Patents by Inventor Wilfried R. Herda

Wilfried R. Herda 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).

  • Catalyst for hydrorefining
    Patent number: 5648311
    Abstract: The invention relates to a catalytic hydrorefining of mixtures of hydrocarbons which contain hetero atoms such as nitrogen, sulphur, halogens and/or oxygen. The characterizing feature of the invention is that nickel or a nickel-molybdenum alloy containing more than 30% nickel, residue molybdenum, is thermally treated in an air atmosphere at temperatures of 400.degree. to 1200.degree. C. for a period of 0.25 to 10 hours, whereafter it is subjected to a hydrogen activation in the temperature range of 200.degree. to 600.degree. C.
    Type: Grant
    Filed: August 14, 1994
    Date of Patent: July 15, 1997
    Assignee: Krupp VDM GmbH
    Inventors: Wilfried R. Herda, Jurgen Koppe