What is acetic anhydride

Categories:Company News
Time of issue:2021-06-14
Views:1406

What is acetic anhydride

Categories:Company News
Time of issue:2021-06-14
Views:1406

Acetic anhydride is an important acetylating agent. Acetic anhydride is used to produce cellulose acetate, acetate plastics and nonflammable films. In the pharmaceutical industry, dysentrromycin, debazole, caffeine and aspirin are used for synthesis., Sulfonamide drugs, etc; It is mainly used in the production of disperse dark blue hydrochloric acid, disperse scarlet s-swel, disperse yellow brown s-2rel, etc; It is used in the perfume industry to produce coumarin, ice sheet acetate, musk, acetic acid, rosin acetate, ethyl acetate, vanillin acetate, etc; The acetyl peroxide prepared from acetic anhydride is the initiator and bleach used for polymerization. It is used as solvent and water remover, and also as important acetylation agent and polymer initiator. The application is cellulose acetate and cellulose acetate plastic. Most of this fiber is used to make cigarette filters, marine industrial fabrics and daily fabrics. It can also make cyclonic trinitroamine. Check alcohols, aromatic primary and secondary amines. Used in organic synthesis, dyes, pharmaceutical industry and the manufacture of acetyl compounds. It is used as solvent and water remover, and also as important acetylation agent and polymer initiator. The products used are cellulose acetate and cellulose acetate plastics. Most of this fiber is used to make cigarette filters, marine industrial fabrics and daily fabrics. It can also make cyclonic trinitroamine. It can also be used in medicine, dyes, spices, etc. It can also be used as acetylating agent in the process of manufacturing 1-phenyl-2-acetone and n-acetyl-o-phenyladic acid, and also as a complex for the production of heptanone, new pyranone and methamphetamine. 1. storage precautions shall be stored in a cool, dry and well ventilated warehouse. Keep away from fire and heat. Storage temperature shall not exceed 32 ° C. The relative humidity shall not exceed 80%. Keep container closed. It should be stored separately from oxidant, reductant, acid, alkali, active metal powder, alcohol, etc. Do not store them together. Use explosion proof lighting and ventilation facilities. It is forbidden to use mechanical equipment and tools which are easy to generate sparks. The storage area shall be equipped with leakage emergency treatment equipment and suitable accommodation materials. 2. packed in aluminum bucket or aluminum tank, with a net weight of 100kg or 200kg. It can also be stored and transported by aluminum tankers. The packing container shall be cleaned, dried and pressure tested before use. After the acetic anhydride is filled quantitatively, it should be sealed and transported. Avoid severe vibration during transportation. The cover shall be attached to the means of transport. Store in cool, dry and ventilated places, avoid sunlight, away from fire source, heat source, nitric acid, chromium trioxides and other oxidants. Please store and transport hazardous materials as required[ 2] 1. the method of vinyl ketone is a common method in the world industrial production. Acetic acid is pyrolysis to form ethylene ketone, then condensed with crotonaldehyde to form polyester, and then hydrolyzed and refined to obtain the product. 2. malonic acid method is derived from condensation and decarboxylation of malonic acid and crotonaldehyde. 3. acetone method is made by dehydrogenation of acetone and crotonaldehyde. 4. butadiene method is prepared by using butadiene and acetic acid as raw materials, under the presence of manganese acetate catalyst, under pressure and pressure at 140 ℃ γ ethylene γ Butyrolactone. The sorbic acid was obtained by ring opening of butyrolactone under the action of acid ion exchange resin. 5. acetylketone can be obtained by cracking acetic acid at high temperature, and then absorbed by acetic acid to obtain acetic acid. During purification, acetic anhydride can be obtained by adding benzene to azeotropic distillation to remove acetic acid or vacuum distillation.

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