Patent ID: 11898120
Assignee: NISSUI CORPORATION
Field: Chemical engineering (Chemistry)
Classification: CPC C  A  B | IPC B  C

Claim 0:
1. A method for producing a composition containing a highly unsaturated fatty acid or an alkyl ester thereof, which comprises:
(1) alkyl esterifying a raw material containing a triglyceride comprising a highly unsaturated fatty acid as constituent fatty acid to prepare a composition containing a highly unsaturated fatty acid alkyl ester;
(2) distilling the composition resulting from step (1) and collecting the main distillate fraction, thereby obtaining a composition comprising 50% by weight or more of fatty acid or fatty acid alkyl esters, wherein the concentration of 3-MCPD as found upon analyzing the main distillate fraction by American Oil Chemists' Society official method Cd 29b-13 assay A is less than 1.80 ppm.