Preparation of carboxylic acids by carbonylation of alcohols

Details Preparation of carboxylic acids by carbonylation of alcohols Preparation of carboxylic acids by carbonylation of alcohols

1981-03-26

1982-09-28

Garner, Vivian

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

Organic compounds

Carboxylic acids and salts thereof

562406, 562497, 562517, C07C 5112, C07C 5308, C07C 53134, C07C 5730

Patent

active

043519539

ABSTRACT:
Carboxylic acids having the structural formula R.sup.1 COOH, wherein R.sup.1 is a linear, branched or cyclic chain alkyl radical of from 1 to 6 carbon atoms or a .PHI.--C.sub.n H.sub.2n -- radical wherein .PHI. is phenyl and 1.ltoreq.n.ltoreq.6, are prepared by carbonylating an alcohol having the formula R.sup.1 --OH with carbon monoxide in liquid phase, in the presence of a catalytically effective amount of nickel and an alkyl or acyl halide promoter therefor, at a temperature of at least about 120.degree. C. and under a total pressure of less than 200 bars, and said carbonylation being carried out in the presence of at least one chromium salt in which the chromium is in a state of oxidation (p) of greater than zero (p>0), and in an initial carboxylic acid reaction medium having the formula R.sup.2 --COOH, wherein R.sup.2 is defined as was R.sup.1 above, and further wherein R.sup.1 and R.sup.2 may be the same or different.

REFERENCES:
patent: 4133963 (1979-01-01), Holmes

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