EXTRACTION AND WINTERIZATION OF LIPIDS FROM OILSEED AND MICROBIAL SOURCES

摘要

A process for purifying a lipid composition having predominantly neutral lipid

components having at least one long chain polyunsaturated fatty acid is
disclosed. The
process employs contacting the lipid composition with polar solvent, such as
acetone,
wherein the solvent is selected such that contaminants are less soluble in the
solvent than
in the long chain polyunsaturated fatty acid. The process is typically
conducted at cooler
temperatures, including about 0°C. Upon precipitation of the
contaminants from the lipid
composition, a separation is conducted to remove the precipitated material
from the lipid
composition. The long chain polyunsaturated fatty acids can include ARA, DPA,
EPA
and/or DHA. The process effectively winterizes lipid compositions, thereby
reducing the
tendency of such compositions to become hazy.