METHOD FOR PRODUCING COMPOSITION CONTAINING HIGHLY UNSATURATED FATTY ACID ALKYL ESTER

摘要

The present invention provides a composition having a high content of highly unsaturated fatty acid alkyl ester. A method for producing a composition comprising a highly unsaturated fatty acid alkyl ester, the method comprising contacting a raw material comprising a highly unsaturated fatty acid alkyl ester with an aqueous solution comprising a silver salt and subsequently recovering an aqueous phase; adding an organic solvent to the aqueous phase, and subsequently recovering an organic solvent phase; and rectifying the organic solvent phase at a temperature of 170 to 190° C. and a column top vacuum degree of 1 Pa or less to recover the highly unsaturated fatty acid alkyl ester from the organic solvent phase.

主权项

1. A method for producing a composition comprising a highly unsaturated fatty acid alkyl ester, the method comprising:
(1) contacting a raw material comprising a highly unsaturated fatty acid alkyl ester with an aqueous solution comprising a silver salt, and subsequently recovering an aqueous phase; (2) adding an organic solvent to the aqueous phase, and subsequently recovering an organic solvent phase; and (3) rectifying the organic solvent phase at a temperature of 170 to 190° C. and a column top vacuum degree of 1 Pa or less to recover the highly unsaturated fatty acid alkyl ester from the organic solvent phase.