Patents by Inventor Denton C. Fentress

Denton C. Fentress 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).

  • Preparation of phenol or phenol derivatives
    Patent number: 5874646
    Abstract: In a process for converting an aromatic compound such as benzene into its hydroxylated derivative, generation of carbon monoxide during catalyst regeneration is reduced if the catalyst is a zeolite that contains ruthenium, rhodium, platinum, palladium, or irridium.
    Type: Grant
    Filed: August 7, 1996
    Date of Patent: February 23, 1999
    Assignee: Solutia Inc.
    Inventors: Jerry R. Ebner, Timothy R. Felthouse, Denton C. Fentress
  • Potassium carbonate supports, catalysts, and olefin dimerization processes therewith
    Patent number: 5237117
    Abstract: Catalyst supports, catalyst systems, methods for the preparation thereof, and dimerization process therewith are provided catalyst supports are extruded from a thick paste of potassium carbonate and water catalyst systems comprise at least one elemental alkali metal deposited on the catalyst support. Optionally, the catalyst system further comprises at least one promoter.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: August 17, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Paul F. Schubert, Ralph E. Bonnell, Norman L. Freeman, Jr., Denton C. Fentress, Kent E. Mitchell, Richard E. Lowery, Dodnald H. Kubicek
  • Continuous antimony pentoxide production
    Patent number: 5213785
    Abstract: This invention concerns an improved means of oxidizing aqueous dispersions of antimony trioxide to colloidal hydrous antimony pentoxide in a continuous flow system. The oxidant is hydrogen peroxide and the continuous flow system nominally consists of a static mixer and a tubular reactor.
    Type: Grant
    Filed: October 21, 1991
    Date of Patent: May 25, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Denton C. Fentress, Kent E. Mitchell, Don W. Godbehere, Larry S. Maddox, Richard E. Lowery, Howard F. Efner
  • Process for preparing carbonate supports and catalysts
    Patent number: 5202298
    Abstract: Catalyst supports, catalyst systems, methods for the preparation thereof, and dimerization process therewith are provided catalyst supports are extruded from a thick paste of potassium carbonate and water catalyst systems comprise at least one elemental alkali metal deposited on the catalyst sypport. Optionally, the catalyst system further comprises at least one promoter.
    Type: Grant
    Filed: December 5, 1990
    Date of Patent: April 13, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Paul F. Schubert, Ralph E. Bonnell, Norman L. Freeman, Jr., Denton C. Fentress, Kent E. Mitchell, Richard E. Lowrey, Donald H. Kubicek, Warren M. Ewert
  • Rapidly dispersible compositions of antimony pentoxide
    Patent number: 4804496
    Abstract: A process is disclosed for producing a powdered antimony pentoxide composition that rapidly disperses on contact with water. The process comprises spray drying the antimony sol at a temperature of from 180.degree. to 210.degree. F.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: February 14, 1989
    Assignee: Phillips Petroleum Company
    Inventors: Richard E. Lowery, Denton C. Fentress, Don W. Godbehere