公开(公告)号：US09765014B2

公开(公告)日：2017-09-19

申请号：US14863328

申请日：2015-09-23

Applicant: YASHENTECH CORPORATION

Inventor： Youqi Wang ,  Xunwen Wang ,  Zhijian Li ,  Hui Han

IPC: C07C68/06 ,  C07C68/00 ,  C07C68/08 ,  C07D317/36

CPC classification number: C07C68/065 ,  C07C68/00 ,  C07C68/08 ,  C07D317/36 ,  Y02P20/584 ,  C07C69/96

Abstract: The present disclosure provides a process for 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.

公开(公告)号：US20170057904A1

公开(公告)日：2017-03-02

申请号：US14863328

申请日：2015-09-23

Applicant: YASHENTECH CORPORATION

Inventor： Youqi Wang ,  Xunwen Wang ,  Zhijian Li ,  Hui Han

IPC: C07C68/06

CPC classification number: C07C68/065 ,  C07C68/00 ,  C07C68/08 ,  C07D317/36 ,  Y02P20/584 ,  C07C69/96

Abstract: The present disclosure provides a process for 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.

Abstract translation: 本公开提供了一种生产具有高转化率的碳酸二甲酯的方法。 亚烷基二醇通过醇解反应与脲反应生成碳酸亚烷基酯和氨。 产生的碳酸亚烃酯通过酯交换反应与甲醇反应生成碳酸二甲酯。 在将碳酸二甲酯与混合物分离之前，基本上除去了含氮杂质。 未反应的原料和催化剂在该过程中循环使用。