Process for the preparation of carboxylic acids from organic halides
US4034004A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1975 |
| Grant date | Jul 5, 1977 |
| Priority date | — |
| Expiry date | Jun 10, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/96
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for preparing carboxylic acids by reaction of carbon monoxide with aromatic and aliphatic organic halides, optionally further substituted by groups inert under the reaction conditions, and catalyzed by phosphinic palladium complexes and in the presence of quaternary alkyl-ammonium salts, characterized in that said process is conducted in a double liquid phase consisting essentially of (a) the organic halide and the catalytic palladium complex or their solutions in at least one hydrocarbon solvent immiscible with H.sub.2 O, and (b) an aqueous inorganic alkaline solution containing the quaternary alkyl-ammonium salt, at a temperature between about 50.degree. and 150.degree. C. More particularly, the reaction is conducted in the presence of at least one catalyst selected from among: PA1 A. at least one palladium complex of the formula: EQU Pd[P(R).sub.3 ].sub.m wherein m is a whole number from 2 to 4, and (R).sub.3 represents a homogeneous or a heterogeneous group consisting of phenyl and/or alkyl radicals which may also be further substituted by inert groups; PA1 B. at least one palladium complex of the general formula: EQU Pd[P(R).sub.2 -- (CH.sub.2).sub.n -- P(R).sub.2 ].…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.