Preparation of carboxylic acids by carbonylation of alcohols
US4426537A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 5, 1981 |
| Grant date | Jan 17, 1984 |
| Priority date | — |
| Expiry date | May 5, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/12
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
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 phenyl-C.sub.n H.sub.2n -radical wherein 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 lanthanide salt, 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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.