Patents by Inventor Lee Rigby

Lee Rigby 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 regenerating a catalyst
    Patent number: 7811955
    Abstract: Platinum is applied on a carrier such as graphite to form a platinum catalyst. The catalyst becomes poisoned with a metal as a result of use of the catalyst in preparation of hydroxylammonium salts. A method of regenerating the catalyst dissolves the platinum and the metal in an acid. The method also adds ammonium sulfate to the acid to precipitate the platinum. The ammonium sulfate is a by-product of a commercial process to synthesize a caprolactam. Also, the method precipitates the platinum onto the carrier for reuse in the preparation of the hydroxylammonium salts and in preparation of the caprolactam.
    Type: Grant
    Filed: November 10, 2005
    Date of Patent: October 12, 2010
    Assignee: BASF SF
    Inventors: Lee Rigby, R. Merritt Sink
  • Method of Generating a Catalyst
    Publication number: 20070293389
    Abstract: Platinum is applied on a carrier such as graphite to form a platinum catalyst. The catalyst becomes poisoned with a metal as a result of use of the catalyst in preparation of hydroxylammonium salts. A method of regenerating the catalyst dissolves the platinum and the metal in an acid. The method also adds ammonium sulfate to the acid to precipitate the platinum. The ammonium sulfate is a by-product of a commercial process to synthesize a captrolactam. Also, the method precipitates the platinum onto the carrier for reuse in the preparation of the hydroxylammonium salts and in preparation of the caprolactam.
    Type: Application
    Filed: November 10, 2005
    Publication date: December 20, 2007
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Lee Rigby, R. Sink