文献类型：期刊文献

英文题名：The role of zinc oxide in carbonylation of ethylene glycol to ethylene carbonate with urea: A precursor for homogeneous catalyst

作者：Wang, Jianpei[1];Chen, Yanmei[1];Shen, Weihua[1];Zhu, Zhiqing[1];Xu, Yisheng[1];Fang, Yunjin[1]

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

年份：2017

卷号：89

起止页码：52

外文期刊名：CATALYSIS COMMUNICATIONS

收录：;EI(收录号：20164703027229);WOS:【SCI-EXPANDED(收录号:WOS:000390511600012)】；

基金：This work is supported by the National Natural Science Foundation of China (Project No. 21576083), and sponsored by Shanghai Pujiang Program (No. 14PJ1402400).

语种：英文

外文关键词：ZnO; Homogeneous catalysis; Urea; Ethylene glycol; Ethylene carbonate

摘要：In carbonylation of ethylene glycol to ethylene carbonate with urea catalyzed by ZnO, which was considered as a heterogeneous catalyst. ZnO is observed to be dissolved in the reactants probably due to the formation of Zn(NCO)(2)(NH3)(2) making the reaction homogeneously catalyzed. To our knowledge, it is firstly reported that the reaction experienced three states including ZnO dissolution, homogeneous catalysis, and precipitate formation. The precipitate was characterized to be a mixture containing Zn(OH)(2), ZnCO3, and Zn(NCO)(2)with a ratio of 8.5:6.1:1. Possible mechanisms of ZnO dissolution and precipitation were proposed. (C) 2016 Elsevier B.V. All rights reserved.