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| Synthesis of methyl oleate by esterification of oleic acid with L-aspartic acid ionic liquid as catalyst |
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| DOI：10.12166/j.zgyz.1003-7969/2020.06.010 |
| KeyWord:L-aspartic acid ionic liquid esterification reaction methyl oleate oleic acid |
| FundProject:：云南省国际科技特派员项目（2015IA022）；云南省农村能源工程重点实验室基金项目（2017KF03）；云南师范大学大学生科学研究训练项目（ky2017-137，ky2018-142）；云南师范大学2017年度省级大学生创新创业训练计划项目 |
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| Abstract: |
| An acid ionic liquid\[Asp\]HSO4 was prepared by one-step synthesis with L-aspartic acid as raw material and used to catalyze the esterification of oleic acid to synthesize methyl oleate. The effects of catalyst dosage, molar ratio of methanol to oleic acid, reaction temperature and reaction time on the esterification were investigated,and the recycling performance of the ionic liquid was also investigated. The results showed that the optimal conditions of \[Asp\]HSO4catalyzed esterification of oleic acid were obtained as follows:\[Asp\]HSO4dosage 20% of oleic acid mass, molar ratio of methanol to oleic acid 7∶ 1, reaction temperature (85±2)℃ and reaction time 24 h. Under these conditions, the esterification rate reached 97.72%. The ionic liquid was easily separated from the product after reaction. The ionic liquid \[Asp\]HSO4was repeatedly used for four times, and it still had high catalytic activity with the esterification rate 96.93%. |
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