Patents by Inventor David R. Bryant

David R. Bryant 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: 7446231
    Abstract: An improved hydroformylation process involving reacting one or more reactants, such as an olefin, with carbon monoxide and hydrogen in the presence of a hydroformylation catalyst, to produce a reaction product fluid comprising one or more products, preferably aldehydes; wherein said process is conducted in a region of the hydroformylation rate curve that is negative or inverse order in carbon monoxide, which is sufficient to prevent and/or lessen deactivation of the hydroformylation catalyst; and wherein total pressure is controlled at a predetermined target value and/or vent flow rate is controlled at a predetermined target value, by adjusting a flow of a carbon-monoxide containing inlet gas, so as to prevent and/or lessen cycling of process parameters, e.g., reaction rate, total pressure, vent flow rate, and/or temperature.
    Type: Grant
    Filed: July 19, 2005
    Date of Patent: November 4, 2008
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Ronald R Peterson, Thomas C. Eisenschmid, David R. Bryant, Morteza Mokhtarzadeh
  • Publication number: 20040087754
    Abstract: This invention relates to polyurethane compounds, e.g., elastomers, which are the reaction product of a cycloaliphatic diisocyanate, a polyol and a chain extender. The cycloaliphatic diisocyanate comprises (i) trans-1,4-bis(isocyanatomethyl)cyclohexane or (ii) an isomeric mixture of two or more of cis-1,3-bis(isocyanatomethyl)cyclohexane, trans-1,3-bis(isocyanatomethyl)cyclohexane, cis-1,4-bis(isocyanatomethyl)cyclohexane and trans-1,4-bis(isocyanatomethyl)cyclohexane, provided the isomeric mixture comprises at least about 5 weight percent of said trans-1,4-bis(isocyanatomethyl)cyclohexane. This invention also relates to shaped and molded articles prepared from said polyurethane compounds.
    Type: Application
    Filed: October 31, 2002
    Publication date: May 6, 2004
    Inventors: Paul Foley, John N. Argyropoulos, David R. Bryant, Debkumar Bhattacharjee, Aisa Sendijarevic
  • Patent number: 5298472
    Abstract: A process for hydrogenating bound oxygen-containing organic feeds into their corresponding alcohols by contact with a coprecipitated copper-aluminum catalyst that has been activated by contact with reducing gas at a temperature that gradually increases.
    Type: Grant
    Filed: December 3, 1992
    Date of Patent: March 29, 1994
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Richard W. Wegman, David R. Bryant
  • Patent number: 5288918
    Abstract: An improved rhodium-organophosphite complex catalyzed hydroformylation process, the improvement comprising carrying out said process in the presence of a catalytic activity enhancing additive said additive being selected from the class consisting of added water, a weakly acidic compound, or both added water and a weakly acidic compound.
    Type: Grant
    Filed: September 29, 1992
    Date of Patent: February 22, 1994
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: John M. Maher, James E. Babin, Ernst Billig, David R. Bryant, Tak W. Leung
  • Patent number: 5237106
    Abstract: A process for improving the catalytic activity of a partially deactivated solubilized rhodium-tertiary organophosphine complex hydroformylation catalyst by treating it with propargyl alcohol and a carboxylic acid.
    Type: Grant
    Filed: January 24, 1992
    Date of Patent: August 17, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: James E. Babin, David R. Bryant, Arnold M. Harrison, David J. Miller
  • Patent number: 5231222
    Abstract: An improved esterification process for producing volatile product esters by reacting a lower linear hydrocarbyl carboxylic acid with an alcohol containing from 2 to 10 carbon atoms, in a substantially non-aqueous medium, the improvement comprising minimizing the amount of acidic sulfate contained in the product ester by employing as the esterification catalyst a long chain alkylbenzene sulfonic acid catalyst, the alkyl radical containing from 8 to 20 carbon atoms, or mixtures of such catalysts.
    Type: Grant
    Filed: July 2, 1991
    Date of Patent: July 27, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Anthony J. Papa, David R. Bryant
  • Patent number: 5191091
    Abstract: A process for hydrogenating bound oxygen-containing organic feeds into their corresponding alcohols by contact with a coprecipitated copper-aluminum catalyst that has been activated by contact with reducing gas at a temperature that gradually increases.
    Type: Grant
    Filed: January 27, 1992
    Date of Patent: March 2, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Richard W. Wegman, David R. Bryant
  • Patent number: 5183943
    Abstract: A process for improving the catalytic activity of a partially deactivated solubilized rhodium - tertiary organophosphine complex hydroformylation catalyst.
    Type: Grant
    Filed: March 18, 1991
    Date of Patent: February 2, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: David R. Bryant, James E. Babin, James C. Nicholson, Donald J. Weintritt, Jr.
  • Patent number: 5180854
    Abstract: Process for the separation and recovery of aldehyde product from a non-aqueous hydroformylation reaction product composition comprising the aldehyde product, a rhodium-ionically charged phosphorus ligand complex, a free ionically charged phosphorus ligand and an organic solubilizing agent for said complex and said free ligand via phase separation using added water or both added water and an added non-polar hydrocarbon compounds.
    Type: Grant
    Filed: March 18, 1992
    Date of Patent: January 19, 1993
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Anthony G. Abatjoglou, David R. Bryant, Ronald R. Peterson
  • Patent number: 5142067
    Abstract: A process for hydrogenating feeds into their corresponding alcohols by contact with a coprecipitated catalyst comprising copper, aluminum, and a metal (X) selected from the group consisting of magnesium, zinc, titanium, zirconium, tin, nickel, cobalt and mixtures thereof; that has been reduced with an increasing temperature during the reduction.
    Type: Grant
    Filed: November 5, 1991
    Date of Patent: August 25, 1992
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Richard W. Wegman, David R. Bryant
  • Patent number: 5114473
    Abstract: A method for recovering a transition metal such as rhodium from a polar or non-polar liquid by contacting said transition metal-containing liquid with an ion-exchange resin having bonded ionically thereto an organophosphorus ligand; the transition metal can be eluted from the bed using a liquid containing a sufficient concentration of organophosphorus ligand.
    Type: Grant
    Filed: August 25, 1988
    Date of Patent: May 19, 1992
    Assignee: Union Carbide Chemicals and Plastics Technology Corporation
    Inventors: Anthony G. Abatjoglou, David R. Bryant
  • Patent number: 5113022
    Abstract: This invention relates to novel ionic phosphites and the use thereof as ligands in homogenous transition metal catalyzed processes, especially hydroformylation.
    Type: Grant
    Filed: August 8, 1991
    Date of Patent: May 12, 1992
    Assignee: Union Carbide Chemicals & Plastics Technology Corporation
    Inventors: Anthony G. Abatjoglou, David R. Bryant
  • Patent number: 5059710
    Abstract: This invention relates to novel ionic phosphites and the use thereof as ligands in homogenous transition metal catalyzed processes, especially hydroformylation.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: October 22, 1991
    Assignee: Union Carbide Chemicals and Plastics Technology Corporation
    Inventors: Anthony G. Abatjoglou, David R. Bryant
  • Patent number: 5053380
    Abstract: A process for hydrogenating bound oxygen-containing organic feeds into their corresponding alcohols by contact with a coprecipitated copper-aluminum catalyst that has been activated by contact with reducing gas at a temperature that gradually increases.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: October 1, 1991
    Assignee: Union Carbide Chemicals and Plastics Technology Corporation
    Inventors: Richard W. Wegman, David R. Bryant
  • Patent number: 5008235
    Abstract: A process for hydrogenating feeds into their corresponding alcohols by contact with a coprecipitated catalyst comprising copper, aluminum, and a metal (X) selected from the group consisting of magnesium, zinc, titanium, zirconium, tin, nickel, cobalt and mixtures thereof; that has been reduced with an increasing temperature during the reduction.
    Type: Grant
    Filed: December 21, 1989
    Date of Patent: April 16, 1991
    Assignee: Union Carbide Chemicals and Plastics Technology Corporation
    Inventors: Richard W. Wegman, David R. Bryant
  • Patent number: 4945185
    Abstract: A hydrocarbonylation process for producing an aldehyde or a mixture of a ketone and an aldehyde which comprises:(I) forming a reaction mixture comprising:(a) a catalytic amount of a complex catalyst consisting essentially of rhodium in complex combination with:(i) a triorganophosphine, and(ii) a carboxylic acid having a phenyl group substituted at the para position with a non-reactive electron-withdrawing group, said phenyl group being free of further substitution and said electron withdrawing group being substantially non-reactive in said process;(b) an alpha-olefin having 2 to 5 carbon atoms,(c) carbon monixide, and(d) hydrogenwith the proviso that the reaction mixture has mole ratio of said carbxoylic acid to rhodium of at least about 2; and(II) maintaining the reaction mixture at a temperature and pressure at which said (b), (c) and (d) react to form an aldehyde or a mixture of an aldehyde and a ketone.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: July 31, 1990
    Assignee: Union Carbide Chemicals and Plastics Company Inc.
    Inventors: Anthony J. Papa, David R. Bryant
  • Patent number: 4935550
    Abstract: A method for recovering a transition metal, e.g., rhodium, from a non-polar organic solution containing non-polar organic solvent-soluble and polar solvent-insoluble coordination complex of the transition metal and a non-polar organic solvent-soluble and polar solvent-insoluble ligand, e.g., an organophosphorus ligand, by contacting the non-polar organic solution with a polar solution of an ionic organophosphine ligand, the transition metal then can be transferred back into a non-polar solution for reuse. In one embodiment rhodium is rendered amenable for back-extraction by treating the polar solution with a suitable conditioning reagent.
    Type: Grant
    Filed: August 12, 1988
    Date of Patent: June 19, 1990
    Assignee: Union Carbide Chemicals and Plastics Company Inc.
    Inventors: David J. Miller, David R. Bryant
  • Patent number: 4929767
    Abstract: A process for treating an organic solution of a partially deactivated solubilized rhodium-tertiary organophosphine complex hydroformylation catalyst with an organic reagent in order to improve the extractability of rhodium therefrom into an aqueous solution containing an ionic organophosphine ligand.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: May 29, 1990
    Assignee: Union Carbide Chemicals and Plastics Company Inc.
    Inventors: David J. Miller, David R. Bryant, Ernst Billig, Bernard L. Shaw
  • Patent number: 4885401
    Abstract: Transition metal-bis-phosphite catalyzed carbonylation processes, especially hydroformylation, as well as transition metal-bis-phosphite compositions, bis-phosphite ligands and transition metal-bis-phosphite catalysts.
    Type: Grant
    Filed: March 31, 1988
    Date of Patent: December 5, 1989
    Assignee: Union Carbide Corporation
    Inventors: Ernst Billig, Anthony G. Abatjoglou, David R. Bryant
  • Patent number: D311668
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: October 30, 1990
    Assignee: The Scott Fetzer Company
    Inventors: David R. Bryant, Werner W. Kochte, Edward F. Trombly