Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material
Patent
1985-09-10
1988-01-05
Bashore, S. Leon
Distillation: processes, separatory
With chemical reaction
Including step of adding catalyst or reacting material
203 49, 203 75, 203 77, 203 78, 203 80, 203 82, 203 84, 203DIG6, 568411, B01D 500
Patent
active
047174544
ABSTRACT:
A process for removing by product acetone from reaction mixtures obtained by reacting methyl acetate and/or dimethylether with carbon monoxide at elevated temperatures to obtain acetic anhydride in the presence of a catalyst system consisting essentially of carbonyl complexes of noble metals belonging to group VIII of the Periodic System of the elements, acetic acid, an organophosphorus or organonitrogen compound, and methyl iodide whereby the acetone obtained as a by-product during the reaction is subjected to condensation at temperatures of 50.degree. to 250.degree. C., under pressures of 0.01 to 150 bars and at a molar ratio as above defined for the catalyst system constituent of 1:(25-500):(10-100):(15-150) so as to obtain predominantly higher-boiling secondary products to be distillatively separated in a successive distillation zone together with volatile constituents of the catalyst system.
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Erpenbach Heinz
Gehrmann Klaus
Horstermann Peter
Kohl Georg
Bashore S. Leon
Hoechst Aktiengesellschaft
Manoharan V.
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