Patents by Inventor Qianwen Zhang

Qianwen Zhang 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).

  • Catalyst for selective hydrogenation, its preparation process and application
    Patent number: 6797669
    Abstract: A catalyst for selective hydrogenation of alkynes and dienes, its preparation process and application. The catalyst has an inorganic oxide support, a major active component palladium, and a Group IB metal promoter. The active components are uniformly distributed in the catalyst body within the thickness between the support surface and the depth of more than 300 &mgr;m. The catalyst of the present invention has high activity, high selectivity, ability to resist sulfur and arsenic poisoning. The catalyst is particularly applicable to C2-C3 fraction with any concentrations of hydrogen and CO.
    Type: Grant
    Filed: December 27, 2001
    Date of Patent: September 28, 2004
    Assignees: China Petroleum & Chemical Corporation, Beijing Research Institute of Chemical Industry, China Petroleum & Chemical Corporation
    Inventors: Qianwen Zhang, Han Zhang
  • Catalyst for selective hydrogenation, its preparation process and application
    Publication number: 20020165092
    Abstract: The present invention relates to a catalyst for selective hydrogenation of alkynes and dienes, its preparation process and application. The catalyst has an inorganic oxide support, a major active component palladium, and a Group IB metal promoter. The active components are uniformly distributed in the catalyst body within the thickness between the support surface and the depth of more than 300 &mgr;m. The catalyst of the present invention has high activity, high selectivity, ability to resist sulfur and arsenic poisoning. The catalyst is particularly applicable to C2-C3 fraction with any concentrations of hydrogen and CO.
    Type: Application
    Filed: December 27, 2001
    Publication date: November 7, 2002
    Inventors: Qianwen Zhang, Han Zhang