Patents by Inventor Warn D. Robinson

Warn D. Robinson 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).

  • Maleic anhydride production with high crush strength catalysts
    Patent number: 4386215
    Abstract: In the method for the preparation of maleic anhydride by oxidizing an aliphatic hydrocarbon in the presence of a phosphorus-vanadium-oxygen complex catalyst, the improvement which comprises employing a catalyst with enhanced crush strength.
    Type: Grant
    Filed: November 27, 1981
    Date of Patent: May 31, 1983
    Assignee: Monsanto Company
    Inventors: Ramon A. Mount, Warn D. Robinson
  • Solvent conditioning of phosphorus-vanadium-oxygen catalysts
    Patent number: 4359405
    Abstract: In the preparation of phosphorus-vanadium-oxygen catalyst, where vanadium and phosphorus are contacted under conditions to provide a catalyst precursor with vanadium in the tetravalent state, and the precursor is formed into agglomerations and subsequently calcined at high temperatures, the improvement which comprises contacting the catalyst precursor with a non-aqueous solvent in an amount sufficient to enhance crush strength.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: November 16, 1982
    Assignee: Monsanto Company
    Inventors: Ramon A. Mount, Warn D. Robinson
  • Method of producing maleic anhydride
    Patent number: 4276222
    Abstract: In the method for the preparation of maleic anhydride by oxidizing an aliphatic hydrocarbon in the presence of a phosphorus-vanadium-oxygen complex catalyst, the improvement which comprises employing a catalyst with enhanced surface adhesion thereby reducing attrition during preparation of the maleic anhydride.
    Type: Grant
    Filed: December 26, 1979
    Date of Patent: June 30, 1981
    Assignee: Monsanto Company
    Inventors: Ramon A. Mount, Warn D. Robinson
  • Conditioning phosphorus-vanadium-oxygen catalyst
    Patent number: 4253988
    Abstract: In the preparation of phosphorus-vanadium-oxygen catalyst, where vanadium and phosphorus are contacted under conditions to provide a catalyst precursor with vanadium in the tetravalent state, and the precursor is formed into agglomerations and subsequently calcined at high temperatures, the improvement which comprises wetting the catalyst precursor with an aqueous liquid in an amount sufficient to enhance surface adhesion prior to calcining.
    Type: Grant
    Filed: October 26, 1979
    Date of Patent: March 3, 1981
    Assignee: Monsanto Company
    Inventors: Ramon A. Mount, Warn D. Robinson
  • Method for preparing an oxidation catalyst
    Patent number: 4149992
    Abstract: In a method for preparing a phosphorus-vanadium-oxygen catalyst wherein a pentavalent vanadium compound and a trivalent phosphorus compound are brought together in a liquid reaction zone under conditions to provide a substantial amount of tetravalent vanadium and to form a phosphorus-vanadium-oxygen catalyst precursor having a phosphorus to vanadium atom ratio between about 0.9:1 and about 2:1, the improvement of this invention comprises adding a sufficient amount of a surfactant to the liquid reaction zone to form a dispersion which comprises a liquid, the surfactant and a dispersoid of the phosphorus-vanadium-oxygen catalyst precursor.
    Type: Grant
    Filed: June 21, 1976
    Date of Patent: April 17, 1979
    Assignee: Monsanto Company
    Inventors: Ramon A. Mount, Harold Raffelson, Warn D. Robinson
  • Method for preparing an oxidation catalyst
    Patent number: 4116868
    Abstract: In a method for preparing a phosphorus-vanadium-oxygen catalyst wherein a pentavalent vanadium compound and a trivalent phosphorus compound are brought together in a liquid reaction zone under conditions to provide a substantial amount of tetravalent vanadium and to form a phosphorus-vanadium-oxygen catalyst precursor having a phosphorus to vanadium atom ratio between about 0.9:1 and about 2:1, the improvement of this invention comprises adding a sufficient amount of a surfactant to the liquid reaction zone to form a dispersion which comprises a liquid, the surfactant and a dispersoid of the phosphorus-vanadium-oxygen catalyst precursor.
    Type: Grant
    Filed: December 1, 1976
    Date of Patent: September 26, 1978
    Assignee: Monsanto Company
    Inventors: Ramon A. Mount, Harold Raffelson, Warn D. Robinson