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

Claim 1:
2. The method according to claim 1, wherein the composition resulting from step (1) is subjected to at least one step selected from (a)-(c) prior to step (2):
(a) reducing a monoacyl glycerol concentration in the composition prepared in step (1) to less than 10,000 ppm, wherein the monoacyl glycerol comprises as constituent fatty acid a fatty acid that has 5 or more carbon atoms fewer than the highly unsaturated fatty acid that constitutes the highly unsaturated fatty acid alkyl ester to be enriched in the composition prepared in step (1),
(b) reducing an iron concentration in the composition prepared in step (1) to less than 0.20 ppm, and
(c) reducing a chlorine concentration in the composition prepared in step (1) to less than 10 ppm.