| 离子液体催化合成乙酸乙酯的研究 |
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| 引用本文： | 尉志苹,王少君,曲丰作. 离子液体催化合成乙酸乙酯的研究[J]. 大连工业大学学报, 2007, 26(4) |
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| 作者姓名： | 尉志苹 王少君 曲丰作 |
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| 作者单位： | 大连工业大学,化工与材料学院,辽宁,大连,116034;大连工业大学,化工与材料学院,辽宁,大连,116034;大连工业大学,化工与材料学院,辽宁,大连,116034 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 研究了1-己基吡啶氟硼酸盐离子液体的合成及表征,并利用1-己基吡啶氟硼酸盐离子液体作溶剂和催化剂,通过酯化反应在反应精馏装置中合成乙酸乙酯.考察了回流比、进料比及离子液体用量对反应精馏的影响,并考察了离子液体的重复使用性能.结果表明,该离子液体为Lewis酸,具有催化活性,将其用于酯化反应,使选择性得到显著的提高,离子液体重复使用5次,其催化活性基本不变.适宜的反应条件(进料比)为:n(乙酸)∶n(乙醇)=1.1∶1.0,离子液体用量为n(乙酸)∶n(离子液体)=8.0∶1.0,回流比为3.0.
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| 关 键 词： | 离子液体 乙酸乙酯 催化 |
Synthesis of ethyl acetate catalyzed by ionic liquid |
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| WEI Zhi-ping,WANG Shao-jun,QU Feng-zuo. Synthesis of ethyl acetate catalyzed by ionic liquid[J]. Journal of Dalian Dalian Polytechnic University, 2007, 26(4) |
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| Authors: | WEI Zhi-ping WANG Shao-jun QU Feng-zuo |
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| Abstract: | The ionic liquid of 1-hexyl-pyridinium tetrafluoroborate(HPyBF4) was synthesized and characterized.Ethyl acetate was synthesized using HPyBF4 as catalyst and solvent in reaction distillation.The influence of reflux ratio,feed ratio, amount of HPyBF4and the recycle times of ionic liquid on catalysis activity was studied,indicated that HPyBF4,as Lewis acid,has both catalytic activity and excellent selectivity.There was no any apparent loss in the conversion and selectivity after ionic liquid was used 5 times.The optimization was: feed radio:n(acetic acid)∶n(ethanol) =1.1∶1.0,amount of HPyBF4:n(acetic acid)∶n(HPyBF4)=8.0∶1.0,reflux ratio=3.0. |
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| Keywords: | ionic liquid ethyl acetate catalyze |
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