Quaternary Ammonium Salt Functionalized Methoxypolyethylene Glycols-Supported Phosphotungstic Acid Catalyst for the Esterification of Carboxylic Acids with Alcohols

Quaternary Ammonium Salt Functionalized Methoxypolyethylene Glycols-Supported Phosphotungstic Acid Catalyst for the Esterification of Carboxylic Acids with Alcohols
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季铵盐功能化甲氧基聚乙二醇负载磷钨酸催化剂用于羧酸与醇的酯化反应

DOI:
10.1007/s10562-013-1181-5
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发表时间:
2014-04
期刊:
影响因子:
2.8
通讯作者:
Lei, Ziqiang
Lei, Ziqiang
中科院分区:
化学4区
文献类型:
--
作者:
Yang, Zhiwang;Zhao, Lei;Lei, Ziqiang

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摘要制备了季铵盐功能化的甲氧基聚乙二醇负载磷钨酸催化剂,并用X射线衍射、傅立叶变换红外光谱和热重分析对其进行了表征。固载化磷钨酸催化剂具有良好的催化活性和选择性,是一种高效的多相催化剂,可在温和条件下催化羧酸与醇的酯化反应。该催化剂可以通过简单的分离进行分离,并且可以重复使用六次而不会显著损失催化活性和选择性。
AbstractThe quaternary ammonium salt functionalized methoxypolyethylene glycols-supported phosphotungstic acid catalyst was prepared and characterized using X-ray diffraction, fourier transform infrared spectroscopy and thermogravimetric analysis. The immobilized phosphotungstic acid catalyst exhibited excellent catalytic activity and selectivity, which was shown to be an efficient heterogeneous catalyst for catalyzing the esterification of carboxylic acids with alcohols under mild conditions. The catalyst could be separated by simple separation and can be used six times without significant losing of catalytic activity and selectivity.Graphical Abstract
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