C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
202/58, 260/536.
C07C 53/08 (2006.01) C07C 51/235 (2006.01) C07C 53/12 (2006.01)
Patent
CA 1095078
ABSTRACT OF THE DISCLOSURE 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 pre- sence of an aliphatic carboxylic acid ester as a diluent. More specifically, the reaction is effected at temperatures of 62 to 90°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 carboxy- lic acid ester and water are distilled off overhead and separated into two phases. Next, the organic phase is re- cycled with a reflux ratio of at least 1:1 to the distil- ling 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.
317491
Erpenbach Heinz
Gehrmann Klaus
Hauser Alfred
Karrenbauer Kurt
Lork Winfried
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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