|
| Synthesis of diacylglycerol via glycerolysis of soybean oil catalyzed by DBU in switchable-polarity solvent system |
| |
| DOI：10.12166/j.zgyz.1003-7969/2020.05.020 |
| KeyWord:switchable-polarity solvent DBU diacylglyeride glycerolysis soybean oil |
| FundProject: |
|
| Hits: 1734 |
| Download times: 652 |
| Abstract: |
| 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. |
| View full text View/Add Comment Download reader |
| Close |
|
|
|
