Patents Represented by Attorney Marthe L. Gibbons
  • Patent number: 5118761
    Abstract: A thermoplastic composition is provided which comprises a blend of a thermoplastic such as a copolymer of styrene and maleic anhydride and a modified elastomeric component such as EPM or EPDM which has been modified with a primary amine functional monomer, such as a 2-amino-5-norbornene. The composition has improved impact strength.
    Type: Grant
    Filed: January 8, 1991
    Date of Patent: June 2, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Narayanaswami R. Dharmarajan, Sudhin Datta
  • Patent number: 5086028
    Abstract: A catalyst composition is provided which comprises at least one specified metal salt of a weak acid and a zinc salt of a weak acid or an iron salt of a weak acid. A process for preparing a N-halothio-sulfonamide-modified terpolymer of ethylene, an alpha olefin and a diene utilizing the catalyst is also provided. The catalyst is a selective catalyst in this process.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: February 4, 1992
    Assignee: Exxon Chemical Patents Inc.
    Inventor: Donald A. White
  • Patent number: 5017662
    Abstract: A catalyst composition is provided which comprises at least one specified metal salt of a weak acid and a zinc salt of a weak acid or an iron salt of a weak acid. A process for preparing a N-halothio-sulfonamide-modified terpolymer of ethylene, an alpha olefin and a diene utilizing the catalyst is also provided. The catalyst is a selective catalyst in this process.
    Type: Grant
    Filed: September 6, 1989
    Date of Patent: May 21, 1991
    Assignee: Exxon Chemical Patents, Inc.
    Inventor: Donald A. White
  • Patent number: 5013793
    Abstract: A dynamically vulcanized thermoplastic composition is provided which comprises a polymer blend of a thermoplastic olefinic resin, and an elastomeric halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a paraalkylstyrene. A process for preparing the dynamically vulcanized composition is also provided.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: May 7, 1991
    Assignee: Exxon Chemical Patents Inc.
    Inventors: Hsien C. Wang, Kenneth W. Powers, Robert C. Puydak, Narayanaswami R. Dharmarajan
  • Patent number: 4853002
    Abstract: Hydrogen sulfide is removed form a water stream comprising hydrogen sulfide and a high concentration of a Group IIA metal component such as magnesium and calcium components by maintaining the water stream at a specific acidic pH range and a specified temperature, and subjecting the resulting acidified hot water stream to vacuum flashing, in the absence of a stripping gas.
    Type: Grant
    Filed: April 15, 1988
    Date of Patent: August 1, 1989
    Assignee: Exxon Research and Engineering Company
    Inventors: Joseph L. Niedzwiecki, Ralph G. Wolfe
  • Patent number: 4793916
    Abstract: An improved process is provided for hydroconverting of coal in which a hydrocarbon-dispersible chromium compound is mixed with a hydrocarbonaceous material, in the absence of coal, to form a high metals-containing catalyst precursor concentrate which is heated in the presence of a hydrogen sulfide-containing gas to form a solid chromium-containing catalyst. A portion of the concentrate containing the catalyst is introduced into a diluent to which coal is added or in which coal is present. The resulting mixture is subjected to hydroconversion conditions to convert the coal to a hydrocarbonaceous oil product.
    Type: Grant
    Filed: April 3, 1987
    Date of Patent: December 27, 1988
    Assignee: Exxon Research and Engineering Company
    Inventors: Clyde L. Aldridge, Roby Bearden, Jr.
  • Patent number: 4719002
    Abstract: A slurry hydroconversion process is provided in which a catalyst precursor concentrate comprising an aqueous solution of phosphomolybdic acid and a heavy oil is contacted with hot hydrogen to vaporize the water from the concentrate. The resulting catalyst precursor concentrate is introduced into a hydrocarbonaceous chargestock and the resulting mixture is heated in the presence of added hydrogen to convert the phosphomolybdic acid to a solid molybdenum-containing catalyst. The resulting slurry is subjected to hydroconversion conditions.
    Type: Grant
    Filed: April 21, 1986
    Date of Patent: January 12, 1988
    Assignee: Exxon Research and Engineering Company
    Inventors: Francis X. Mayer, William E. Lewis
  • Patent number: 4701431
    Abstract: A rare earth stabilized aluminum deficient zeolite having the structure of faujasite is provided. The zeolite is produced by contacting a Y-type zeolite with a dealuminating agent to remove aluminum from the crystal structure of the zeolite and ion exchanging the zeolite with a specified amount of rare earth metal cations to stabilize the aluminum deficient zeolite.
    Type: Grant
    Filed: April 10, 1986
    Date of Patent: October 20, 1987
    Assignee: Exxon Research and Engineering Company
    Inventor: Lloyd A. Pine
  • Patent number: 4690802
    Abstract: An apparatus and method are provided to remove the heat during the regeneration of catalyst particles. A regenerator comprises a regeneration zone and a cooling zone having disposed therein a steam coil. The two zones are separated by a vertical partition open at both ends. Colder catalysts from the cooling zone flows into the regeneration zone and visa versa due to differences in densities of the fluidized particles in each zone. The flow of aeration steam to the cooling zone is controlled by a valve.
    Type: Grant
    Filed: December 31, 1985
    Date of Patent: September 1, 1987
    Assignee: Exxon Research and Engineering Company
    Inventor: Ronald J. Jenkinson
  • Patent number: 4637871
    Abstract: Slurry hydroconversion processes utilizing an aqueous solution of phosphomolybdic acid as catalyst precursor, which is subsequently converted to a solid molybdenum-containing catalyst, are improved when the catalyst precursor aqueous solution comprises a specified concentration of molybdenum derived from the phosphomolybdic acid. The improved hydroconversion processes and the improved method of preparing the catalyst are provided.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: January 20, 1987
    Assignee: Exxon Research and Engineering Company
    Inventors: Roby Bearden, Jr., Clyde L. Aldridge
  • Patent number: 4637870
    Abstract: Hydroconversion processes for converting oil, coal or mixtures thereof are provided utilizing a catalyst prepared by first forming an aqueous solution of phosphomolybdic acid and phosphoric acid at a specified ratio of atoms of P/Mo, and subsequently adding this solution to a hydrocarbon material, followed by heating in the presence of H.sub.2 and/or H.sub.2 S to form a solid molybdenum and phosphorus-containing catalyst.
    Type: Grant
    Filed: October 10, 1985
    Date of Patent: January 20, 1987
    Assignee: Exxon Research and Engineering Company
    Inventors: Roby Bearden, Jr., Clyde L. Aldridge
  • Patent number: 4618481
    Abstract: An alkaline absorbent composition comprising a severely hindered amino compound and an amine salt is provided. A process for the removal of H.sub.2 S from fluid mixtures using this absorbent composition to produce a very low level of H.sub.2 S in the treated fluid is also provided. The process is also suited for the selective removal of H.sub.2 S from fluid mixtures comprising H.sub.2 S and CO.sub.2.
    Type: Grant
    Filed: August 30, 1985
    Date of Patent: October 21, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventors: Fred J. Heinzelmann, Noah S. Rothblatt, James P. Glass, Jr., Geoffrey R. Say, George R. Chludzinski, Guido Sartori, W. S. Winston Ho
  • Patent number: 4605490
    Abstract: A noble metal-containing zeolitic catalyst having cracking activity and hydrogenation activity is pretreated by contacting the catalyst with a nitrogen-containing compound to decrease the cracking activity of the catalyst followed by treatment with hydrogen to recover the hydrogenation activity of the catalyst. The pretreated catalyst is used in a process for the hydrogenation of aromatic hydrocarbons.
    Type: Grant
    Filed: October 5, 1984
    Date of Patent: August 12, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventors: George J. Balinsky, Omer Biceroglu, Joe S. Lin
  • Patent number: 4604190
    Abstract: A catalyst is prepared by adding a water soluble aliphatic polyhydroxy compound such as a polyhydroxy alcohol or a carbohydrate (e.g., sucrose) to an aqueous solution of chromic acid and subsequently introducing the resulting mixture into a hydrocarbon material. The hydrocarbon-containing mixture is heated in the presence of hydrogen sulfide to convert the chromium catalyst precursor to a solid chromium-containing catalyst. Hydroconversion processes utilizing the catalyst to convert oil, coal, and mixtures thereof are also provided.
    Type: Grant
    Filed: August 5, 1985
    Date of Patent: August 5, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventors: Roby Bearden, Jr., Clyde L. Aldridge
  • Patent number: 4590036
    Abstract: A process for preventing corrosion of metals in contact with an alkaline liquid-acid gas absorbing solution comprises adding to the solution a corrosion inhibiting composition comprising soluble antimony and molybdenum salts in a specified weight ratio. The corrosion inhibiting composition is particularly suited for use with alkaline scrubbing solutions comprising a mixture of an alkali metal salt and an amine.
    Type: Grant
    Filed: October 3, 1984
    Date of Patent: May 20, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventor: Z. Andrew Foroulis
  • Patent number: 4587010
    Abstract: A fluid coking process is provided in which the fluidizing and stripping gas is introduced as a plurality of streams in the proximity of flow deflecting means positioned in the stripping portion of the coking reactor such as to provide a specified superficial gas velocity in the stripping portion.
    Type: Grant
    Filed: June 12, 1985
    Date of Patent: May 6, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventors: Don E. Blaser, Bong H. Chang, Charles L. Baker
  • Patent number: 4584091
    Abstract: A catalyst is provided which comprises a crystalline zeolite, discrete particles of phosphorus-containing alumina dispersed in a non-zeolitic inorganic oxide matrix. A catalytic cracking process utilizing the catalyst is also provided.
    Type: Grant
    Filed: December 31, 1984
    Date of Patent: April 22, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventor: Lloyd A. Pine
  • Patent number: 4579838
    Abstract: A catalyst is prepared by heating the reaction product of CrO.sub.3 and tert-butyl alcohol as catalyst precursor in a hydrocarbon medium in the presence of hydrogen sulfide to convert the catalyst precursor to a solid chromium-containing catalyst. Hydroconversion processes utilizing the catalyst to convert oil, coal, and mixtures thereof are also provided.
    Type: Grant
    Filed: April 29, 1985
    Date of Patent: April 1, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventors: Roby Bearden, Jr., Clyde L. Aldridge
  • Patent number: 4578182
    Abstract: A catalyst is prepared by heating the reaction product of CrO.sub.3 and tert-butyl alcohol as catalyst precursor in a hydrocarbon medium in the presence of hydrogen sulfide to convert the catalyst precursor to a solid chromium-containing catalyst. Hydroconversion processes utilizing the catalyst to convert oil, coal, and mixtures thereof are also provided.
    Type: Grant
    Filed: August 5, 1985
    Date of Patent: March 25, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventors: Roby Bearden, Jr., Clyde L. Aldridge
  • Patent number: 4569682
    Abstract: An electrically resistive flocculating agent is added to electrically conductive solid fines recovered from an electrofiltration zone. The dry flocculated solid fines including the flocculating agent are recycled to the electrofiltration zone in which a gaseous mixture containing fines is contacted with an electrically enhanced mass of solid contact particles.
    Type: Grant
    Filed: December 31, 1984
    Date of Patent: February 11, 1986
    Assignee: Exxon Research and Engineering Co.
    Inventors: Charles L. Baker, Jr., Rafael J. Puente-Duany