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| 极性转换溶剂体系中DBU催化大豆油甘油解制备甘油二酯的研究 |
| Synthesis of diacylglycerol via glycerolysis of soybean oil catalyzed by DBU in switchable-polarity solvent system |
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| DOI：10.12166/j.zgyz.1003-7969/2020.05.020 |
| 中文关键词: 极性转换溶剂 DBU 甘油二酯 甘油解 大豆油 |
| 英文关键词:switchable-polarity solvent DBU diacylglyeride glycerolysis soybean oil |
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| 中文摘要: |
| 以DBU为催化剂和反应溶剂，在极性转换溶剂体系下催化大豆油甘油解制备甘油二酯。通过单因素试验得到最佳反应条件为：以略多于DBU摩尔数的乙醇为极性转换溶剂，大豆油与甘油摩尔比2∶ 1，DBU与甘油摩尔比2.5∶ 1，反应时间25 min，反应温度130 ℃。在最佳反应条件下，产物中甘油二酯的含量为67.6%，其中1,2-甘油二酯占89.7%，1,3-甘油二酯占10.3%。常温常压条件下通入CO2，以及加热条件下通氮气移除CO2的方法能可逆地调节催化剂DBU的极性，从而促进其与产物的分离；催化剂DBU重复使用5次，产物中甘油二酯的含量变化不大。 |
| 英文摘要: |
| With DBU as catalyst and reaction solvent, the diacylglyceride (DAG) was synthesized by glycerolysis of soybean oil in switchable-polarity solvent system. The glycerolysis conditions were optimized by single factor experiment as follows: with slightly more ethanol than DBU moles as switchable-polarity solvent, molar ratio of soybean oil to glycerol 2∶ 1, molar ratio of DBU to glycerol 2.5∶ 1, reaction time 25 min and reaction temperature 130 ℃.Under the optimal conditions,the content of DAG in the product could reach 67.6%,in which 1,2-DAG accounted for 89.7%and 1,3-DAG accounted for 10.3%. The polarity of the catalyst DBU could be reversibly regulated by introducing carbon dioxide via normal temperature and pressure conditions and removing carbon dioxide via bubbling nitrogen with heating respectively, thereby promoting its separation from the DAG product. There was no obvious change of DAG in the product when DBU was used for five times. |
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