Patent ID: 9428711
Filing Date: 2016-08-30
CPC Classification: C11B,C11C

Claim Text:
1. A process for recovering a first polyunsaturated fatty acid from a feed mixture that comprises the first polyunsaturated fatty acid and at least a second fatty acid in addition to the first polyunsaturated fatty acid, the process comprising: forming a final product having the first polyunsaturated fatty acid at greater than or equal to about 90% by weight and less than or equal to about 2% by weight of the second fatty acid, wherein the forming comprises: performing a main step of chromatographic separation using an aqueous organic eluent and thereby collecting a first stream of eluent enriched in the first polyunsaturated fatty acid and a second stream of eluent enriched in the second fatty acid; subjecting the second stream of eluent to a partial concentration step so as to obtain a concentrated portion of the second stream comprising the second fatty acid and a depleted portion of the second stream comprising the eluent, but depleted of the second fatty acid; and at least partially recycling the depleted portion of the second stream to use it in the main step of chromatographic separation.