Process for producing high purity acetic acid

Details Process for producing high purity acetic acid Process for producing high purity acetic acid

1995-06-02

1997-04-29

Geist, Gary

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

Organic compounds

Carboxylic acids and salts thereof

562608, C07C 5112

Patent

active

056250959

ABSTRACT:
A high purity acetic acid is prepared by reacting methanol with carbon monoxide in the presence of a rhodium catalyst, iodide salts, and methyl iodide, wherein an acetaldehyde concentration in the reaction liquid is maintained at 400 ppm or lower. This may be attained by contacting the liquid containing carbonyl impurities with water to separate and remove the carbonyl impurities. After that, the liquid can be returned to the reactor.

REFERENCES:
patent: 4008131 (1977-02-01), Price
patent: 4615806 (1986-10-01), Hilton
patent: 5001259 (1991-03-01), Smith et al.
patent: 5155265 (1992-10-01), Scates et al.
patent: 5214203 (1993-05-01), Koyama et al.
patent: 5371286 (1994-12-01), Blay et al.

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