By Victor H. Agreda
Outstanding a stability among uncomplicated chemistry and chemical engineering, this updated reference discusses very important elements of acetic acid and its significant derivatives, together with chemistry, equipment of training and manufacture, and synthesis, in addition to present and rising downstream technologies.;The booklet offers finished actual estate facts for compounds and their separation, together with acetic acid-water separation. Describing 5 different types of concepts for the manufacture of acetic acid, it: examines thermophysical homes and aqueous recommendations, with specific motives of mathematical types and correlations; provides a serious research of estate; outlines production bills and comparable fiscal components; experiences the purposes of acetic acid and derivatives; covers the chemistry and guidance of the derivatives; elucidates fresh themes resembling deicers, esters and new esterification applied sciences.
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This decomposition reaction is promoted by metal salts, especially manganese acetate. Peracetic acid in the presence of acetic acid at temperatures >40°C decomposes to acetic acid and oxygen [Eq. (13)]. Use of cobalt acetate and copper acetate as catalysts promotes the formation of acetic anhydride. < previous page page_20 next page > page_21 < previous page page_21 next page > Page 21 Recent literature references concerning acetaldehyde oxidation show that acetic anhydride and formic acid formation are reduced by inclusion of an alkali metal acetate in the presence of an aqueous manganese, cobalt, or nickel acetate catalyst [42,43]; mild acetaldehyde oxidation conditions are employed using oxygen complexes of cuprous halide and a phosphine oxide in liquid phase ; use of a ferrous cyanide complex with oxygen provides mild oxidizing conditions and reduces by-product formation ; acetaldehyde oxidation with oxygen over a molybdenumphosphoruscoppervanadiummetal oxide catalyst gives high acetaldehyde conversions and acid selectivity without production of a peroxy acid intermediate ; and an improved acetic acid process is obtained by the use of a reoxidation stage to eliminate acetaldehyde recycle and allow reuse of manganese acetate catalyst in the process .
Patent 4,285,875 (1981). 46. Pedersen, S. , Hardman, H. , and Wagner, L. S. Patent 4,408,071 (1983). < previous page page_24 next page > page_25 < previous page page_25 next page > Page 25 47. S. Patent 4,094,901 (1978). 48. , Park Ridge, New Jersey, 1967, p. 6. 49. Hobbs, C. , and Van't, H. S. Patent 3,914,296 (1975). 50. McCain, J. , and Kaiser, S. , European Patent Appl. EP 294,846 (1988). 51. Shakhtakhtinskii, T. , Aliev, A. , Kuliev, A. , Mamedov, F. , Babaeva, A. , Naraevskaya, S. , and Medzhidova, S.
51% ferric sulfate. This affords a 7% solution of acetaldehyde in 9395% yield with a 55% acetylene conversion per pass [Eq. (4)]. Ferric sulfate or manganese dioxide is used to retard the reduction of mercury and maintain catalyst activity. This oxidant is maintained in its active, oxidized state by treatment of a catalyst slip stream with 30% nitric acid. 9%. Acetone is the major < previous page page_17 next page > page_18 < previous page page_18 next page > Page 18 by-product generally recovered; unrecovered by-products are acetic acid, diacetyl, and crotonaldehyde.