公开(公告)号：US12037316B2

公开(公告)日：2024-07-16

申请号：US18254846

申请日：2022-10-11

申请人： TIANJIN UNIVERSITY OF SCIENCE & TECHNOLOGY

发明人： Hongxing Wang ,  Haiyong Li ,  Guangqiang Zheng ,  Fei Li

IPC分类号： C07C68/08 ,  C07C68/06

CPC分类号： C07C68/08 ,  C07C68/06 ,  Y02P20/10

摘要： The present disclosure discloses an energy-saving method for preparing electronic-grade carbonate, including the following steps that: industrial-grade dimethyl carbonate and anhydrous ethanol enter a reaction process after being preheated by a preheater, and are subjected to an esterification reaction under the action of a catalyst to obtain a mixture containing dimethyl carbonate, ethyl methyl carbonate and diethyl carbonate, and an azeotrope of dimethyl carbonate and methanol; the above-mentioned mixture enters a recovery process of dimethyl carbonate to recover unreacted dimethyl carbonate; a mixture of ethyl methyl carbonate and diethyl carbonate then enters a crude separation process to obtain crude ethyl methyl carbonate and crude diethyl carbonate; and the crude ethyl methyl carbonate is subjected to a refining process of ethyl methyl carbonate to obtain electronic-grade ethyl methyl carbonate, and the crude diethyl carbonate is subjected to a refining process of diethyl carbonate to obtain electronic-grade diethyl carbonate.