Patents by Inventor Dongmao Zhu

Dongmao Zhu 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 selective disproportionation of toluene and disproportionation and transalkylation of toluene and C9+ aromatics
    Patent number: 6774273
    Abstract: The present invention relates to a process for the selective disproportionation of toluene and the disproportionation and transalkylation of toluene and C9+ aromatics to mainly solve the problems in the prior arts of the great amount of recycle stream, high energy consumption or harsh requirement for the reaction feedstocks. The present invention has better solved these problems by the technical solution using a process for selective disproportionation of toluene to produce mixed xylenes containing a high concentration of p-xylene, and subsequent disproportionation and transalkylation of C9+ aromatics and toluene to produce benzene and the mixed xylenes which are in the thermodynamic equilibrium. The process is applicable to the industrial production.
    Type: Grant
    Filed: October 22, 2002
    Date of Patent: August 10, 2004
    Assignee: China Petroleum & Chemical Corporation
    Inventors: Zaiku Xie, Weisheng Yang, Dejin Kong, Dongmao Zhu
  • Process for selective disproportionation of toluene and disproportionation and transalkylation of toluene and C9+ aromatics
    Publication number: 20030130549
    Abstract: The present invention relates to a process for the selective disproportionation of toluene and the disproportionation and transalkylation of toluene and C9+ aromatics to mainly solve the problems in the prior arts of the great amount of recycle stream, high energy consumption or harsh requirement for the reaction feedstocks. The present invention has better solved these problems by the technical solution using a process for selective disproportionation of toluene to produce mixed xylenes containing a high concentration of p-xylene, and subsequent disproportionation and transalkylation of C9+ aromatics and toluene to produce benzene and the mixed xylenes which are in the thermodynamic equilibrium. The process is applicable to the industrial production.
    Type: Application
    Filed: October 22, 2002
    Publication date: July 10, 2003
    Applicants: China Petroleum & Chemical Corporation, Shanghai Research Institute of Petrochemical Technology
    Inventors: Zaiku Xie, Weisheng Yang, Dejin Kong, Dongmao Zhu