Patents by Inventor Qinghong Xu

Qinghong Xu 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).

  • Patent number: 8541332
    Abstract: Disclosed is a catalyst for the polymerization of olefins comprising thienyl-substituted silanes, which comprises a solid titanium catalyst component containing titanium, magnesium and a halogen as the main components, an alkylaluminum compound, and a component of organosiloxane compound comprising two thienyl as substituents represented by general formula (I). The molar ratio of each catalyst component is 1:50-150:5-50 based on titanium:aluminum:silicon. When the catalyst is used in the polymerization of propylene, the polymerisate obtained has a very high degree of isotacticity, and the yield is high.
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: September 24, 2013
    Assignee: PetroChina Company Limited
    Inventors: Zhifei Li, Kuilong Tan, Hao Wang, Jianjun Yi, Qinghong Xu, Weisong Cui, Wei Bai, Xinyuan Liu, Pu Xu, Wanqing Ju
  • Publication number: 20130131292
    Abstract: Disclosed is a catalyst for the polymerization of olefins comprising thienyl-substituted silanes, which comprises a solid titanium catalyst component containing titanium, magnesium and a halogen as the main components, an alkylaluminum compound, and a component of organosiloxane compound comprising two thienyl as substituents represented by general formula (I). The molar ratio of each catalyst component is 1:50-150:5-50 based on titanium:aluminum:silicon. When the catalyst is used in the polymerization of propylene, the polymerisate obtained has very high degree of isotacticity, and the yield is high.
    Type: Application
    Filed: June 3, 2011
    Publication date: May 23, 2013
    Applicant: PetroChina Company Limited
    Inventors: Zhifei Li, Kuilong Tan, Hao Wang, Jianjun Yi, Qinghong Xu, Weisong Cui, Wei Bai, Xinyuan Liu, Pu Xu, Wanqing Ju
  • Patent number: 5852168
    Abstract: The present invention provides a method for sulfurizing a phosphorus-containing compound, such as a trivalent phosphorus compound, using a disulfide-containing five-membered heterocycle.
    Type: Grant
    Filed: April 30, 1996
    Date of Patent: December 22, 1998
    Assignees: Regents of the University of Minesota, The Board of Supervisors of LA State University
    Inventors: George Barany, Robert P. Hammer, Karin Musier-Forsyth, Qinghong Xu, Lin Chen