文献类型：期刊文献

英文题名：Synthesis of Dimethyl Carbonate by Transesterification of Methanol with Propylene Carbonate Catalyzed by Choline-Based Amino Acid Ionic Liquids

作者：Liu, Hao[1];Liu, Shiyu[1];Shen, Weihua[1];Fang, Yunjin[1]

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

年份：2025

卷号：155

期号：6

外文期刊名：CATALYSIS LETTERS

收录：;EI(收录号：20252118468144);WOS:【SCI-EXPANDED(收录号:WOS:001493123800002)】；

基金：The authors acknowledge the provision of facilities and technical support by East China University of Science and Technology at State Key Laboratory of Chemical Engineering.

语种：英文

外文关键词：Catalyst; Dimethyl carbonate synthesis; Transesterification; Choline-based amino acid ionic liquids

摘要：In this study, we developed a series of choline-based amino acid ionic liquids ([Cho][AA]-ILs) using three alkaline amino acids and choline as environmentally friendly catalysts for synthesizing dimethyl carbonate through transesterification of propylene carbonate with methanol. Through systematic screening, choline arginine ([Cho][Arg]) demonstrated superior catalytic performance and was selected for further optimization. A response surface methodology (RSM) with Box-Behnken design (BBD) was employed to systematically investigate the synergistic effects of key reaction parameters: catalyst concentration (3.6 wt%), reaction time (2.3 h), and temperature (79.4 degrees C) at a methanol to propylene carbonate molar ratio of 12:1. Under these optimized conditions, the system achieved 71.2% propylene carbonate conversion efficiency under atmospheric reflux. Notably, the catalyst exhibited remarkable recyclability, maintaining approximately 40% conversion efficiency after 12 reaction cycles. Experiments and characterizations revealed that the decomposition of guanidine groups on the arginine side chain caused by high temperature was the main reason for the deactivation of the catalyst. The [Cho][Arg] catalyst distinguishes itself through its facile single-step synthesis, low environmental toxicity, and cost-effective raw materials, demonstrating significant potential for sustainable industrial applications in carbonate ester production.