High-content conjugated linoleic acid triglyceride and preparation method thereof

The invention relates to preparation of conjugated linoleic acid triglyceride, particularly to high-content conjugated linoleic acid triglyceride and a preparation method thereof. According to the invention, the linoleic acid content is increased to more than 95% by using a crystallization purification method before isomerization of safflower oil methyl ester, and then high-purity and high-contentconjugated linoleic acid triglyceride is obtained through an esterification reaction; the method is simple in process, does not need an alkali catalytic transposition step, can greatly reduce the loss of conjugated linoleic acid in a purification process compared with the traditional process, and reduces the cost; the process sequentially comprising linoleic acid purification and conjugation canensure that the ratio of two isomers (c9, t11-CLA) and (t10, c12-CLA) of conjugated linoleic acid triglyceride is kept at 1:1; and based on the purification method combining crystallization purification and high-vacuum rectifi