3Haraldsson G. Separation of saturated/ unsaturated fatty acids[J]. J. Am. Oil Chem. Soc., 1984,61:219～222.
4Triedrich J P, Pryde E H. Supercritical CO2 extraction of lipid bearing materials and characterization of the products[J]. J. Am. Oil Chem. Soc., 1984,61:223～228.
5Aurelia Maza, Livingston N J. Process for Separating Mixed Fatty Acids from Deodorizer Distillate Using Urea. United States Patent, 5,078,920.1992～07.
