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| L-天冬氨酸离子液体催化油酸酯化反应合成油酸甲酯的研究 |
| 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 |
| 中文关键词: L-天冬氨酸 离子液体 酯化反应 油酸甲酯 油酸 |
| 英文关键词:L-aspartic acid ionic liquid esterification reaction methyl oleate oleic acid |
| 基金项目:：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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| 中文摘要: |
| 以L-天冬氨酸为原料，采用一步合成法制备了酸性离子液体\[Asp\]HSO4，并用其催化油酸进行酯化反应合成油酸甲酯。考察了离子液体\[Asp\]HSO4用量、醇酸物质的量比、反应温度和反应时间对油酸酯化反应的影响，同时考察了该离子液体的重复使用性能。结果表明：离子液体\[Asp\]HSO4催化油酸酯化的最适条件为催化剂\[Asp\]HSO4用量为油酸质量的20%、醇酸物质的量比7∶ 1、反应温度（85±2）℃、反应时间24 h，在此条件下酯化率可达97.72%。反应结束后离子液体与酯化产物容易分离，离子液体\[Asp\]HSO4重复使用4次，酯化率为96.93%，仍有较高的催化活性。 |
| 英文摘要: |
| 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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