Patents by Inventor Don Gordon Campbell

Don Gordon Campbell 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 for the preparation of metallocene catalysts
    Patent number: 6777366
    Abstract: Process of preparing silica-supported catalysts. A support material comprising silica particles impregnated with an alumoxane co-catalyst with at least one-half of the co-catalyst disposed within the internal pore volume of the silica is contacted with a dispersion of a metallocene catalyst in an aromatic solvent. The dispersion and support are mixed at a temperature of about 10° C. or less to enable the metallocene to become reactively supported on and impregnated within the alumoxane-impregnated silica particles. The supported catalyst is recovered from the aromatic solvent and washed with an aromatic hydrocarbon and then a paraffinic hydrocarbon at a temperature of about 10° C. or less. The washed catalyst is dispersed in a viscous mineral oil.
    Type: Grant
    Filed: February 13, 2001
    Date of Patent: August 17, 2004
    Assignee: Fina Technology, Inc.
    Inventors: William John Gauthier, Margarito Lopez, David John Rauscher, Don Gordon Campbell, Jr., Margaret Elaine Kerr
  • Method for the preparation of metallocene catalysts
    Publication number: 20020137624
    Abstract: Process of preparing silica-supported catalysts. A support material comprising silica particles impregnated with an alumoxane co-catalyst with at least one-half of the co-catalyst disposed within the internal pore volume of the silica is contacted with a dispersion of a metallocene catalyst in an aromatic solvent. The dispersion and support are mixed at a temperature of about 10° C. or less to enable the metallocene to become reactively supported on and impregnated within the alumoxane-impregnated silica particles. The supported catalyst is recovered from the aromatic solvent and washed with an aromatic hydrocarbon and then a paraffinic hydrocarbon at a temperature of about 10° C. or less. The washed catalyst is dispersed in a viscous mineral oil.
    Type: Application
    Filed: February 13, 2001
    Publication date: September 26, 2002
    Inventors: William John Gauthier, Margarito Lopez, David John Rauscher, Don Gordon Campbell, Margaret Elaine Kerr