Preparing carboxylic acids or esters by oxidative cleavage of unsaturated fatty acids or esters
US5336793A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1992 |
| Grant date | Aug 9, 1994 |
| Priority date | — |
| Expiry date | Dec 10, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/333
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method of preparing carboxylic acids or esters thereof by the oxidative cleavage of unsaturated fatty acids or esters thereof is carried out in a two-phase aqueous-organic system in which the organic phase contains the unsaturated fatty acid and/or the esters thereof and the aqueous phase contains hydrogen peroxide. The oxidative cleavage is carried out in the presence of a catalytic system including a catalyst belonging to the group constituted by tungstic and molybdic acids and alkaline salts thereof, and an onium salt which acts as a phase-transfer agent for the catalyst, and has the formula: EQU (R.sub.2 R.sub.3 R.sub.4 R.sub.5 M).sup.+ Y.sup.- in which R.sub.2, R.sub.3, R.sub.4 and R.sub.5 represent hydrocarbon groups of which at least one must have more than 10 carbon atoms, EQU M is N or P, and EQU Y.sup.- is an inorganic anion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.