.

Acrylamide uses in Textile

There are many acrylamide uses in textile. The acrylamide uses in textile are usually used as a sizing agent and finishing agent for fabric post-treatment, which together with other additives can be combined to produce textile auxiliaries which can make textiles more flexible, durable, non-fading, and washable. As a professional Acrylamide supplier, Douwin knows a lot about acrylamide uses in textile and provide high-quality acrylamide. Welcome to contact us, if you need acrylamide.

Acrylamide (AM) Applications(2023年10月01日)

douwin-chem — 2023-09-21T16:25:51+0900

https://www.douwin-chem.com/acrylamide-applications/

Wide Applications of Acrylamide
Acrylamide is a white crystalline chemical substance, which is the raw material for the production of polyacrylamide which is mainly used for water purification in industry. In addition, acrylamide is also used in the production of dye pulp processing and the inner coating of pipes and so on.

Cautions in Using Acrylamide
The acrylamide uses should be carried out in a ventilated place and avoid contact with skin and eyes. Respiratory protection should be worn when working with acrylamide to prevent workers from breathing vapours, mists or gases. When storing acrylamide, it should be stored in dry and ventilated airtight containers.

Established in 2006, Shanghai Douwin Chemical is your trustworthy partner. DOUWIN can ensure competitive prices and high quality of goods.

A Brief Introduction and Characteristics of Acrylic Acid(2023年10月01日)

douwin-chem — 2023-09-21T16:25:20+0900

https://www.douwin-chem.com/a-brief-introduction-and-characteristics-of-acrylic-acid.html

1. What is acrylic acid?

Acrylic acid is an important organic synthesis raw material and synthetic resin monomer, and it is a vinyl monomer with a very fast polymerization rate. Acrylic acid is also known as: acrylic (ester) copolymer, acrylic acid CAS No.: 25035-69-2.

2. Introduction of acrylic acid

Acrylic acid is the simplest unsaturated carboxylic acid, consisting of a vinyl group and a carboxyl group. Pure acrylic acid is a colorless, clear liquid with a characteristic pungent odor. It is miscible with water, alcohol, ether and chloroform, and is prepared from propylene obtained from an oil refinery. Most of them are used to make acrylates such as methylacrylate, ethyl acrylate, butyl acrylate and hydroxyethyl acrylate.

3. The characteristics of acrylic

Waterborne acrylic anti-corrosion coatings are usually used in medium and light anti-corrosion fields, usually consisting of a combination of three coats of primer, middle coat and top coat to form a coating system and play a role. Primer is the basis of the entire coating to prevent the penetration of water, ions and oxygen. It has good adhesion and corrosion resistance. It can be used with water-based epoxy and acrylic primers, and it can also be used with solvent-based coatings to form a composite system.

Acrylic intermediate coating is mainly used to improve the adhesion to the topcoat and primer, to make the bonding between the two coating films closer, increase the thickness of the coating, and improve the shielding ability of the entire coating system; the topcoat has beautiful decoration and anti-permeation effect, usually a pigment-free varnish to improve the weather resistance of the entire coating.

Established in 2006, Shanghai Douwin Chemical is your trustworthy partner. DOUWIN can ensure competitive prices and high quality of goods.

Acrylic Acid (AA) Applications(2023年10月01日)

douwin-chem — 2023-09-21T16:24:06+0900

https://www.douwin-chem.com/aa-acrylic-acid-applications/

Uses of Acrylic Acid
The acrylic acid applications are wide. China acrylic acid AA and its esters are easily combined with themselves or other monomers to form a variety of polymers that are used to make plastics, coatings, adhesives, elastomers, paints and polishes. In addition, acrylic acid is also used in the production of hygienic medical products, detergents and wastewater treatment chemicals. If you want to know more about acrylic acid applications, welcome to contact Douwin. As a professional China acrylic acid AA supplier, we has deep research in acrylic acid applications.

Cautions in Using Acrylic Acid
As a professional Chinese acrylic acid aa supplier, Douwin Chemical has high quality acrylic acid for sale. Acrylic acid is flammable and is a serious irritant to the skin, eyes and respiratory tract. Take care to wear appropriate protective clothing, goggles and face protection when working with acrylic acid. If acrylic acid comes into contact with eyes or skin, immediately rinse the contact area with running water to wash off the acrylic acid. Acrylic acid should usually be stored in a cool and ventilated warehouse.

Synthesis of Maleic Anhydride(2023年01月30日)

douwin-chem — 2023-01-30T16:42:04+0900

https://www.douwin-chem.com/synthesis-of-maleic-anhydride.html

1.Introduction to maleic anhydride

Maleic anhydride, also known as MAH, is the anhydride of maleic acid. It is a colorless or white solid with acid taste at room temperature, and its molecular formula is C4H2O3. In the early stage, maleic anhydride was prepared by catalytic oxidation of benzene. But in order to reduce the production cost, it is prepared by n-butane oxidation. And maleic anhydride applications are very extensive.

2. Maleic Anhydride Synthesis

Benzene oxidation process

Under the action of catalyst with V2O5 MnO3 as active component and α-Al2O3 as carrier, benzene vapor reacts with air (or oxygen) to form maleic anhydride. Benzene oxidation process is a traditional production method for maleic anhydride, and its technology is mature and reliable. The main technologies include USA SD process, alusuisle / UCB process and catalytic chemical process in Japan, among which SD process is the most widely used.

C4 olefin process

With butene and butadiene as raw materials, maleic anhydride is produced by gas oxidation reaction with air (or oxygen) under the action of V2O5－P2O5 catalyst. During the reaction, n-butene is dehydrogenated to butadiene, and then oxidized to maleic anhydride. In the reaction process, besides the main products, carbon monoxide, carbon dioxide, water and a small amount of acetaldehyde, acetic acid, acrolein and furan are also produced as by-products. The unit consumption of raw materials is high and the efficiency is low. This method has been gradually eliminated.

By-produce process of phthalic anhydride

When phthalic anhydride is produced from o-xylene, a certain amount of maleic anhydride can be obtained as by-product, and its yield is about 5% of that of phthalic anhydride. In the production of phthalic anhydride, the reaction tail gas is discharged into the atmosphere after the organic matter is removed by the washing tower. The washing liquid is maleic anhydride and a small amount of benzoic acid, phthalic acid and other impurities. After concentration and purification and heating dehydration, the maleic anhydride production from benzene is obtained.

N-butane oxidation process

In the process of n-butane oxidation, n-butane is used as raw material to produce maleic anhydride by gas-phase oxidation reaction in the presence of V2O5-P2O5 catalyst. Since its industrialization by Monsanto Company in 1974, the process has been developed rapidly due to the low price of raw materials, less environmental pollution and abundant n-butane resources, which represents the development trend of maleic anhydride production process.

If you want to know more types of chemical compounds, please visit our website.

Douwin Chemical is a company whose average employee age is less than 30 years old, and one that has gained a certain reputation in the industry. In 2017, Suzhou Douwin Chemical Co., Ltd. was listed as a key private enterprise in Taicang City. Our company has the advantages of geographical location and the forefront of business philosophy. The most fundamental one is the cohesion of outstanding talents.

Properties and Stability of Maleic Anhydride(2023年01月30日)

douwin-chem — 2023-01-30T16:41:41+0900

https://www.douwin-chem.com/properties-and-stability-of-maleic-anhydride.html

Ⅰ. Properties of Maleic Anhydride

The formula of maleic anhydride is C4H2O3 and the molecular weight is 98.06. Colorless crystal with strong irritating smell, freezing point 52.8℃, boiling point 202℃, easy to sublime. It is mainly produced by oxidation of n-butane or butene in benzene or C4 fractions. It is a raw material for the production of unsaturated polyester and organic synthesis.

Ⅱ. The Stability of Maleic Anhydride

Uses of maleic anhydride: maleic anhydride can be used in the production of unsaturated polyester resins, as well as in the production of coatings, drugs, agricultural products and surfactants

Douwin Chemical Company has four wholly-owned subsidiaries: Shanghai Douwin Chemical Co.,Ltd, Suzhou Douwin Chemical Co.,Ltd, Ningbo Douwin Chemical Co.,Ltd and Dulwich International Co.,Ltd, and also has two joint venture companies: Guangzhou Dewangtai Trading Co.,Ltd. and Suzhou Yanxi Chemical Trading Co., Ltd.These six companies share resources and information and are complementary in upsream suppliers and downstream market information.

Adhesive (Butyl Acrylate Applications)(2023年01月30日)

douwin-chem — 2023-01-30T16:41:17+0900

https://www.douwin-chem.com/butyl-acrylate-adhesive-applications.html

Butyl acrylate adhesive is a kind of adhesive, which is a kind of material with good adhesion properties. The act of binding objects together by surface adhesion and cohesion.

Specifications of Butyl Acrylate Adhesive
Poly butyl acrylate adhesive, also known as glue, cement, mucilage, or paste, is any non-metallic substance applied to one or both surfaces of two separate items that binds them together and resists their separation. There are a large number of adhesive types for various applications. As one of the leading butyl acrylate manufacturers in China, Douwin provides high-quality butyl acrylate for sale.

How is Butyl Acrylate (BA) Applied to the Adhesive?
The butyl acrylate adhesive is composed of butyl acrylate and methyl acylate as the main raw materials and other additives.

Adipic Acid (AA) Applications(2023年01月30日)

douwin-chem — 2023-01-30T16:40:55+0900

https://www.douwin-chem.com/adipic-acid-applications/

PU Coating
Polyurethane coating is a kind of common coating, which can be divided into two-component polyurethane coating and one-component polyurethane coating.

Footwear PU
Polyurethane sole is made of polyurethane resin as the main material by adding various additives.

Nylon-66
Polyhexadiohexylenediamine, commonly known as nylon-66, is a thermoplastic resin, commonly made from polycondensation of adipic acid and hexadiamine.

TPU
TPU (Thermoplastic polyurethanes) name for Thermoplastic polyurethane elastomer rubber.

Adhesive
Adhesive is a substance that binds objects together by means of adhesion."Adhesive" is the general standard term for other types of glues, cement, pastes, ointments, etc.

Plasticizer
The plasticizer is widely used in the industrial production of polymer materials. Any substance added to a polymer material that increases the plasticity of the polymer is called a plasticizer. Plasticizers can improve the performance of polymer materials, reduce production costs and increase production benefits.

What is Adipic Acid Used For?
Adipic acid has a very wide range of applications. At present, Douwin adipic acid is mainly used to produce nylon 66. Caprolactam is prepared first, and then nylon 6 is formed by a polycondensation reaction. At the same time, adipic acid also reacts with other chemicals to form plasticizers and synthetic leather.

Cautions in Using Adipic acid
Adipic acid is a mildly toxic chemical compound. When using adipic acid, workers need to protect their skin and eyes from touching it.

Textile Assistant(2023年01月30日)

douwin-chem — 2023-01-30T16:40:27+0900

https://www.douwin-chem.com/acrylamide-textile-assistant.html

Textile auxiliaries are necessary chemicals in textile production and processing. Textile auxiliaries play an indispensable role in improving the product quality and added value of textiles.

Specifications of Textile Auxiliaries

Acrylamide uses in Textile

Douwin provides you with professional market analysis and strictly control the delivery processs.

Acrylamide (AM) Applications(2023年01月30日)

douwin-chem — 2023-01-30T16:39:56+0900

https://www.douwin-chem.com/acrylamide-applications/

Oilfield Auxiliary Chemical
Oil field auxiliaries are fine chemical products, widely used in oil field exploration and development, exploitation and transportation of oil and gas, and other fields.

Printing and Dyeing Auxiliary
Printing and dyeing auxiliary is used in the process of fabric printing and dyeing, which can improve the effect of printing and dyeing.

Polymethyl Methacrylate
It is an important plastic polymer material developed early, with good transparency, chemical stability and weather resistance, easy dyeing, easy processing, beautiful appearance, and has been widely used in the construction industry.

Wide Acrylamide Uses
Acrylamide is a white crystalline chemical substance, which is the raw material for the production of polyacrylamide which is mainly used for water purification in industry. In addition, acrylamide is also used in the production of dye pulp processing and the inner coating of pipes and so on.

Cautions in Using Acrylamide
The use of acrylamide should be carried out in a ventilated place and avoid contact with skin and eyes. Respiratory protection should be worn when working with acrylamide to prevent workers from breathing vapours, mists or gases. When storing acrylamide, it should be stored in dry and ventilated airtight containers.

Established in 2006, Douwin is your trustworthy partner. DOUWIN can ensure competitive price and good-quality.

A Brief Introduction and Characteristics of Acrylic Acid(2023年01月30日)

douwin-chem — 2023-01-30T16:39:33+0900

https://www.douwin-chem.com/a-brief-introduction-and-characteristics-of-acrylic-acid.html

1. What is acrylic acid?

2. Introduction of acrylic acid

3. The characteristics of acrylic acid

If you want to know more acrylic acid properties, please visit our website.

As a professional supplier, Shanghai Douwin Chemical Co. Ltd. provides chemical materials to all worldwide customers at high quality and competitive prices. Douwin aims to be a famous brand and then becomes the most smooth bridge on the industry chain.

Acrylic Acid (AA) Applications(2023年01月30日)

douwin-chem — 2023-01-30T16:39:05+0900

https://www.douwin-chem.com/aa-acrylic-acid-applications/

Thickener
Thickener, also known as a gelling agent, is a material that can increase latex and liquid viscosity.

Water Reducing Agents
The water-reducing agent is a kind of concrete admixture that can reduce the water consumption of mixing under the condition of maintaining the constant slump of concrete.

Water Treatment Agents
Water treatment agent is a generic term of chemical agents used for water treatment, widely used in petroleum, chemical industry, metallurgy, transportation, light industry, textile, and other industrial sectors.

Hydroxyethyl Acrylate
It's a kind of colorless liquid. Soluble in general organic solvents, and miscible with water.

Hydroxypropyl Acrylate
It is miscible with water in any proportion and dissolves most organic solvents. Easy to aggregate, flammable, toxic.

Acrylic Acid Uses in Industry
The acrylic acid applications are wide. China acrylic acid AA and its esters are easily combined with themselves or other monomers to form a variety of polymers that are used to make plastics, coatings, adhesives, elastomers, paints and polishes. In addition, acrylic acid is also used in the production of hygienic medical products, detergents and wastewater treatment chemicals. If you want to know more about acrylic acid applications, welcome to contact Douwin. As a professional China acrylic acid AA supplier, we has deep research in acrylic acid applications.

Cautions in Using Acrylic Acid
As a professional Chinese acrylic acid supplier, Douwin Chemical has high quality acrylic acid for sale. Acrylic acid is flammable and is a serious irritant to the skin, eyes and respiratory tract. Take care to wear appropriate protective clothing, goggles and face protection when working with acrylic acid. If acrylic acid comes into contact with eyes or skin, immediately rinse the contact area with running water to wash off the acrylic acid. Acrylic acid should usually be stored in a cool and ventilated warehouse.

If you wan to know more details of what is acrylic acid used for, please visit our website.

Phthalic Anhydride (PA/Phthalic Acid Anhydride)(2022年12月18日)

douwin-chem — 2022-12-12T17:31:17+0900

https://www.douwin-chem.com/products/phthalic-anhydride-pa/

Phthalic anhydride is an organic compound, C8H4O3, which is a circular anhydride formed by the dehydration of phthalic acid molecules. Phthalic anhydride is a white solid, it is an important raw material in the chemical industry, especially used in plasticizer manufacture. HS code for PA is 2917350000. As one of the best phthalic anhydride suppliers in China, Douwin has many high-quality products. If you are looking for reliable phthalic anhydride suppliers and phthalic anhydride manufacturers, and interested in phthalic anhydride, please contact us. Douwin is your trustworthy phthalic anhydride supplier and phthalic anhydride manufacturer.

Features of Phthalic Anhydride (PA)
Hypotoxic

The danger of combustion in case of high heat, open flame, or contact with an oxidizer

The eighth category of dangerous goods

Phthalic Anhydride Properties

Phthalic Anhydride Cas Number (Cas No.)85-44-9
Phthalic Anhydride UN Number2214
Phthalic Anhydride Molecular FormulaC8H4O3
Phthalic Anhydride Formula Structure
Phthalic Anhydride Molecular Weight148.11
phthalic anhydride iupac name2-benzofuran-1,3-dione
Phthalic Anhydride SynonymsPhthalic Acid Anhydride
Phthalic Anhydride Density At1.53 g/cm³
Phthalic Anhydride Boiling Point284℃
Phthalic Anhydride Melting Point130.8℃

Storage and Delivery of Phthalic Anhydride / Phthalic Acid Anhydride
As one of the most professional phthalic anhydride suppliers in China, Douwin has great solutions for phthalic anhydride storage and delivery. For the package, PA is available in 25kg/bag, 500kg/bag. Welcome to contact us for more information about phthalic anhydride storage and delivery. Douwin is your reliable phthalic anhydride manufacturer/supplier.

FAQs of Phthalic Anhydride/Phthalic Acid Anhydride

Q.
What is phthalic anhydride made from?
A.
Phthalic Anhydride is made from phthalates or naphthalene.

Q.
What is phthalic anhydride used for?
A.
It is widely used in the production of plasticizers and pigments. It can also be used as a scorch retarder, light stabilizer and heat stabilizer.

Q.
Is phthalic anhydride dangerous?
A.
If exposed to phthalic anhydride, it may cause acute irritation to personnel, including irritation to eyes, respiratory tract and skin, but no permanent damage has been observed.

Q.
Which process reaction does formation of phthalic anhydride take place by?
A.
There are three ways of the phthalic anhydride production process: Ortho-xylene process, naphthaline process and mixing process.

For more information about density of phthalic anhydride and phthalic anhydride allergy, please feel free to contact us!

Methyl Methacrylate (MMA)(2022年12月17日)

douwin-chem — 2022-12-12T17:30:50+0900

https://www.douwin-chem.com/products/methyl-methacrylate-mma/

Methyl methacrylate china, whose chemical formula is C5H8O2 and chemical formula quantity is 100.12, is an organic compound, also known as MMA, or methyl ester for short. HS code for MMA is 2916140010. MMA methacrylate is an important chemical methacrylate raw material and the production of transparent plastic polymethyl methacrylate (PMMA) monomer. Methyl methacrylate is flammable with a strong pungent smell and is moderately toxic. Long-term exposure to methyl methacrylate should be avoided. Douwin is a professional methacrylate monomer supplier in China. If you need methyl methacrylate wholesale, please contact us. We will negotiate with you at a reasonable methyl methacrylate price. Douwin is your reliable methyl methacrylate supplier.

Features of Chemical Methyl Methacrylate (MMA)

Methyl Methacrylate(MMA) is a colorless volatile liquid and has strong spicy, and flammable. Methyl methacrylate products are soluble in ethanol, ethyl ether, acetone, and other organic solvents, and slightly soluble in ethylene glycol and water. Flammable, stable, and easy to polymerize in the presence of light, heat, ionizing radiation, and catalysts. Methyl Methacrylate(MMA) can explode when mixed with air. And Methyl Methacrylate(MMA) is flammable when exposed to open fire, high temperature, and oxidant. Combustion stimulates smoke, and chemical reaction with oxidants, and acids, not long storage, to prevent polymerization.

Methyl Methacrylate (MMA) properties

Methyl Methacrylate Cas Number (Cas No.)80-62-6
Methyl Methacrylate UN Number1247
Methyl Methacrylate Chemical FormulaC5H8O2
Methyl Methacrylate Chemical Structure
Methyl Methacrylate Molecular Weight100.12
Methyl Methacrylate IUPAC NameMethyl 2-methylprop-2-enoate
Methyl Methacrylate SynonymsMethylmethacrylate
Methyl Methacrylate Density At0.944 g/cm3
Methyl Methacrylate Boiling Point100 ℃
Methyl Methacrylate Melting Point-48 ℃

Storage and Delivery of Methyl Methacrylate MMA

As a professional methyl methacrylate supplier, Douwin has great solutions for Methyl Methacrylate package and delivery. For the package, MMA is available in the drum and iso tank. The drum contains 190kg, and the container load for 20FCL is 15.2tons. The iso tank contains 22MT.

FAQs of Methyl Methacrylate (MMA)

Q.
What is methyl methacrylate monomer?
A.
Methyl methacrylate, also known as MMA, or methyl ester for short, is an organic compound. Methyl methacrylate chemical formula is C5H8O2 and chemical formula quantity is 100.12. Methyl methacrylate is an important chemical raw material and the production of transparent plastic polymethyl methacrylate (PMMA) monomer. It is flammable with a strong pungent smell, and is moderately toxic. It is best not to be exposed to methyl methacrylate(MMA) for a long time.

Q.
What is methyl methacrylate used for?
A.
Methyl methacrylate applications are very extensive such as polymethyl methacrylate, emulsified polymer and coating.

Q.
Is methyl methacrylate toxic?
A.
The acute toxicity of methyl methacrylate is low, but repeated inhalation can still cause irritation to the nasal cavity. Higher concentrations of methyl methacrylate can also affect the kidneys and liver.

Q.
Is methyl methacrylate safe in cosmetics?
A.
It is considered safe and rated as a low-hazard ingredient by the cosmetic database.

Methyl Ethyl Ketone (MEK/Butanone)(2022年12月16日)

douwin-chem — 2022-12-12T17:30:25+0900

https://www.douwin-chem.com/products/methyl-ethyl-ketone-mek/

MEK supplies is a clear colorless volatile liquid with a pleasant pungent odor. MEK is the butanone common name (Other Names: Butanone, 2-butanone, Methyl acetone). HS code for MEK is 29141200. Widely used in applications of coating, adhesives, PU coating, MEKO, printing inks, washing solvent, artificial leather, pesticide intermediate. Douwin, as a professional methyl ethyl ketoxime suppliers, has high-quality methyl ethyl ketone for sale. If necessary, welcome consult.

Features of Methyl Ethyl Ketone (MEK)

MEK is precursor chemicals in Category III. The specification of acidity is less than or equal to 0.003, color is less than or equal to 10, density is 0.804-0.806, distillation range 78.5-81.0, the non-volatile matter is less than or equal to 5, moisture is less than or equal to 0.05, purity is greater than or equal to 99.7.

Methyl Ethyl Ketone (MEK) Properties

Methyl Ethyl Ketone Cas Number (Cas No.)78-93-3
Methyl Ethyl Ketone UN Number1193
Methyl Ethyl Ketone Chemical Structural FormulaC4H80
Chemical MEK Structure
Methyl Ethyl Ketone Molecular Weight72.11
Methyl Ethyl Ketone IUPAC Namebutan-2-one
Methyl Ethyl Ketone SynonymsMEK, Butanone, 2-butanone, Methyl acetone
MEK Density At 20d.C.(G/Cm3)0.804-0.806
Methyl Ethyl Ketone Boiling Point79.6℃
Methyl Ethyl Ketone Melting Point-86℃

Storage and Delivery of butanone for sale

MEK is available in the drum, iso tank, and bulk. It can be rationed to fill the drum. Normally the container loaded for 20GP is 13.2 tons, 40GP is 23.1 tons.

FAQs of Methyl Ethyl Ketone (MEK) Production

Q.
Is Methyl Ethyl Ketone (MEK) a solvent?
A.
Yes. Methyl Ethyl Ketone (MEK) solvent is used as a solvent of cellulose acetate, acrylic resin, alkyd resin, paint, ink, etc.

Q.
What is the common name of butanone?
A.
The common name of butanone is methyl ethyl ketone (MEK).

Q.
What is methyl ethyl ketone used for?
A.
Regarding the butanone uses, MEK is used in surface coatings, adhesives, printing inks, chemical intermediates, tapes, and lubricant dewaxing agents. MEK is also used as an extraction medium for fats, oils, waxes, and resins. It can be used as an efficient general-purpose solvent for surface coating.

Q.
How dangerous is MEK?
A.
It is a dangerous chemical, and direct contact can cause certain harm to the human body, such as coughing, dizziness, headache, nausea, blurred vision, and may cause people to pass out.

Q.
Will MEK remove paint?
A.
MEK can remove paint, and it evaporates very fast and will not cause rust.

Douwin Chemical is a professional methyl ethyl ketone manufacturer, we provide mek supplies, adipic acid sigma, butyl acylate, mek methyl ethyl ketone, etc. Contact us to buy our products or know methyl ethyl ketone mek uses.

Phthalic Anhydride (PA) Applications(2022年12月15日)

douwin-chem — 2022-12-12T17:30:00+0900

https://www.douwin-chem.com/pa-phthalic-anhydride-applications/

DBP Plasticizers

Dibutyl phthalate is the most commonly used plasticizer for PVC, which can make the products have good softness. Specifications of DBP PlasticizersDibutyl phthalate is an excellent plasticizer for nit...

DOP Plasticizers

Dioctyl phthalate (DOP), an organic ester compound, is a commonly used plasticizer. Specifications of dopDOP are the most widely used plasticizer in the industry.

Unsaturated Polyester Resins

Unsaturated polyester resin refers to the polycondensation reaction of diacids and diols to form a polymer containing unsaturated double bonds.

Alkyd Resin

Alkyd resin is an oil-modified polyester resin made by condensation polymerization of polyols, phthalic anhydride and fatty acids or oils (triglycerides).

Anthraquinone

Anthraquinone is a synthetic natural dye.

Wide phthalic anhydride applications
Phthalic anhydride is an important industrial chemical. Due to phthalic anhydride properties, it has a very wide range of applications. The uses of phthalic anhydride not only include dyes, agricultural products, but also include pharmaceuticals and other chemical products. Phthalic anhydride pa is often used to make unsaturated polyester resins (UPR), which are used in industries such as electronics and construction automotive parts. Phthalic anhydride is used as a raw material for DBP and DOP plasticizers, and is also used to make dyes. As a professional phthalic anhydride supplier, Douwin Chemical has high quality phthalic anhydride for sale. Our phthalic anhydride uses include plasticiers, unsaturated polyester resins, alkyd resins, dye intermediates, pharmaceutial intermediates, etc. We believe that our products can surely meet your demands.

Cautions in phthalic anhydride uses
Phthalic anhydride is a white organic compound with a pungent odor, which is soluble in water, alcohols and other organic solvents. Phthalic anhydride should be stored in sealed containers in a cool and dry place and kept away from water, acids, strong oxidizing agents, alcohols and amines. Phthalic anhydride is irritating to the skin and eyes and may cause allergic dermatitis or damage to the cornea and conjunctiva. Therefore, workers should wear appropriate personal protective equipment when working with phthalic anhydride. Douwin is a professional phthalic anhydride supplier and manufacturer. We know deeply about the uses of phthalic anhydride and produce high-quality phthalic anhydride. If you want to know more about phthalic anhydride uses, welcome to contact us.

Methyl Methacrylate (MMA) Applications(2022年12月15日)

douwin-chem — 2022-12-12T17:29:30+0900

https://www.douwin-chem.com/methyl-methacrylate-applications/

Coating(MMA Application)

The coating is coated in the surface of the object being protected or decorated and can form a firm adhesion of continuous film with the coated object.

Polymethyl Methacrylate（PMAA）

Polymethyl Methacrylate is a colloquial name for PMMA. The chemical name of this transparent polymer material is polymethyl methacrylate, which is a polymer of methyl methacrylate.

Emulsified Polymers

Emulsified polymers are prepared by adding surfactant to an insoluble polymer solution. Emulsions of this polymer are produced by high speed stirring.

Wide methyl methacrylate application
Methyl methacrylate is not only an organic chemical raw material but also can be directly used as a chemical product. Methyl methacrylate is often used in the manufacture of plexiglass, coatings, lubricant additives, wood sizing agents, paper polishes, etc. As a professional methyl methacrylate manufacturer, we provide high-quality methyl methacrylate at competitive prices.

Cautions in methacrylate uses
Methyl methacrylate is volatile and flammable. Methyl methacrylate forms explosive mixtures with air. At the same time, methyl methacrylate is slightly irritating to the human body and may cause skin allergies. Gloves should be worn when working with methyl methacrylate and skin contact should be avoided as much as possible.

Douwin Chemical is a professional adipic acid supplier, we provide organic chemistry compounds, butyl acylate, etc. Contact us to buy our product

Textile Sizing Agent(2022年12月14日)

douwin-chem — 2022-12-12T17:28:56+0900

https://www.douwin-chem.com/methyl-acylate-textile-sizing-agent.html

Textile sizing chemicals is the general term for all-natural and synthetic polymers used in textile systems engineering for their viscous properties.

Specifications of Textile Sizing Agent

Textile sizing agent must have strong adhesion, high cohesion, can form a layer of skin film on the surface of the fiber, prevent the fiber from fluffing, enhance the strength of the fiber, do not make the strength of the fiber decreased because of weaving. At the same time, it can maintain the elasticity, softness, and elongation of the fiber, so that it can withstand severe friction during the weaving process and reduce breakage. Sizing agent is also required in printing and dyeing processing easy to wash is conducive to printing and dyeing processing.

How is the methyl acrylate applied to textile sizing agent?

Textile sizing agent is composed of butyl acrylate and methyl acrylate as the main raw materials and other additives.

Sizing chemicals are mainly used for warp yarns to improve its performance in the weaving process because the warp yarns are subject to wear from various loom components during the weaving process.

Douwin Chemical is a professional adipic acid factory, we provide organic chemistry compounds, adipic acid sigma, butyl acylate, mma methacrylate, etc. Contact us to buy our products.

Methyl Ethyl Ketone Oxime(2022年12月13日)

douwin-chem — 2022-12-12T17:28:32+0900

https://www.douwin-chem.com/mek-methyl-ethyl-ketone-methylethyl-ketone-oxime.html

Methylethyl ketone oxime is the organic compound with the formula C2H5C(NOH)CH3. This colorless liquid is the oxime derivative of methyl ethyl ketone. MEKO, as it is called in the paint industry, is used to suppress the "skinning" of paints: the formation of a skin on the paint before it is used.

Specifications of Methyl Ethyl Ketone Oxime

methyl ethyl ketone chemical formula:C4H9NO
Density:0.9g/cm3
Boiling point:152.5°C (at 760 mmHg)
Chemical spider:4481809
PubChem CID:96-29-7
methyl ethyl ketone melting point:-30℃

How is Methyl Ethyl Ketone Applied to mek oxime?

Methyl ethyl ketone oxime is composed of methyl ethyl ketone, hydroxylammonium phosphate, and other auxiliaries.

Among them, MEK accounts for 72%, hydroxylammonium phosphate accounts for 24%, and auxiliaries account for 4%.

Douwin Chemical is a professional methyl methacrylate manufacturer, we provide organic chemistry compounds, chemical mek, butanone oxime in paint, butyl acylate, etc. Contact us to buy our products.

Adhesive(2022年12月12日)

douwin-chem — 2022-12-12T17:28:00+0900

https://www.douwin-chem.com/mek-methyl-ethyl-ketone-adhesive.html

The adhesive is a kind of material with good adhesion property. The act of binding objects together by surface adhesion and cohesion.

Specifications of Adhesive
Adhesive, also known as glue, cement, mucilage, or paste, is any non-metallic substance applied to one or both surfaces of two separate items that binds them together and resists their separation. There are a large number of adhesive types for various applications.

How is methyl ethyl ketone applied to the adhesive?

The adhesive is made up of alkyd resins, methyl ethyl ketone glue
Among them, alkyd resins account for 54%, MEK accounts for 22%, tackifying resin accounts for 12%, filling accounts for 9%, and auxiliaries account for 3%.

Douwin Chemical is a professional acrylamide manufacturer, we provide organic chemistry compounds, mek adhesive, butyl acylate, etc. For more information, please feel free to contact us!

Methyl Ethyl Ketone (MEK) Applications(2022年10月20日)

douwin-chem — 2022-10-20T15:33:47+0900

https://www.douwin-chem.com/mek-methyl-ethyl-ketone-2-butanone-applications/

Coating

Coating is coated in the surface of the object being protected or decorated, and can form a firm adhesion of continuous film with the coated object.

Adhesive

Adhesive is a kind of material with good adhesion property. The act of binding objects together by surface adhesion and cohesion.

PU Coating

PU coating is divided into two categories: wet method and dry method. It is a kind of polymer solution system with a transparent or slightly cloudy appearance and solid content of about 30-35%.Specifi...

Methyl Ethyl Ketone Oxime

Methylethyl ketone oxime is the organic compound with the formula C2H5C(NOH)CH3. This colourless liquid is the oxime derivative of methyl ethyl ketone.

Ink

Ink is a liquid or paste that contain pigments or dyes and is used to color a surface to produce an image, text, or design. Ink is used for drawing or writing with a pen, brush, reed pen, or quill.

What is Methyl Ethyl Ketone Used For?
Butanone uses are very extensive. Methyl ethyl ketone can synthesize methyl ethyl ketone peroxide, butanone oxime and other chemical compounds. Because methyl ethyl ketone is a very effective solvent, so methyl ethyl ketone (MEK) is often used in the manufacture of coatings, adhesive, ink and so on.

Douwin Chemical is a professional methyl methyl methacrylate supplier, we provide organic chemistry compounds, phthalic anhydride, etc. Want to know what is mek or mek uses.

Methyl Acylate (MA) Applications(2022年10月20日)

douwin-chem — 2022-10-20T15:33:18+0900

https://www.douwin-chem.com/ma-methyl-acylate-applications/

Adhesive (Methyl Acylate Applications)

The adhesive is a kind of material with good adhesion property. The act of binding objects together by surface adhesion and cohesion.

Coating (Methyl Acylate Applications)

The coating is coated in the surface of the object being protected or decorated and can form a firm adhesion of continuous film with the coated object.

Textile Sizing Agent

Textile sizing agent is the general term for all natural and synthetic polymers used in textile systems engineering for their viscous properties.

Douwin Chemical is a professional acrylamide manufacturer, we provide chemical compound, phthalic anhydride, etc. Contact us to buy our products or know more.

Pesticide Intermediate(2022年10月20日)

douwin-chem — 2022-10-20T15:32:47+0900

https://www.douwin-chem.com/ma-maleic-anhydride-pesticide-intermediate.html

Pesticide Intermediate
Related Organic Chemcial Compounds

Maleic Anhydride (MA/Maleic Acid Anhydride)
Specifications of Pesticide Intermediate

The common intermediate types of pesticides include plant growth regulators, fresh aminoester (DA-6), loperamide (KT-30), sodium nitrate, 6-BA, cytokinin, sodium -naphthoacetate, 5-nitroguaiacol sodium, indolebutyric acid, etc.

How is Maleic Anhydride Applied to Pesticide Intermediate?

Pesticide Intermediate is made up of maleic anhydride and hydrochloric acid.

Pesticide intermediates are used in the manufacture of agricultural and other industrial products. They are used in the synthesis of active ingredients or the production of pesticide products through chemical reactions.

Douwin Chemical is a professional acrylamide supplier, we provide chemical compound, phthalic anhydride, etc. Contact us to buy our products or know more.

Maleic Anhydride (MA) Applications(2022年10月20日)

douwin-chem — 2022-10-20T15:32:20+0900

https://www.douwin-chem.com/ma-maleic-anhydride-applications/

UPR

Unsaturated polyester resin refers to the polycondensation reaction of diacids and diols to form a polymer containing unsaturated double bonds.

Hydrolytic Polymerizd Maleic Anhydride

HPMA is a low molecular weight polyelectrolyte with a general relative molecular weight of 400~800, non-toxic, easily soluble in water, high chemical stability, and thermal stability.

Food Additive

A food additive is a synthetic or natural substance added to food for the purpose of improving the quality of color, aroma, and taste, as well as for the purpose of preservative and processing.

Pesticide Intermediate

Pesticide intermediate is produced by processing agricultural raw materials, and it is an intermediate medium that combines two or more substances together.

Douwin Chemical is a professional maleic anhydride factory, we provide organic chemistry compounds, phthalic anhydride, etc.want to know uses of maleic anhydride or maleic anhydride applications.

Comparison of Properties of Butyl Acetate and Methyl Ethyl Ketone As Solvents(2022年10月20日)

douwin-chem — 2022-10-20T15:31:45+0900

https://www.douwin-chem.com/comparison-of-properties-of-butyl-acetate-and-methyl-ethyl-ketone-as-solvents.html

1. Introduction of methyl ethyl ketone

Methyl ethyl ketone (MEK for short), also known as methyl ethyl ketone and 2-butanone, is an excellent organic solvent.

2. Butyl acetate and methyl ethyl ketone solvent properties

Methyl ethyl ketone is mainly used as a solvent, such as azeotropic distillation in the dewaxing of lubricating oil, paint industry and various resin solvents, vegetable oil extraction process and refining process. Its advantages are strong solubility and lower volatility than acetone. And it belongs to boiling point ketone solvent. Butanone is also an intermediate for the preparation of medicines, dyes, detergents, perfumes, antioxidants and certain catalysts. It is used as an anti-peeling agent methyl ethyl ketoxime, polymerization catalyst methyl ethyl ketone peroxide, corrosion inhibitor methylparafynol, etc., and also is used in the electronics industry as a developer for integrated circuit lithography.

Douwin Chemical is a professional adipic acid factory, we provide organic chemistry compounds, phthalic anhydride, etc. Contact us to buy our products or know more.

Coating(MMA Application)(2022年10月20日)

douwin-chem — 2022-10-20T15:31:08+0900

https://www.douwin-chem.com/coating-methyl-methacrylate-mma-applications.html

The mma coating is coated in the surface of the object being protected or decorated, and can form a firm adhesion of continuous film with the coated object, is usually based on resin, or oil, or emulsion, add or do not add pigment, filler, add the corresponding additives, with organic solvent or water prepared from the viscous liquid.

Coating(MMA Application)
Related Organic Chemcial Compounds

Methyl Methacrylate (MMA)
Specifications of Coating

Coating belongs to the organic chemical polymer material, and a coating film formed belongs to the polymer compound type. The coating has the characteristics of covering power, film adhesion, viscosity, fineness, as well as pollution resistance, durability, alkali resistance, and the lowest film-forming temperature.

How is MMA Applied to a Coating?

The coating is composed of MMA methyl methacrylate acid ester and other additives.

Douwin Chemical is a professional adipic acid suppliers, we provide organic chemistry compounds, phthalic anhydride, etc. Contact us to buy our products or know more.

Leveling Agent(2022年10月20日)

douwin-chem — 2022-10-20T15:30:22+0900

https://www.douwin-chem.com/butyl-acrylate-leveling-agent.html

Leveling agent is a commonly used coating additives, it can make the coating in the process of drying into a smooth, smooth, uniform film.

Leveling Agent
Related Organic Chemcial Compounds

Butyl Acrylate (BA)
Specifications of Leveling Agent

Leveling agent can effectively reduce the surface tension of finishing fluid, improve the leveling and uniformity of a class of substances. It includes surfactants, organic solvents and so on. There are many kinds of levelling agents, and the types of levelling agents used in different coatings are not the same.

How is Butyl Acrylate Applied to Leveling Agent?

Leveling agent is composed of butyl acrylate and methyl acrylate as the main raw materials and other additives.

Leveling agent is a chemical substance added to the coating and is often used on metal surfaces that are easily corroded.

Douwin Chemical is a professional maleic anhydride supplier, we provide organic chemistry compounds, phthalic anhydride, etc. Contact us to buy our products or know more.

Butyl Acrylate (BA) Applications(2022年10月20日)

douwin-chem — 2022-10-20T15:29:30+0900

https://www.douwin-chem.com/butyl-acrylate-applications/

Adhesive (Butyl Acrylate Applications)

The adhesive is a kind of material with good adhesion property. The act of binding objects together by surface adhesion and cohesion.

In a broad sense, any polymer that can be used as a raw material for processing plastic products is called resin.

Emulsion

The viscosity of emulsified products is low, and it can be dumped under the action of gravity, such emulsified products called emulsion or milk.

Leveling Agent

Leveling agent is a commonly used coating additives, it can make the coating in the process of drying into a smooth, smooth, uniform film.

Wide Applications of Butyl Acrylate
Butyl acrylate is used with a variety of hard monomers to form emulsions, water-soluble copolymers and other polymers through cross-linking, copolymerization and splicing. Butyl acrylate is widely used in the manufacture of paints and coatings, adhesives and sealants. Butyl acrylate can also be used in cleaning products, antioxidants, enamels, and textiles.

Douwin Chemical is a professional methyl ethyl ketone manufacturer, we provide organic chemistry compounds, phthalic anhydride, etc. Contact us to buy our products or know butyl acrylate uses.

Phthalic Anhydride and Its Chemical Properties(2022年08月08日)

douwin-chem — 2022-08-02T18:29:53+0900

https://www.douwin-chem.com/phthalic-anhydride-and-its-chemical-properties.html

1. Phthalic anhydride meaning and physical properties of phthalic anhydride
The phthalic anhydride meaning: phthalic anhydride is also known as the phthalic acid anhydride; 1,2-benzenedicarboxylic acid an-hydride; 1,2-benzenedicarboxylic anhydride; 1,3-isobenzofurandione; 1,3-phthalandione, etc. The phthalic anhydride chemical formula is C8H4O3 and abbreviation is PA. It is a cyclic acid anhydride formed by the dehydration of phthalic acid molecule. It is a white powder or scaly crystalline solid with a specific gravity of 1.527 (4°C). The flash point of pure phthalic anhydride is 152°C, the melting point is 130.8°C, and the boiling point of phthalic anhydride is 284.5°C; It is easy to have phthalic anhydride sublimation, phthalic anhydride solubility in water, hydrolyzed to phthalic acid in hot water, easily soluble in ethanol, benzene and pyridine, and slightly soluble in ether; This product is moderately toxic and can cause asthma: It has been reported that with long-term inhalation, it may bring damage to the reproductive, nervous, liver and kidney systems, as well as irritation to the skin, mucous membranes, especially the cornea. Therefore, necessary protection is needed when touching the product to ensure personal safety.

Phthalic anhydride is a white solid material, with common phthalic anhydride applications in the chemical industry, which is especially used for the manufacture of plasticizers. Both dibutyl phthalate and dioctyl phthalate are important plasticizers. Phthalic anhydride and polyols (such as glycerol, pentaerythritol) are polycondensed to form polyarylate resin, which is used in the paint industry; If it is polycondensed with ethylene glycol and unsaturated acid, it generates unsaturated polyester resin, which can be used to make insulating paint and glass fiber reinforced plastic. Phthalic anhydride is also a raw material for the synthesis of benzoic acid and terephthalic acid, and is also used in the synthesis of medicines. Phthalic anhydride can produce hydrolysis, alcoholysis and ammonolysis reactions, and can react with aromatic hydrocarbons to synthesize anthraquinone derivatives. Phthalic anhydride is industrially prepared by the vapor-phase oxidation of naphthalene and air at 350-360°C under the catalysis of the vanadium pentoxide. It can also be prepared by the oxidation of o-xylene with air.
2. The chemical phthalic acid properties
Phthalic anhydride can produce hydrolysis, alcoholysis and ammonolysis reactions, and react with aromatic hydrocarbons to synthesize anthraquinone derivatives. Phthalic anhydride is industrially prepared by the vapor-phase oxidation of naphthalene and air at 350-360°C under the catalysis of vanadium pentoxide. It can also be prepared by the oxidation of o-xylene with air. Phthalic anhydride can be used to take the place of phthalic acid and mainly react with monohydric alcohols to form esters, such as dibutyl phthalate and dioctyl phthalate.

As a professional supplier, Shanghai Douwin Chemical Co. Ltd. provides chemical materials to all worldwide customers at high quality and competitive prices.

What Is the Main Use of Adipic Acid?(2022年08月07日)

douwin-chem — 2022-08-02T18:29:20+0900

https://www.douwin-chem.com/what-is-the-main-use-of-adipic-acid.html

1. The chemical adipic acid properties

Adipic acid is a white crystalline powder with a melting point adipic acid of 153°C, a density of 1.360g/cm³, mp153°C, and a normal boiling point of adipic acid of 337.5°C. It starts to decompose at 330.5°C and has a flash point of 210°C and 191°C (closed-mouth). It is one of the types of compounds in organic chemistry.

2. The functions of adipic acid

Adipic acid is mainly used as a raw material for nylon 66 and engineering plastics, as well as for the production of various ester products, and as the raw material for polyurethane elastomers. Adipic acid is also a raw material for medicine, yeast purification, pesticides, adhesives, synthetic leather, synthetic dyes and perfumes.

3. The adipic acid uses

Adipic acid is used as a raw material for the synthetic high polymers, and also used to make plasticizers and lubricants. Adipic acid is a white crystalline solid, which is easily soluble in alcohol and ether, soluble in acetone, slightly soluble in cyclohexane and benzene. When the mass content of oxygen in the adipic acid is higher than 14%, it is easy to generate static electricity and cause fire. The mass content of adi pic acid dust which may explode in the air ranges from 3.9% to 7.9%. Adipic acid is the most valuable dibasic acid among the aliphatic dibasic acids. It can produce salt forming reaction, esterification reaction, amidation, etc., and can be polycondensed with diamines or dihydric alcohols to form high-molecular polymers, etc.

It is a white crystal with a melting point of 153.0 to 153.1℃. It is an industrially important dicarboxylic acid, and its output ranks second among all dicarboxylic acids. It is mainly used in the production of adiponitrile so as to produce hexamethylene diamine, and then together with hexamethylene diamine to produce nylon 66. In addition, it is also used to produce unsaturated polyester, hexanediol and adipic acid esters.

In 1937, the American DuPont Company used nitric acid to oxidize cyclohexanol (prepared by the hydrogenation of phenol), and first realized the industrial production of the adipic acid.

In the 1960s, the industry gradually changed to adopt the cyclohexane oxidation method, that is, the intermediate product cyclohexanone and cyclohexanol mixture (that is, ketol oil, also known as ka oil) is prepared from cyclohexane, and then the ka oil is oxidized with the nitric acid or air. The catalyst used in the reaction is copper-vanadium series (copper of 0.1% to 0.5%, vanadium of 0.1% to 0.2%), with a temperature of 60 to 80℃and pressure of 0.1 to 0.4mpa. The yield is 92% to 96% of the theoretical value. After nitric acid is distilled from the oxidation product of ka oil, high-purity adipic acid can be obtained through two-stage crystallization and refining.

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