Dha enrichment process

Abstract

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 2 at a temperature of less than or equal to 70° C. and at a pressure of between 100×10 5 Pa and 160×10 5 Pa, wherein the level of supercritical CO 2 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%.

1 . A solution of fatty acid ethyl esters containing at least 50% DHA obtained by a continuous process of DHA enrichment of a solution of fatty acids or of derivatives thereof comprising less than 50% DHA relative to the total fatty acids of the solution or to the derivatives thereof, wherein the process comprises the steps of
 (a) simultaneous countercurrent injection, into a fractionating column of the flow of the solution of fatty acids or of derivatives thereof and of a flow of supercritical CO 2  at a temperature of less than or equal to 70° C. and at a pressure between 100*10 5  Pa and 160*10 5  Pa, wherein the level of supercritical CO 2  is between 30 and 70 and   (b) recovery of the residue comprising at least 50% 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%.   
     
     
         2 . A medicinal product comprising a solution of fatty acid ethyl esters according to  claim 1 .