Direction esterification of bio-based succinate catalyzed by solid super acid SO42-/ZrO2

被引：0

作者：

Yin K. ^{[1
]}

Wang Y. ^{[1
]}

Gu B. ^{[1
]}

Shen J. ^{[1
]}

机构：

[1] College of Chemical Engineering and Technology, Taiyuan University of Technology, Shanxi, Taiyuan

来源：

Huagong Jinzhan/Chemical Industry and Engineering Progress | 2023年 / 42卷 / 10期

关键词：

carbon dioxide; catalyst; esterification; reactivity;

D O I：

10.16085/j.issn.1000-6613.2022-2139

中图分类号：

学科分类号：

摘要：

The preparation of succinic acid by biological fermentation instead of petroleum-based method has attracted wide attention because of its cheap raw materials and low environmental impact. However, most product by biological fermentation is succinate. Therefore, it is often necessary to acidify succinate with inorganic acid. With CH3OH and CO2 as esterification reagents, disodium succinate can be directly esterified to dimethyl succinate without using of inorganic acid, and the generated carbonate can be used to fix carbon dioxide and adjust the pH of biological fermentation broth. Herein, this paper systematically investigated the catalytic performance of different molecular sieves for this reaction and explored their deactivation reasons. Due to the easy deactivation and low acid content of molecular sieves, solid superacid SO42-/ZrO2 was used to improve the reaction. X-ray diffractometer, specific surface area and porosity analyzer, thermal gravimetric analyzer, X-ray photoelectron spectroscopy, temperature programmed chemisorption instrument were used to investigate the effects of calcining temperature and concentration of dipping solution on the direct esterification of disodium succinate catalyzed by SO42-/ZrO2 to prepare dimethyl succinate, and the cycle stability of the catalyst. The results showed that under the preparation conditions of H2SO4 concentration of 2mol/L and calcination temperature of 550℃, the prepared SO42-/ZrO2 catalyst had excellent catalytic activity, and the yield and selectivity of dimethyl succinate were 89.25% and 93.56%, respectively. In addition, the catalyst remained high catalytic activity after being used for five times without any treatments, indicating its good stability. © 2023 Chemical Industry Press. All rights reserved.

引用

页码：5213 / 5222

页数：9

共 42 条

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