Patent · US Active

Process for producing dimethyl carbonate

US9765014B2 · kind B2 · utility

1Cited by

1References

20Claims

0Family size

Assignee

YASHENTECH CORPORATION · CN

Inventors

Youqi Wang · Shanghai, CN
Xunwen Wang · Shanghai, CN
Zhijian Li · Martinsburg, US
Hui HAN · Suzhou, CN

Key dates

Filing date	Sep 23, 2015
Grant date	Sep 19, 2017
Priority date	—
Expiry date	Sep 23, 2035

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/584
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.