Patents by Inventor Hin-Wan Wong

Hin-Wan Wong 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: 4682986
    Abstract: Carbon and catalyst containing chars obtained from a catalytic coal gasification or combustion operation may be separated into two layers of fractions by contacting them with an inert gas so as to fluidize them and thereby separately recover fractions of carbon-rich chars and fractions of carbon-poor chars, and collecting the separate fractions. The carbon-rich chars may then be recycled to the gasifier to be gasified, and the carbon-poor chars may be treated to recover the catalyst. Larger catalyst containing chars may be effectively separated in the presence of a host medium of a bed of solids fluidized by the inert gas. Smaller chars may be separated in the absence of such a host medium.
    Type: Grant
    Filed: November 29, 1984
    Date of Patent: July 28, 1987
    Assignee: Exxon Research and Engineering
    Inventors: Wei-Kuo Lee, Hin-Wan Wong