| 稀土催化乙酸乙酯合成反应 |
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| 引用本文： | 周媛,李婷婷,袁福根.稀土催化乙酸乙酯合成反应[J].苏州科技学院学报(自然科学版),2012,29(2):38-40. |
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| 作者姓名： | 周媛 李婷婷 袁福根 |
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| 作者单位： | 苏州科技学院化学与生物工程学院,江苏苏州,215009 |
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| 基金项目： | 苏州科技学院研究生科研创新计划项目 |
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| 摘 要： | 研究了3种四价铈化合物和3种三价铈化合物催化乙酸和乙醇合成乙酸乙酯反应的性能,发现阴离子配体对铈化合物催化活性有很大影响。催化活性顺序为:CeCl3>Ce(NO3)3>(NH4)2Ce(NO3)6>Ce(SO4)2。Ce(acac)4和Ce(acac)3则完全没有催化活性。研究了LnCl3中稀土元素对催化活性的影响,催化活性顺序为:Yb>Sm>Ce>La。YbCl3作催化剂活性较高,催化剂具有较好的重复使用性,实验过程无毒、无污染,是理想的绿色催化剂。
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| 关 键 词： | 稀土 乙酸乙酯 催化 铈 |
Synthesis of ethyl acetate catalyzed by rare earth compounds |
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| ZHOU Yuan,LI Tingting,YUAN Fugen.Synthesis of ethyl acetate catalyzed by rare earth compounds[J].Journal of University of Science and Technology of Suzhou,2012,29(2):38-40. |
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| Authors: | ZHOU Yuan LI Tingting YUAN Fugen |
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| Institution: | (School of Chemistry and Bioengineering,SUST,Suzhou 215009,China) |
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| Abstract: | The synthesis of ethyl acetate from alcohol and acetic acid has been studied with rare earth compounds as catalysts.Three tetravalent cerium compounds and three trivalent cerium compounds were selected as the catalysts.It is found that the anionic ligand has great influence upon the catalytic activity of the cerium compounds.The catalytic activity decreases in the order: CeCl3>Ce(NO3)3>(NH4)2Ce(NO3)6>Ce(SO4)2.Neither tetravalent Ce(acac)4 nor trivalent Ce(acac)3 displays their catalytic activities.For LnCl3,the rare earth element also influences the catalytic activity that decreases in the order: Yb>Sm>Ce>La.YbCl3 shows good catalytic activity for the reaction and is reusable.The catalytic process is non-toxic and non-polluting.Hence YbCl3 is an ideal green catalyst. |
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| Keywords: | rare earth ethyl acetate catalysis cerium |
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