Patents Represented by Attorney Gwenetta Douglas Hill

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  • Process for the preparation of unsaturated acids from unsaturated aldehydes
    Patent number: 4075123
    Abstract: Methacrylic acid or acrylic acid are produced by the oxidation of methacrolein or acrolein, respectively, with molecular oxygen in the vapor phase in the presence of a catalytic oxide of molybdenum, phosphorus, arsenic, a rare earth element or mixture thereof, oxygen, and optionally, at least one of Ag, Tl, Rh, Pd, Ru, Pt, Cd, Al, Au, Cu, alkaline earth metal, Cl, and NH.sub.4.
    Type: Grant
    Filed: October 19, 1976
    Date of Patent: February 21, 1978
  • Process for the preparation of unsaturated acids from unsaturated aldehydes
    Patent number: 4072708
    Abstract: Methacrylic acid or acrylic acid are produced by the oxidation of methacrolein or acrolein, respectively, with molecular oxygen in the vapor phase in the presence of a catalytic oxide of molybdenum, phosphorus, arsenic, a rare earth element or mixture thereof, oxygen, and optionally, at least one of Ag, Tl, Rh, Pd, Ru, Pt, Cd, Al, Au, Cu, alkaline earth metal, Cl, and NH.sub.4.
    Type: Grant
    Filed: January 31, 1977
    Date of Patent: February 7, 1978
  • Process for the preparation of methacrylic acid from the corresponding aldehyde
    Patent number: 4070397
    Abstract: Catalysts containing tungsten, phosphorus, vanadium and molybdenum have been found to be especially effective for the oxidation of unsaturated aldehydes to form the corresponding unsaturated acid. These catalysts may optionally contain one or more of tin, antimony, arsenic, copper, cerium, boron, chromium, iron, nickel, cobalt, uranium, manganese, strontium, silver, rubidium, rhodium, cadmium, bismuth, indium, zinc and lanthanum.
    Type: Grant
    Filed: March 27, 1975
    Date of Patent: January 24, 1978
  • Tar sands recovery process
    Patent number: 4067796
    Abstract: The present invention is an improved process for the recovery of bitumen from tar sand by employing a vessel containing a liquid comprising an organic phase consisting of a hydrocarbon solvent which is immiscible in water and an aqueous phase. The tar sand optionally containing water is introduced into the organic phase and then subsequently passes into the aqueous phase.
    Type: Grant
    Filed: May 27, 1975
    Date of Patent: January 10, 1978
  • Manufacture of maleic anhydride from butane
    Patent number: 4065468
    Abstract: Maleic anhydride is produced by the reaction of n-butane with a molecular oxygen-containing gas at an elevated temperature in the presence of a catalyst composed of the combined oxides of the elements antimony, molybdenum and at least one member selected from the group consisting of iron and vanadium and optionally one or more oxides of aluminum, boron, tellurium, chromium, cobalt, nickel, copper, bismuth, phosphorus titanium and tungsten.
    Type: Grant
    Filed: May 12, 1976
    Date of Patent: December 27, 1977