Patents Represented by Attorney, Agent or Law Firm Estelle C. Bakun
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Patent number: 6737175Abstract: A method for inhibiting metal dusting corrosion of surfaces exposed to supersaturated carbon environments comprising constructing said surfaces of, or coating said surfaces with a copper based alloy. The invention is also directed to a composition resistant to metal dusting.Type: GrantFiled: December 7, 2001Date of Patent: May 18, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Trikur Anantharaman Ramanarayanan, Changmin Chun, James Dirickson Mumford
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Patent number: 6716886Abstract: A process of enhancing both the activity and the methane selectivity of a Dispersed Active Metal (“DAM”) hydrogenation catalyst is disclosed wherein the DAM undergoes low temperature oxidation in a slurry phase to form a stable, unique oxidized catalyst precursor that is subsequently reduced to form an enhanced catalyst by treatment with hydrogen-containing gas at elevated temperature, wherein reducible promoter metals comprising one or more of rhenium, ruthenium, palladium, iron and cobalt are added to the DAM. The promoter metals are mixed with the oxidized catalyst precursor as a solution of their reducible salts. The oxidized catalyst precursors are again recovered from the mixture and treated with hydrogen-containing gas to simultaneously form the metals and reactivate the DAM catalyst.Type: GrantFiled: November 1, 2002Date of Patent: April 6, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Alla Jurievna Krylova, Albert L'Vovich Lapidus, Lilia Vadimovna Sineva, Michel A. Daage, Russell John Koveal
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Patent number: 6716358Abstract: The invention includes a method for demulsification of water-in-oil emulsions.Type: GrantFiled: January 28, 2003Date of Patent: April 6, 2004Assignee: ExxonMobil Research and Engineering CompanyInventor: Ramesh Varadaraj
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Patent number: 6709571Abstract: This invention is directed to an extinction recycle naphtha hydrocracking processes. Large pore zeolite catalysts with Constraint Indices less than 2, such as USY or beta, which are loaded with noble metals such as Pt or Pd or with transition metals such as Ni in combination with Mo or W are employed. Preferably, low hydrogen partial pressures, and a feedstock relatively rich in hydrogen and low in aromatics content, are used, in order to extend catalyst cycle length.Type: GrantFiled: July 20, 1999Date of Patent: March 23, 2004Assignee: Mobil Oil CorporationInventors: Kenneth J. Del Rossi, David A. Pappal, Brenda H. Rose
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Patent number: 6706661Abstract: A process of enhancing both the activity and the methane selectivity of a Dispersed Active Metal (“DAM”) hydrogenation catalyst is disclosed wherein the DAM undergoes low temperature oxidation in a slurry phase to form a stable, unique oxidized catalyst precursor that is subsequently reduced to form an enhanced catalyst by treatment with hydrogen-containing gas at elevated temperature, wherein reducible promoter metals comprising one or more of rhenium, ruthenium, palladium, iron and cobalt are added to the DAM. The promoter metals are mixed with the oxidized catalyst precursor as a solution of their reducible salts. The oxidized catalyst precursors are again recovered from the mixture and treated with hydrogen-containing gas to simultaneously form the metals and reactivate the DAM catalyst.Type: GrantFiled: September 1, 2000Date of Patent: March 16, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Alla Jurievna Krylova, Albert L'Vovich Lapidus, Lilia Vadimovna Sineva, Michel A. Daage, Russell John Koveal
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Patent number: 6692838Abstract: The invention includes a composition of matter which is resistant to metal dusting and a method for preventing metal dusting on metal surfaces exposed to carbon supersaturated environments.Type: GrantFiled: March 15, 2002Date of Patent: February 17, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Trikur Anantharaman Ramanarayanan, ChangMin Chun
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Patent number: 6692711Abstract: Sour natural gas is processed to remove the sulfur compounds and recover C4+/C5+ hydrocarbons by scrubbing the gas with an amine solution to remove most of the sulfur, followed cooling the gas to remove C4+/C5+ hydrocarbons and more sulfur compounds as liquid condensate to produce a gas having less than 20 vppm of total sulfur. The condensate is sent to a fractionator to recover the C4+/C5+ hydrocarbons. The sulfur and hydrocarbon reduced gas is contacted first with zinc oxide and then nickel, to produce a gas having less than 10 vppb of total sulfur which is passed into a synthesis gas generating unit to form a very low sulfur synthesis gas comprising a mixture of H2 and CO. This synthesis gas is useful for hydrocarbon synthesis with increased life of the hydrocarbon synthesis catalyst and greater hydrocarbon production from the hydrocarbon synthesis reactor. Contacting the synthesis gas with zinc oxide further reduces the sulfur content to below 3 vppb.Type: GrantFiled: June 2, 2000Date of Patent: February 17, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Dennis G. Alexion, Robert B. Fedich, John C. Wilbur, James H. Taylor, Jr., James P. Glass, Jr., Geoffrey R. Say, Richard P. O'Connor
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Patent number: 6689928Abstract: The invention is a method and catalyst for selectively and efficiently producing short chain linear &agr;-olefins. The method includes contacting olefinic monomers under oligomerization conditions with the catalyst composition which comprises a composition prepared in situ by reacting a nickel compound selected from the group consisting of halides, hydrides, triflates, acetates, borates, C1, through C12 alkyl, C1 through C12 alkoxy, C3 through C12 cycloalkyl, C3 through C12 cycloalkoxy, aryl, thiolates, carbon monoxide, cyanate, olefins including diolefins and cycloolefins, and any other moiety into which a monomer can insert and mixtures thereof, with an amine ligand wherein said ligand is a nitrogen-containing ligand having one or more nitrogen atoms.Type: GrantFiled: September 25, 2001Date of Patent: February 10, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Robert Timothy Stibrany, Michael Gerard Matturro, Stephen Zushma, Abhimanyu Onkar Patil
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Patent number: 6677279Abstract: The invention relates to a variety of uses for novel carbon monoxide containing polymers. More specifically, the invention employs the use of low molecular weight polymers containing carbon monoxide for use as adhesive additives and as fluids (e.g., solvents and synthetic base stocks).Type: GrantFiled: February 7, 2003Date of Patent: January 13, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Abhimanyu Onkar Patil, Donald Norman Schulz, Michael Gerard Matturro, Richard Henry Schlosberg
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Patent number: 6677281Abstract: A lubricant having improved rust protection and demulsibility has a specific balance of an ashless dispersant and a rust inhibitor additive combination comprising a metallic and ashless rust inhibitor.Type: GrantFiled: March 22, 2002Date of Patent: January 13, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Willie Allan Givens, Jr., Angela Stefana Galiano-Roth
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Patent number: 6673737Abstract: A novel supported ionic liquid moiety which may further comprise immobilized ionic fluids and catalytic material is described. A method for making the composition is also described.Type: GrantFiled: August 3, 2001Date of Patent: January 6, 2004Assignee: ExxonMobil Research and Engineering CompanyInventors: Christian Peter Mehnert, Raymond Arnold Cook
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Patent number: 6669872Abstract: An electrical oil having reduced gassing tendency includes a major amount of a paraffinic or naphthenic basestock and a blend of certain hindered phenols, especially a blend of 2,6-di-t-butyl phenol and 2,6-di-t-butyl cresol. A further enhanced gassing tendency can be provided to the electrical oil by including a tolyltriazole derivative.Type: GrantFiled: July 13, 2001Date of Patent: December 30, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Christopher Jeffrey Still Kent, Jacob B. Angelo
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Patent number: 6652772Abstract: Disclosed are phosphate ester base fluids and aircraft hydraulic fluids containing mixed n-butyl/isobutyl phosphate ester components. The disclosed aircraft hydraulic fluids contain from about 30 to about 95 weight percent, based on the total weight of the fluid, of n-butyl diisobutyl phosphate or di-n-butyl isobutyl phosphate or a mixture thereof; from 0 to about 15 weight percent, based on the total weight of the fluid, of one or more triaryl phosphates; and an effective amount of a viscosity index improver, an acid control additive and an erosion inhibitor.Type: GrantFiled: May 1, 2001Date of Patent: November 25, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Shlomo Antika, Marc-Andre Poirier
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Patent number: 6649080Abstract: Disclosed are phosphate ester base fluids and aircraft hydraulic fluids containing a novel combination of phosphate ester components. The disclosed aircraft hydraulic fluids contain from about 30 to about 45 weight percent, based on the total weight of the fluid, of tri-iso-butyl phosphate; from about 30 to about 45 weight percent, based on the total weight of the fluid, of tri-n-butyl phosphate; from about 10 to about 15 weight percent, based on the total weight of the fluid, of one or more triaryl phosphates; and an effective amount of a viscosity index improver, an acid control additive and an erosion inhibitor.Type: GrantFiled: September 28, 2001Date of Patent: November 18, 2003Assignees: ExxonMobil Research and Engineering Company, Chevron USA, Inc.Inventors: Mark E. Okazaki, Adrian D'Souza, Shlomo Antika
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Patent number: 6648988Abstract: Furnace run length extension by fouling control utilizing a pigging-passivation process.Type: GrantFiled: August 17, 2001Date of Patent: November 18, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Trikur Anantharaman Ramanarayanan, Ashok Uppal, Changmin Chun
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Patent number: 6642281Abstract: There is provided an improved system and process for the catalytic hydrogenation of carbon monoxide to form a mixture of hydrocarbons utilizing a plurality of reactors in series. Synthesis gas entering the system under pressure is partially converted in at least one initial stage reactor and the effluent therefrom introduced into a final stage reactor. In the at least one initial stage reactor, a portion of the catalyst is continuously or periodically removed with some hydrocarbons and treated to renew, or renew and enhance it, and returned. The treatment comprises reducing the hydrocarbon context of the withdrawn mixture, heating to a temperature above at least one of the metals in the catalyst thereby forming a melt, removing any slag forming on the melt, cooling the melt and reducing the particle size of the resulting solid to a fine powder of renewed catalyst.Type: GrantFiled: September 1, 2000Date of Patent: November 4, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: David Chester Long, Michel A. Daage, Russell John Koveal
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Patent number: 6624204Abstract: A method is disclosed for renewing the activity of a Dispersed Active Metal (DAM) catalyst during operation of a reactor wherein the hydrogenation of carbon monoxide to produce a mixture of hydrocarbons is being carried out comprising withdrawing a mixture of hydrocarbons and a portion of the DAM catalyst, reducing the hydrocarbon content thereof, heating the mixture above the melting temperature of at least one of the metals of the DAM to form a melt, removing any slag that forms on the melt, cooling the melt to form a solid, reducing the particle size thereof to form a renewed particulate DAM catalyst, which is then returned to the reactor. Wherein the DAM catalyst is a Raney catalyst, a leachable metal is added to the reduced hydrocarbon mixture or the melt under non-oxidizing conditions and, after the solid is reduced to a fine particle size, extracting the leachable metal with caustic.Type: GrantFiled: September 1, 2000Date of Patent: September 23, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Michel A. Daage, Russell John Koveal, David Chester Long, Leroy Russell Clavenna, Trikur Anantharaman Ramanarayaman, James Dirickson Mumford, Claude Clarence Culross
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Patent number: 6607568Abstract: Diesel fuels or blending stocks having excellent lubricity, oxidative stability and high cetane number are produced from non-shifting Fischer-Tropsch processes by separating the Fischer-Tropsch product into a lighter and heavier fractions, e.g., at about 700° F., subjecting the 700° F.+ fraction to hydro-treating, and combining the 700° F.− portion of the hydrotreated product with the lighter fraction that has not been hydrotreated.Type: GrantFiled: January 26, 2001Date of Patent: August 19, 2003Assignee: ExxonMobil Research and Engineering CompanyInventors: Robert Jay Wittenbrink, Richard Frank Bauman, Paul Joseph Berlowitz, Bruce Randall Cook
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Patent number: 6599866Abstract: The incorporation of a minor amount of a salt of pentafluorobenzene sulfonic acid to phosphate ester based functional fluids enhances the anti-erosion properties of the fluid.Type: GrantFiled: February 15, 2002Date of Patent: July 29, 2003Assignee: ExxonMobil Research and Engineering CompanyInventor: Marc-André Poirier
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Patent number: 6590000Abstract: The invention includes a method for defoaming aqueous or non-aqueous foams comprising placing a sonicator probe directly into said foam and thereafter sonicating said foam in pulse mode at a sonication energy of at least about 25 watts/cm2 for a time required to collapse the foam.Type: GrantFiled: March 9, 2001Date of Patent: July 8, 2003Assignee: ExxonMobil Research and Engineering CompanyInventor: Ramesh Varadaraj