Purifying polyunsaturated fatty acid glycerides
US6204401A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Sep 27, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/54
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A composition containing polyunsaturated fatty acid glycerides is purified by means of supercritical fluid fractionation in one or more countercurrent columns operated either with internal reflux achieved by a temperature gradient along the column or with an external reflux achieved through external regulation of the pressure, and using as the solvent a mixture of supercritical CO.sub.2 and a polar co-solvent. Oligomeric and malodorous impurities in particular can be successfully removed by this process, which also can, if desired, be followed, or preceded, by another supercritical fluid fractionation with supercritical C0.sub.2 under conditions adjusted so as to favor fractionation of the glyceride components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.