Patents by Inventor Franz Schamann, deceased

Franz Schamann, deceased 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).

  • Regenerating heavy metal catalysts for butynediol production
    Patent number: 4388216
    Abstract: A process for regenerating suspended heavy metal catalysts used in the synthesis of butynediol from acetylene and formaldehyde. The aqueous catalytic slurry removed from the reaction mixture is raised to a temperature of about 200.degree. to 500.degree. C., where appropriate with air supplied, and is left at this temperature with air being supplied, until the carbon content of the catalytic substance is about 0.5 to 3%.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: June 14, 1983
    Assignee: GAF Huls Chemie GmbH
    Inventors: Helmut Westernacher, Franz Schamann, deceased