REFINING OF OIL COMPOSITION Russian patent published in 2000 - IPC

FIELD: organic chemicals. SUBSTANCE: in order to prepare cleaned product having high content of polyunsaturated fatty acids, oil composition is treated in the presence of lipase with substantially anhydrous alcohol in amount of not more than 15 molar equivalents with respect to amount of triglycerides. Lipase preferably catalyzer transesterification of saturated and monounsaturated fatty acids. The remaining fraction enriched with glycerides of polyunsaturated fatty acids is then separated. In preferred embodiments compositions with higher concentration of eicosapentaenic acid and docosahexaenic acid are prepared from fish oil. EFFECT: increased yield of polyunsaturated fatty acids. 27 cl, 6 ex, 2 dwg, 12 tbl