Patents by Inventor Roger D. Wragg

Roger D. Wragg 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).

  • Method of preparing a catalyst precursor comprised of calcined nickel-aluminum feitknecht compound/non-calcined alumino-silicate clay/alkaline earth and/or rear earth metal compound
    Patent number: 4985385
    Abstract: A catalyst precursor is prepared by intimately mixing a nickel-aluminium Feitknecht compound with a non-calcined aluminosilicate clay mineral and at the same time and/or subsequently with at least one additive comprising an alkaline earth and/or rare earth metal compound. The resulting mixture is then calcined to produce the catalyst precursor which can be reduced to the catalyst form. The catalyst may be used, for example, in the methanation of gases and the presence of the additive reduces silicon species loss from the catalyst during use.
    Type: Grant
    Filed: September 25, 1989
    Date of Patent: January 15, 1991
    Assignee: British Gas plc
    Inventors: Alan Williams, John D. Wilson, Roger D. Wragg, Stephen D. Jones, Costa Komodromos, Timothy J. Reynolds