Patents Represented by Attorney Nancy Joyce Gracey

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  • Water removal in a redox process
    Patent number: 4853192
    Abstract: Excess water is removed from regenerated redox solution by contacting a downwardly flowing spray of regenerated redox solution with a stream of inert gas at a rate and pressure sufficient to provide for the substantial saturation of the gas with excess water impurities in the redox solution without the substantial undesirable oxidation of the metal in the regenerated redox solution.
    Type: Grant
    Filed: December 12, 1988
    Date of Patent: August 1, 1989
    Assignee: Shell Oil Company
    Inventor: Howard L. Fong
  • Removing NOX from cryogenic systems
    Patent number: 4824646
    Abstract: A process for the removal of NO.sub.x impurities from a gas stream which comprises treating the gas stream containing NO.sub.x impurities under cryogenic conditions with oxygen and an unsaturated hydrocarbon, removing solid N.sub.2 O.sub.3 and recovering a gas stream reduced in NO.sub.x.
    Type: Grant
    Filed: December 4, 1987
    Date of Patent: April 25, 1989
    Assignee: Shell Oil Company
    Inventor: Weston W. Haskell
  • Preparation of optically-active cyanomethyl esters
    Patent number: 4681947
    Abstract: Optically-active alpha-cyano esters are prepared by treating a non-symmetrical ketene with a racemic or an optically-active alpha-hydroxynitrile or with an aldehyde and cyanide ions in the presence of an optically-active amine catalyst.
    Type: Grant
    Filed: January 18, 1985
    Date of Patent: July 21, 1987
    Inventors: Donald W. Stoutamire, Charles H. Tieman