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1. (WO2017035734) PROCESS FOR PRODUCING DIMETHYL CARBONATE

Pub. No.:    WO/2017/035734    International Application No.:    PCT/CN2015/088601
Publication Date: Fri Mar 10 00:59:59 CET 2017 International Filing Date: Tue Sep 01 01:59:59 CEST 2015
IPC: C07C 68/06
C07C 68/00
C07C 69/96
Applicants: YASHENTECH CORPORATION
Inventors: WANG, Youqi
WANG, Xunwen
LI, Zhijian
HAN, Hui
Title: PROCESS FOR PRODUCING DIMETHYL CARBONATE
Abstract:
A process is provided f or producing dimethyl carbonate with high conversion rate. Alkylene glycol reacts with urea via alcohylysis reaction to produce alkylene carbonate and ammonia. The alkylene carbonate produced reacts with methanol via transesterification reaction to produce dimethyl carbonate. Before the dimethyl carbonate is separated from the mixture, the nitrogen-containing impurities are substantially removed. Unreacted feedstock and catalysts are recycled in the process.