Method for making isobutyric acid

Details Method for making isobutyric acid Method for making isobutyric acid

1988-12-20

1991-02-12

Lone, Werren B.

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

Organic compounds

Carboxylic acids and salts thereof

203 88, 203 91, C07C 5114

Patent

active

049925822

ABSTRACT:
In the continuous preparation of isobutyric acid by the Koch synthesis from propylene, carbon monoxide, and water or an alcohol in hydrogen fluoride under pressure, the reaction mixture, after reaction, is depressurized, a principal amount of the gaseous components to be removed is separated, the remaining liquid phase is introduced into the middle to upper region of a distillation column in which base temperature is kept above the boiling point of isobutyric acid and the head temperature is kept near the boiling point of hydrogen fluoride, and isobutyric acid is removed as a liquid of high purity from a plate below the entrance of the feed.

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