Preparation of supported ionic liquid [HSO3-BMIM][HSO4]/SiO2 and its catalytic property in the esterification of acetic acid and ethanol

被引：0

作者：

He R. ^{[1
]}

Zou Y. ^{[1
]}

Shi M. ^{[1
]}

Li Y. ^{[1
]}

Xu J. ^{[1
]}

Tong Z. ^{[1
]}

机构：

[1] Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Guangxi, Nanning

来源：

Huagong Xuebao/CIESC Journal | 2022年 / 73卷 / 09期

关键词：

catalyst; esterification; ethyl acetate; immobilization; ionic liquid; supported acid;

D O I：

10.11949/0438-1157.20220456

中图分类号：

学科分类号：

摘要：

In order to make the ionic liquids (ILs) easier to separate and recycle while maintaining the catalytic activity, and to reduce the corrosion, a variety of supported ILs were prepared to catalyze the esterification for the synthesis of ethyl acetate (EtAc). The supported ILs are analyzed and characterization by infrared spectroscopy, thermogravimetric, nitrogen adsorption-desorption and scanning electron microscopy. It is found that sol-gel method can immobilize ILs on SiO2 more effectively than impregnation. In the conditions of RA0∶E = 1, T in the range of 323.15—338.15 K, and xcat∶HAc in the range of 5%—15%, the supported IL [HSO3-BMIM] [HSO4]/SiO2 which prepare by sol-gel method shows fast reaction rate, the conversion of acetic acid (XHAc) exceeds 50% at the first 30 min, which achieves 70% of the equilibrium conversion (XHAc = 68%). The LHHW model was used to fit the rate of [HSO3-BMIM] [HSO4]/SiO2-catalyzed esterification reaction, and the results showed that the model predicted accurately. The repeatability experimental result showed that XHAc (t = 4 h) of [HSO3-BMIM][HSO4]/SiO2 in the third run exceeded 60%, which decreased at the 6th run. The catalytic activity and stability of supported IL prepared by sol-gel method are better than that of impregnation. These results show that sol-gel method is more suitable for the preparation of supported ILs. © 2022 Chemical Industry Press. All rights reserved.

引用

页码：3880 / 3894

页数：14

共 46 条

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