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| 1,3-二油酸-2-棕榈酸甘油三酯的合成 |
| Synthesis of 1,3-dioleoyl-2-palmitate triglyceride |
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| DOI： |
| 中文关键词: 化学酯交换反应 酶法酸解反应 1,3-二油酸-2-棕榈酸甘油三酯 熔点 |
| 英文关键词:chemical transesterification enzymatic acidolysis reaction 1,3-dioleoyl-2-palmitate triglyceride melting point |
| 基金项目: |
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| 中文摘要: |
| 为了解决1,3-二油酸-2-棕榈酸甘油三酯（OPO）合成过程中不利于脂肪酶活性发挥的问题，采用两步法合成OPO，首先以棕榈硬脂和高油酸葵花籽油为原料通过化学酯交换反应得到相对棕榈硬脂熔点降低的油脂，再以化学酯交换油脂与油酸为原料在Lipozyme RM IM脂肪酶催化下进行酶法酸解反应得到OPO。通过单因素实验及响应面优化实验确定最优反应条件为棕榈硬脂与高油酸葵花籽油质量比2∶1、化学酯交换油脂与油酸质量比1∶1.45、酶添加量4%、反应温度50.40℃、反应时间5.29 h，该条件下OPO含量为27.26%，sn-2位棕榈酸占总棕榈酸含量为67.36%。以棕榈硬脂为原料合成OPO的新工艺一方面提升了高油酸植物油的使用价值，另一方面酶法酸解反应的温度适中，更有利于脂肪酶活性发挥。 |
| 英文摘要: |
| 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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