Patents by Inventor David C. Bogert

David C. Bogert 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).

  • Ultra high zeolite content FCC catalysts and method for making same from microspheres composed of a mixture of calcined kaolin clays
    Patent number: 5023220
    Abstract: A method for increasing the zeolite content of high zeolite content clay derived microspheres obtained by reacting porous precursor microspheres with a sodium silicate solution in the presence of seeds to crystallize zeolite Y in situ in macropores of precursor microspheres composed of a mixture of metakaolin and kaolin calcined to undergo the exotherm. The increased zeolite content is achieved by increasing macroporosity of the precursor microspheres and increasing the content of metakaolin in the precursor microspheres. The increase in zeolite is associated with an increase in catalytic activity and unexpectedly improved selectivity.
    Type: Grant
    Filed: June 13, 1990
    Date of Patent: June 11, 1991
    Assignee: Engelhard Corporation
    Inventors: Lawrence B. Dight, David C. Bogert, Mark A. Leskowicz