Process for the preparation of mono- and dicarboxylic acids from unsaturated fatty acids and/or their derivatives
US5864049A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1997 |
| Grant date | Jan 26, 1999 |
| Priority date | — |
| Expiry date | Sep 23, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/285
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the preparation of carboxylic acids from unsaturated fatty acids and/or their derivatives. The process of the invention is characterized in that it comprises the following stages: PA1 a stage which consists in oxidizing an unsaturated fatty acid in the form of acid and/or of ester using hydrogen peroxide, in the presence of a metal oxide or of a carboxylic acid optionally used in combination with a ruthenium-based catalyst, PA1 a stage which consists in reacting the reaction mixture originating from the preceding stage with nitric acid in the presence of a vanadium-based catalyst, optionally used in combination with a cocatalyst, and then PA1 a stage of recovery of the mono- and dicarboxylic acids. It is particularly well suited for the preparation of saturated mono- and dicarboxylic acids obtained from unsaturated fatty acids such as oleic acid or from oils and fats.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.