Patents by Inventor S. Gary Yu

S. Gary Yu 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).

  • Hydroprocessing catalyst fines as a first-stage catalyst in a two-stage, close-coupled thermal catalytic hydroconversion process
    Patent number: 4761220
    Abstract: A process for the production of transportation fuels from heavy hydrocarbonaceous feedstock is provided comprising a two-stage, close-coupled process, wherein the first stage comprises a hydrothermal zone into which is introduced a mixture comprising a feedstock and finely ground hydroprocessing catalyst having coke-suppressing and demetalizing activity, and hydrogen; and the second, close-coupled stage comprises a hydrocatalytic zone into which substantially all the effluent from the first stage is directly passed and processed under hydrocracking conditions. The first-stage ground catalyst may also be spent catalyst from which most metals have been removed.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: August 2, 1988
    Assignee: Chevron Research Company
    Inventors: Samil Beret, S. Gary Yu, C. Richard Hsieh
  • Presulfided red mud as a first-stage catalyst in a two-stage, close-coupled thermal catalytic hydroconversion process
    Patent number: 4560465
    Abstract: A process for the production of transportation fuels from heavy hydrocarbonaceous feedstock is provided comprising a two-stage, close-coupled process, wherein the first stage comprises a hydrothermal zone into which is introduced a mixture comprising a feedstock and dispersed activated or presulfided red mud having demetalizing and coke-suppressing activity, and hydrogen; and the second, close-coupled stage comprises a hydrocatalytic zone into which substantially all the effluent from the first stage is directly passed and processed under hydrocatalytic conditions.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: December 24, 1985
    Assignee: Chevron Research Company
    Inventors: S. Gary Yu, John G. Reynolds
  • Metals-impregnated red mud as a first-stage catalyst in a two-stage, close-coupled thermal catalytic hydroconversion process
    Patent number: 4559130
    Abstract: A process for the production of transportation fuels from heavy hydrocarbonaceous feedstock is provided comprising a two-stage, close-coupled process, wherein the first stage comprises a hydrothermal zone into which is introduced a mixture comprising a feedstock and metals-impregnated red mud having coke-suppressing and demetalizing activity, and hydrogen; and the second, close-coupled stage comprises a hydrocatalytic zone into which substantially all the effluent from the first stage is directly passed and processed under hydrocatalytic conditions. The preferred metals for impregnation include transition metals, in particular, nickel and molybdenum.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: December 17, 1985
    Assignee: Chevron Research Company
    Inventors: John G. Reynolds, S. Gary Yu, Samil Beret
  • Red mud as a first-stage catalyst in a two-stage, close-coupled thermal catalytic hydroconversion process
    Patent number: 4559129
    Abstract: A process for the production of transportation fuels from heavy hydrocarbonaceous feedstock is provided comprising a two-stage, close-coupled process, wherein the first stage comprises a hydrothermal zone into which is introduced a mixture comprising a feedstock and red mud having coke-suppressing and demetalizing activity, and hydrogen; and the second, close-coupled stage comprises a hydrocatalytic zone into which substantially all the effluent from the first stage is directly passed and processed under hydrocracking conditions.
    Type: Grant
    Filed: August 27, 1984
    Date of Patent: December 17, 1985
    Assignee: Chevron Research Company
    Inventors: John G. Reynolds, S. Gary Yu, Robert T. Lewis