Production of acetic anhydride and acetic acid from acetaldehyde

Details Production of acetic anhydride and acetic acid from acetaldehyde Production of acetic anhydride and acetic acid from acetaldehyde

1978-12-13

1981-02-24

Garner, Vivian

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acids and salts thereof

260546, C07C 51235, C07C 5308, C07C 5312

Patent

active

042529832

ABSTRACT:
Acetic acid and acetic anhydride are produced continuously from acetaldehyde which is reacted by oxidizing it with gaseous oxygen in liquid phase in the presence of copper acylate and cobalt acylate as a catalyst and in the presence of an aliphatic carboxylic acid ester as a diluent. More specifically, the reaction is effected at temperatures of 62.degree. to 90.degree. C. over a period of less than 20 minutes with the use of the diluent and acetaldehyde in a quantitative ratio of 60:40 to 40:60; the resulting reaction products are delivered to a distilling zone in which the carboxylic acid ester and water are distilled off overhead and separated into two phases. Next, the organic phase is recycled with a reflux ratio of at least 1:1 to the distilling zone; base product accumulating in the distilling zone is delivered to an evaporating zone in which 2 to 12 parts by weight of an acetic acid/acetic anhydride-mixture as distillate are produced per part by weight of catalyst solution as base product.

REFERENCES:
patent: 2170002 (1939-08-01), Benson
patent: 3119862 (1964-01-01), Alheritere

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