Patents by Inventor William W. Prichard

William W. Prichard 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).

  • Pd/Re hydrogenation catalyst for making tetrahydrofuran and 1,4-butanediol
    Patent number: 4609636
    Abstract: Palladium/rhenium-on-carbon catalyst; a method employing said catalyst to produce tetrahydrofuran, 1,4-butanediol or mixtures thereof in selectable ratios from a number of starting reactants; and a method for making the Pd/Re/C catalyst.
    Type: Grant
    Filed: June 4, 1985
    Date of Patent: September 2, 1986
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Melinda A. Mabry, William W. Prichard, Stanislaw B. Ziemecki
  • Process for making tetrahydrofuran and 1,4-butanediol using Pd/Re hydrogenation catalyst
    Patent number: 4550185
    Abstract: Palladium/rhenium-on-carbon catalyst; a method employing said catalyst to produce tetrahydrofuran, 1,4-butanediol or mixtures thereof in selectable ratios from a number of starting reactants; and a method for making the Pd/Re/C catalyst.
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: October 29, 1985
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Melinda A. Mabry, William W. Prichard, Stanislaw B. Ziemecki
  • Oxidation of butadiene to furan
    Patent number: 4298531
    Abstract: Process for preparing furan from 1,3-butadiene, the process comprising contacting the butadiene, at about 65.degree. C. to about 120.degree. C., with a solution having a pH of 0-2.5 and containing palladium ions and a heteropolyacid having a redox potential greater than 0.5 volt, to produce furan.
    Type: Grant
    Filed: December 15, 1980
    Date of Patent: November 3, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Richard V. Lindsey, Jr., William W. Prichard
  • Process for the preparation of 2,5-dihydrofuran
    Patent number: 4255338
    Abstract: A process for the hydrogenation of butadienepolyperoxide in a suitable solvent, e.g., tetrahydrofuran, at temperatures of 75.degree.-110.degree. C. and pressure above 2000 psia by contacting the butadienepolyperoxide and hydrogen in the presence of metallic silver. The process produces 1-butene-3,4-diol and 2-butene-1,4-diol.
    Type: Grant
    Filed: October 12, 1979
    Date of Patent: March 10, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William W. Prichard
  • Hydrogenation of butadienepolyperoxide with activated phase-pure NiAl.sub.3
    Patent number: 4247722
    Abstract: A process for hydrogenation of butadienepolyperoxide to 1,2-butanediol and 1,4-butanediol which comprises hydrogenating a mixture of butadienepolyperoxide in a solvent and with a catalyst comprising an activated phase-pure NiAl.sub.3 at a temperature of from 75.degree.-120.degree. C. and a pressure of at least 1000 psi.
    Type: Grant
    Filed: March 5, 1980
    Date of Patent: January 27, 1981
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Michael J. Kelley, William W. Prichard
  • Hydrogenation of butadienepolyperoxide to unsaturated diols
    Patent number: 4209651
    Abstract: A process for the hydrogenation of butadienepolyperoxide in a suitable solvent, e.g., tetrahydrofuran, at temperatures of 75.degree.-110.degree. C. and pressure above 2000 psia by contacting the butadienepolyperoxide and hydrogen in the presence of metallic silver. The process produces 1-butene-3,4-diol and 2-butene-1,4-diol.
    Type: Grant
    Filed: February 21, 1979
    Date of Patent: June 24, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William W. Prichard
  • Conversion of furan to 1,4-butanediol and tetrahydrofuran
    Patent number: 4146741
    Abstract: Furan is hydrogenated in the presence of a nickel catalyst and a dicarboxylic acid having 4 to 10 carbons to produce 1,4-butanediol and tetrahydrofuran.
    Type: Grant
    Filed: August 15, 1977
    Date of Patent: March 27, 1979
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: William W. Prichard
  • Substituted diphenyl-3-formazancarbonitrile insecticides
    Patent number: 4069320
    Abstract: Substituted 1,5-diphenyl-3-formazancarbonitriles, certain of which are novel, are useful in controlling insects. A preferred compound is 1,5-bis(4-trifluoromethylphenyl)-3-formazancarbonitrile.
    Type: Grant
    Filed: January 23, 1976
    Date of Patent: January 17, 1978
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William W. Prichard, Francis Wilfred Stacey
  • Semipermeable microcapsules containing heterogeneous catalysts and ferromagnetic materials
    Patent number: 3954666
    Abstract: Described are semipermeable microcapsules which comprise an outer semipermeable polymeric skin encapsulating a finely divided heterogeneous catalyst and a ferromagnetic material. The microcapsules are useful as magnetic, heterogeneous catalysts.
    Type: Grant
    Filed: July 11, 1974
    Date of Patent: May 4, 1976
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Mark James Marquisee, William W. Prichard