Dha enrichment process

Details Dha enrichment process Dha enrichment process

C - Chemistry, Metallurgy

11

C

C11C 1/08 (2006.01) A23D 9/007 (2006.01) B01D 11/04 (2006.01) C11B 7/00 (2006.01) C11C 1/00 (2006.01)

Patent

CA 2633770

The present invention relates to a continuous process of DHA enrichment of a solution of fatty acids or derivatives thereof comprising less than 50% of DHA relative to the total fatty acids of the solution or to derivatives thereof, wherein the process comprises the steps of (a) simultaneous countercurrent injection, into a fractionation column, of the flow of the solution of fatty acids or of derivatives thereof and of a flow of supercritical CO<SUB>2</SUB> at a temperature of less than or equal to 70°C and at a pressure of between 100×10<SUP>5</SUP> Pa and 160×10<SUP>5</SUP> Pa, wherein the level of supercritical CO<SUB>2</SUB> is between 30 and 70, and (b) recovery of the residue comprising at least 50% of DHA relative to the total fatty acids of the residue or to derivatives thereof, wherein the DHA yield is greater than or equal to 60%.

La présente invention concerne un procédé continu d'enrichissement en DHA d'une solution d'acides gras ou de ses dérivés comprenant moins de 50% de DHA par rapport aux acides gras totaux de la solution ou à leurs dérivés, le procédé comprenant les étapes de (a) injection simultanée à contre-courant dans une colonne de fractionnement du flux de la solution d'acides gras ou de ses dérivés et d'un flux de CO2 supercritique à une température inférieure ou égale à 70°C et à une pression comprise entre 100*10 5 Pa et 160 * 10 5 Pa, le taux en CO2 supercritique étant compris entre 30 et 70 et (b) récupération du résidu comprenant au moins 50% de DHA par rapport aux acides gras totaux du résidu ou à leurs dérivés, le rendement en DHA étant supérieur ou égal à 60%.

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