Patents by Inventor Wu-Hsun Cheng

Wu-Hsun Cheng 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).

  • Methanol dissociation catalysts
    Patent number: 5106810
    Abstract: The activity of nonfused methanol dissociation catalysts containing copper and optionally chromium, magnesium, calcium, barium, strontium, manganese, molybdenum, ruthenium and palladium can be improved by the incorporation of 0.1 to 20 weight percent amorphous silica.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: April 21, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Wu-Hsun Cheng, August Ferretti
  • Regeneration of methanol dissociation catalysts
    Patent number: 4855267
    Abstract: Process for the regeneration of deactivated copper-containing catalysts used in methanol or methyl formate dissociation reactions or in the steam reforming of methanol by first oxidizing then reducing the copper component of the copper-containing catalyst.
    Type: Grant
    Filed: April 25, 1988
    Date of Patent: August 8, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Wu-Hsun Cheng
  • Carbon dioxide calcination of methanol dissociation catalysts
    Patent number: 4826798
    Abstract: An improvement process for the preparation of copper-containing methanol dissociation catalysts by precipitation of a copper-containing catalyst precursor, calcination, and reduction of the precursor, the improvement comprising conducting the calcination of the precursor in an atmosphere of CO.sub.2.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: May 2, 1989
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Wu-Hsun Cheng