Hoechst Aktiengesellschaft

Uhde Gmbh

Aladar Lienerth

Gunter Heck

Gunter Roscher

Dominik Dempf

Egon Malow

Hartmut Ilgner

Klaus H Kaiser

Hermann Neu

Horst Langner

Karl-Heinz Schmidt

Natarajan Thiagarajan

Karl-Heinz Schwarz

Uwe Faust

The invention relates to a process for the production of grade AA methanol by distilling raw methanol in several distillation stages, for separating grade AA methanol, tail gas, and fusel oil from the raw methanol and further processing the fusel oil to produce additional methanol of grade AA quality at a return ratio of 5:1 or higher.

Process for the production of grade AA methanol

A process for continuous rectification of a liquid mixture containing alcohols, particularly a liquid fermate, employs a plurality of distillation columns to which the liquid mixture is fed in parallel, and which have successively reduced operating pressures and temperatures from an initial one to a final one thereof. The top vapor distillate from the higher-pressure columns supplies driving heat to the sumps of the next successively lower-pressure columns. Direct steam at 130.degree. C. to 160.degree. C. is fed to the sump of the column operated at the highest pressure. Direct steam is generated by indirect heat exchange of water with the top vapor withdrawn from the columns, and the resulting direct steam is fed to the sumps of the next-lower-pressure columns. The apparatus can also include a section for the production of absolute alcohol.

Process for the continuous rectification of alcoholic fermates

Process for separating water from a gas mixture, obtained in the manufacture of vinyl acetate by reacting ethylene with acetic acid and oxygen in contact with catalysts containing palladium or palladium compounds in the gaseous phase said gas mixture consisting essentially of acetic acid, vinyl acetate, water, carbon dioxide and ethylene, wherein

Process for separating water from mixtures thereof with vinyl acetate

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Aladar Lienerth