Patents by Inventor Lesheng Wang

Lesheng 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).

  • Sulfur-doped porous carbon derived from heavy hydrocarbons and methods for production thereof
    Patent number: 11746020
    Abstract: Sulfur-crosslinked olefins, particularly sulfur-crosslinked heavy hydrocarbon products having one or more sulfur-crosslinked olefin moieties, may undergo pyrolysis to form sulfur-doped porous carbon having high BET surface area values. Pyrolysis to form the sulfur-doped porous carbon may be particularly efficacious in the presence of a hydroxide base. BET surface areas up to 2000 m2/g or even higher may be obtained. Such sulfur-doped porous carbon may be prepared by combining a heavy hydrocarbon product with sulfur, heating to a first temperature state to form a liquefied reaction mixture containing a sulfur-crosslinked heavy hydrocarbon, homogeneously mixing a hydroxide base with the liquefied reaction mixture, and pyrolyzing the sulfur-crosslinked heavy hydrocarbon to form sulfur-doped porous carbon.
    Type: Grant
    Filed: January 24, 2020
    Date of Patent: September 5, 2023
    Assignee: EXXONMOBIL TECHNOLOGY AND ENGINEERING COMPANY
    Inventors: Yi Du, Bradley D. Wooler, Stuart E. Smith, Brenda A. Raich, Clarence Chase, Lesheng Wang
  • SULFUR-DOPED POROUS CARBON DERIVED FROM HEAVY HYDROCARBONS AND METHODS FOR PRODUCTION THEREOF
    Publication number: 20200299141
    Abstract: Sulfur-crosslinked olefins, particularly sulfur-crosslinked heavy hydrocarbon products having one or more sulfur-crosslinked olefin moieties, may undergo pyrolysis to form sulfur-doped porous carbon having high BET surface area values. Pyrolysis to form the sulfur-doped porous carbon may be particularly efficacious in the presence of a hydroxide base. BET surface areas up to 2000 m2/g or even higher may be obtained. Such sulfur-doped porous carbon may be prepared by combining a heavy hydrocarbon product with sulfur, heating to a first temperature state to form a liquefied reaction mixture containing a sulfur-crosslinked heavy hydrocarbon, homogeneously mixing a hydroxide base with the liquefied reaction mixture, and pyrolyzing the sulfur-crosslinked heavy hydrocarbon to form sulfur-doped porous carbon.
    Type: Application
    Filed: January 24, 2020
    Publication date: September 24, 2020
    Inventors: Yi Du, Bradley D. Wooler, Stuart E. Smith, Brenda A. Raich, Clarence Chase, Lesheng Wang