文献类型：期刊文献

英文题名：Deactivation Mechanism of an Ionic Liquid Catalyst in Transesterification to Dimethyl Carbonate

作者：Ma, Junteng[1];Shen, Weihua[1];Wei, Wenxuan[1];Fang, Yunjin[1]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：45

期号：10

起止页码：1842

外文期刊名：CHEMICAL ENGINEERING & TECHNOLOGY

收录：;EI(收录号：20223612680476);WOS:【SCI-EXPANDED(收录号:WOS:000844146100001)】；

基金：This work is supported by the Natural Science Basic Research Program of Shaanxi - Shaanxi Coal and Chemical Industry Joint Foundation (Program No. 2019JLM-20) and by the National Natural Science Foundation of China (Project No. 21576083).

语种：英文

外文关键词：Dimethyl carbonate; Ionic liquid catalyst; Propylene carbonate; Transesterification

摘要：The catalytic activity of an ionic liquid catalyst decreased during the transesterification of propylene carbonate (PC) with methanol to dimethyl carbonate (DMC). The interaction between the strong basic sites of ionic liquid catalyst and carbonyl compounds of PC and/or DMC was considered to attribute to this deactivation. The presence of H2O accelerated this process by the formation of OH-. The strong basic ionic liquid reacted with the trace amount of H2O in the reaction system to generate OH-, which then reacted with the carbonyl structure in PC and/or DMC to form the inactive compound HCO3-, resulting in the deactivation of the ionic liquid catalyst. A plausible mechanism was proposed for the deactivation of the ionic liquid catalyst in this reaction.