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| Synthesis of 1,3-dioleoyl-2-palmitate triglyceride |
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| DOI： |
| KeyWord:chemical transesterification enzymatic acidolysis reaction 1,3-dioleoyl-2-palmitate triglyceride melting point |
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| Abstract: |
| To solve the problem that is not conducive of lipase activity during the synthesis of 1,3-dioleacid-2-palmitate triglyceride(OPO), OPO was synthesized through two steps. First, the oil with a lower melting point relative to palm stearin was obtained through chemical transesterification from palm stearin and high oleic sunflower seed oil, and then the transesterificated oil and oleic acid were used as raw materials for enzymatic acidolysis reaction under the catalysis of Lipozyme RM IM lipase. The optimal reaction conditions were obtained by single factor experiment and response surface methodology as follows: mass ratio of palm stearin to high oleic acid sunflower seed oil 2∶1, mass ratio of transesterificated oil to oleic acid 1∶1.45, enzyme addition amount 4%, reaction temperature 50.40℃ and reaction time 5.29 h. Under the optimal conditions, OPO content was 27.26%, the content of sn-2 palmitic acid in total palmitic acid was 67.36%. The new process for synthesis of OPO from palm stearin improves the use value of high oleic vegetable oil, and the temperature of enzymatic acidolysis reaction is moderate, which is more conducive to the activity of lipase. |
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