Patents by Inventor Darrell W. Walker

Darrell W. Walker 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).

  • Patent number: 4228040
    Abstract: A process is used to dehydrogenate organic compounds to a higher degree of unsaturation by contacting in a first step, the organic compound with a calcined zinc titanate catalyst modified with lithium or magnesium. In the second step, the catalyst is contacted with oxygen essentially in the absence of the dehydrogenatable organic compound. The first and second steps are repeated sequentially.
    Type: Grant
    Filed: June 13, 1979
    Date of Patent: October 14, 1980
    Assignee: Phillips Petroleum Company
    Inventors: Brent J. Bertus, Darrell W. Walker
  • Patent number: 4218346
    Abstract: A process is used to dehydrogenate organic compounds to a higher degree of unsaturation by contacting in a first step, the organic compound with a calcined zinc titanate catalyst. In the second step, the catalyst is contacted with oxygen essentially in the absence of the dehydrogenatable organic compound. The first and second steps are repeated sequentially.
    Type: Grant
    Filed: January 8, 1979
    Date of Patent: August 19, 1980
    Assignee: Phillips Petroleum Company
    Inventors: Darrell W. Walker, Floyd E. Farha, Jr.
  • Patent number: 4218343
    Abstract: Hydrocarbon feedstocks are dehydrogenated to compounds having the same number of carbon atoms and a higher degree of unsaturation by contacting the feedstock in the vapor phase in the presence of molecular oxygen with a catalyst consisting essentially of nickel, lead, phosphorus and combined oxygen, and optionally, an alkali metal. Representative of such conversions is the oxidative dehydrogenation of butane to butenes and butadiene.
    Type: Grant
    Filed: May 1, 1979
    Date of Patent: August 19, 1980
    Assignee: Phillips Petroleum Company
    Inventors: Darrell W. Walker, Robert J. Hogan, Floyd Farha, Jr.
  • Patent number: 4176140
    Abstract: A process is used to dehydrogenate organic compounds to a higher degree of unsaturation by contacting in a first step, the organic compound with a calcined zinc titanate catalyst modified with lithium or magnesium. In the second step, the catalyst is contacted with oxygen essentially in the absence of the dehydrogenatable organic compound. The first and second steps are repeated sequentially.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: November 27, 1979
    Assignee: Phillips Petroleum Company
    Inventors: Brent J. Bertus, Darrell W. Walker
  • Patent number: 4167532
    Abstract: Hydrocarbon feedstocks are dehydrogenated to compounds having the same number of carbon atoms and a higher degree of unsaturation by contacting the feedstock in the vapor phase in the presence of molecular oxygen with a catalyst consisting essentially of nickel, lead, phosphorus and combined oxygen, and optionally, an alkali metal. Representative of such conversions is the oxidative dehydrogenation of butane to butenes and butadiene.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: September 11, 1979
    Assignee: Phillips Petroleum Co.
    Inventors: Darrel W. Walker, Robert J. Hogan, Floyd Farha, Jr.
  • Patent number: 4144277
    Abstract: A process is used to dehydrogenate organic compounds to a higher degree of unsaturation by contacting in a first step, the organic compound with a calcined zinc titanate catalyst. In the second step, the catalyst is contacted with oxygen essentially in the absence of the dehydrogenatable organic compound. The first and second steps are repeated sequentially.
    Type: Grant
    Filed: October 27, 1977
    Date of Patent: March 13, 1979
    Assignee: Phillips Petroleum Company
    Inventors: Darrell W. Walker, Floyd E. Farha, Jr.
  • Patent number: 4010114
    Abstract: Ferrous metal/tin/phosphorus/alkali metal/oxygen-containing oxidative dehydrogenation catalysts are improved by including a small amount of lead; higher yields and higher gas phase selectivities to dehydrogenated products in the oxidative dehydrogenation process are achieved by these novel lead-containing catalysts.
    Type: Grant
    Filed: April 30, 1975
    Date of Patent: March 1, 1977
    Assignee: Phillips Petroleum Company
    Inventors: Darrell W. Walker, Floyd E. Farha, Jr.