Patents by Inventor John T. Shultz

John T. Shultz 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).

  • Maintaining VPO catalyst performance by aluminizing reactor internals in oxidation of butane to maleic anhydride
    Patent number: 5326886
    Abstract: Catalysts comprising a compound of vanadium, phosphorus and oxygen which are employed in the oxidation of n-butane to maleic anhydride are protected from contamination caused by side reactions which occur between the catalyst and steel process equipment by covering the process equipment surfaces which contact the catalyst at elevated temperatures with a coating comprising aluminum oxide.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: July 5, 1994
    Assignee: The Standard Oil Company
    Inventor: John T. Shultz
  • Method for eliminating nitriding during acrylonitrile production
    Patent number: 5256810
    Abstract: An improved process for substantially eliminating, preferably completely eliminating of nitride formation on feed conduits for fluid bed catalyst reactors used in the manufacture of unsaturated nitriles from corresponding olefins, NH.sub.3 and oxygen comprising maintaining the temperature of the ammonia inside the conduit below its dissociation temperature and/or maintaining the temperature of the inside surface of the conduit below the temperature at which any monoatomic nitrogen can react with the conduit to form a nitride.
    Type: Grant
    Filed: October 14, 1992
    Date of Patent: October 26, 1993
    Assignee: The Standard Oil Company
    Inventors: Steven J. Rowe, John T. Shultz, Robert J. Mack, Susan L. Dio