Patents by Inventor Hyung-Jae A. Yoon

Hyung-Jae A. Yoon 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 reverse gas flow in hydroprocessing reactor systems
    Patent number: 6200462
    Abstract: A process for reverse gas flow to obtain high conversion, selective hydrotreating and product selectivity in hydroprocessing reactor systems is disclosed. In the integrated process, hydrogen recovered from a hydrotreating reactor is purified and used as a source of hydrogen for a hydrocracking reaction zone. Hydrogen recovered from the hydrocracking reaction zone is recovered without substantial cooling and used as a source of hydrogen for the hydrotreating reaction zone.
    Type: Grant
    Filed: January 8, 1999
    Date of Patent: March 13, 2001
    Assignee: Chevron U.S.A. Inc.
    Inventors: Dennis R. Cash, Hyung-Jae A. Yoon