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Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH 3 CO) 2 O. Commonly abbreviated Ac 2 O , it is the simplest isolable anhydride of a carboxylic acid and is widely used as a reagent in organic synthesis .
Methyl acetate is produced industrially via the carbonylation of methanol as a byproduct of the production of acetic acid. [6] Methyl acetate also arises by esterification of acetic acid with methanol in the presence of strong acids such as sulfuric acid; this production process is famous [according to whom?] because of Eastman Kodak's intensified process using a reactive distillation.
The first method of production of sec-butyl acetate was the esterification of sec-butanol and acetic anhydride [5] It was experimentally determined and published in 1946 by Rolf Altschul. [ 6 ] Toxicology
In the laboratory, it can be easily synthesized from anthranilic acid and acetic anhydride. N-Acetylanthranilic acid exhibits triboluminescence when crushed. [5] The fractured crystals have large electrical potentials between areas of high and low charge.
Triacetin was prepared in the 19th century from glycerol and acetic acid. [13] Its synthesis from acetic anhydride and glycerol is simple and inexpensive. 3 (CH 3 CO) 2 O + 1 C 3 H 5 (OH) 3 → 1 C 3 H 5 (OCOCH 3) 3 + 3 CH 3 CO 2 H. This synthesis has been conducted with catalytic sodium hydroxide and microwave irradiation to give a 99% yield ...
Thioacetic acid is prepared by the reaction of acetic anhydride with hydrogen sulfide: [5] (CH 3 C(O)) 2 O + H 2 S → CH 3 C(O)SH + CH 3 C(O)OH. It has also been produced by the action of phosphorus pentasulfide on glacial acetic acid, followed by distillation. [6] CH 3 C(O)OH + P 2 S 5 → CH 3 C(O)SH + P 2 OS 4. Thioacetic acid is typically ...
The worldwide production of acetic anhydride is a major application, and uses approximately 25% to 30% of the global production of acetic acid. The main process involves dehydration of acetic acid to give ketene at 700–750 °C. Ketene is thereafter reacted with acetic acid to obtain the anhydride: [50] CH 3 CO 2 H → CH 2 =C=O + H 2 O
Cellulose triacetate, triacetate, CTA or TAC is a chemical compound produced from cellulose and a source of acetate esters, typically acetic anhydride. Triacetate is commonly used for the creation of fibres and film base. It is chemically similar to cellulose acetate.