Process for recovering unsaturated fatty acids and derivatives thereof
US5777141A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1996 |
| Grant date | Jul 7, 1998 |
| Priority date | — |
| Expiry date | Aug 16, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A process for the recovery of unsaturated fatty acids with at least 16 carbon atoms in the molecule or a derivative of such a fatty acid from a mixture of fatty acids and/or fatty acid derivatives by column chromatography with supercritical or liquid carbon dioxide as the mobile phase comprises using aluminum oxide, optionally pretreated with alkali, as the stationary phase. The pre-treatment of the aluminum oxide is conveniently effected by contacting the particulate aluminum oxide with an aqueous solution of an alkali metal or alkaline earth metal hydroxide, optionally supplemented with a water-miscible or water-soluble organic solvent, in the pH range of about 10 to about 13 over several hours. The unsaturated fatty acids or fatty acid derivatives produced chromatographically in this manner are suitable as valuable active agents in the fields of nutrition and medicine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.