Patents by Inventor John G. McCullough

John G. McCullough 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).

  • Alkanolamine gas treating composition and process
    Patent number: 4971718
    Abstract: A novel alkanolamine gas treating composition and method for purifying a gas stream containing acid gas impurities. The composition consists essentially of an alkanolamine solvent in an aqueous solution with antimony wherein said alkanolamine solvent includes at least about 1% by weight of methydiethanolamine (MDEA) and at least about 5% monoethanolamine (MEA) by weight of the total solution, and with said antimony present in a concentration of at least about 100 ppm. The combination of antimony and MDEA inhibits corrosion and retards solvent degradation.
    Type: Grant
    Filed: July 25, 1988
    Date of Patent: November 20, 1990
    Assignee: UOP
    Inventors: John G. McCullough, Joseph A. Faucher, Daniel J. Kubek, Kenneth J. Barr
  • Alkanolamine gas treating process for a feedstream containing hydrogen sulfide
    Patent number: 4764354
    Abstract: In an alkanolamine gas treating process for removing acid gas from a feedstream in which hydrogen sulfide is present, reduced corrosion of steel parts or components is observed when solution concentrations of hydrogen sulfide and vanadium in the plus five valence state are maintained above certain minimum levels.
    Type: Grant
    Filed: February 4, 1987
    Date of Patent: August 16, 1988
    Assignee: Union Carbide Corporation
    Inventors: Daniel J. Kubek, John G. McCullough, Kenneth J. Barr, Alexander J. Kosseim
  • Corrosion inhibitors for alkanolamine gas treating systems
    Patent number: 4502979
    Abstract: Corrosion of metallic surfaces by aqueous alkanolamine solutions employed in acid gas removal is inhibited by combinations of particular vanadium compounds and an organic compound selected from the group consisting of nitro-substituted aromatic acids, nitro-substituted acid salts, and 1,4-naphthoquinone, preferably from the group consisting of p-nitrobenzoic acid, m-nitrobenzoic acid, 3,5-dinitrobenzoic acid, p-nitrophenol, m-nitrophenol, m-nitrobenzenesulfonic acid, 1,4-naphthoquinone, and mixtures thereof.
    Type: Grant
    Filed: November 29, 1982
    Date of Patent: March 5, 1985
    Assignee: Union Carbide Corporation
    Inventors: John G. McCullough, Kenneth J. Barr