PARTITION-COEFFICIENTS AND SOLUBILITY OF UREA-FRACTIONATED FATTY-ACIDETHYL-ESTERS FROM FISH-OIL IN SUPERCRITICAL CO2

Solubilities and K-values of urea-fractionated fish oil fatty acid eth yl esters, prepared from sandeel oil, have been measured in supercriti cal carbon dioxide experimentally. The measurements were performed at the temperatures of 313.2 and 343.2 K in the pressure range of 8 to 26 MPa. Experimental temperatures, pressures, and densities of the equil ibrium phases are tabulated. The K-values of the ethyl esters of docos ahexacnoic acid (DHA), eicosapentaenoic acid (EPA), and oleic acid of the urea-fractionated mixture are compared with previously published e xperimental binary and multicomponent data on the same mixture before performing the urea-fractionation. K-value data of this type are essen tial to conceive proper equipment design for separation of the various polyunsaturated omega-3 fatty acids present in fish oil as esters.