Multi-step separation process
US10179759B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 20, 2017 |
| Grant date | Jan 15, 2019 |
| Priority date | — |
| Expiry date | Jan 20, 2037 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23D9/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
The present invention provides a chromatographic separation process for recovering a polyunsaturated fatty acid (PUFA) product from a feed mixture, which comprises: (a) purifying the feed mixture in a first chromatographic separation step using an eluent a mixture of water and a first organic solvent, to obtain an intermediate product; and (b) purifying the intermediate product in a second chromatographic separation step using as eluent a mixture of water and a second organic solvent, to obtain the PUFA product, wherein the second organic solvent is different from the first organic solvent and has a polarity index which differs from the polarity index of the first organic solvent by between 0.1 and 2.0, wherein the PUFA product is other than alpha-linolenic acid (ALA), gamma-linolenic acid (GLA), linoleic acid, an ALA mono- di- or triglyceride, a GLA mono- di- or triglyceride, a linoleic acid mono- di- or triglyceride, an ALA C1-C4 alkyl ester, a GLA C1-C4 alkyl ester or a linoleic acid C1-C4 alkyl ester or a mixture thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.