Patents by Inventor Xunwen Wang

Xunwen Wang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing dimethyl carbonate
    Patent number: 9765014
    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.
    Type: Grant
    Filed: September 23, 2015
    Date of Patent: September 19, 2017
    Assignee: YASHENTECH CORPORATION
    Inventors: Youqi Wang, Xunwen Wang, Zhijian Li, Hui Han
  • Process for Producing Dimethyl Carbonate
    Publication number: 20170057904
    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.
    Type: Application
    Filed: September 23, 2015
    Publication date: March 2, 2017
    Inventors: Youqi Wang, Xunwen Wang, Zhijian Li, Hui Han