Patents Assigned to Chevron Research Company
  • Patent number: 5603821
    Abstract: A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template.
    Type: Grant
    Filed: September 28, 1994
    Date of Patent: February 18, 1997
    Assignee: Chevron Research Company
    Inventors: Lawrence W. Jossens, Donald S. Santilli, James N. Ziemer
  • Patent number: 5593573
    Abstract: Sulfuric acids or salts thereof are used to remove metals, particularly organically-bound calcium, from hydrocarbonaceous feedstocks. An aqueous solution of the acid or its salts is used to extract the metals from the feedstock prior to processing.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: January 14, 1997
    Assignee: Chevron Research Company
    Inventor: David C. Kramer
  • Patent number: 5464623
    Abstract: Insecticidal pellet compositions of N-hydrocarboyl phosphoroamidothioates and phosphoroamidodithioates are provided. These compositions have improved odor control, thermal stability, attrition resistance, bulk density and handling characteristics over the powdered forms of the insecticides. Methods are provided for making such pellets, and in particular, an extrusion method is provided in which the dry insecticidal composition is mixed with from 3-25% of a solvent to form a consistency of damp sandy loam and then extruded.
    Type: Grant
    Filed: August 18, 1989
    Date of Patent: November 7, 1995
    Assignee: Chevron Research Company
    Inventors: Jimmy H. Chan, Rodrick I. Satre, James H. Trusler, Sadanand G. Memula
  • Patent number: 5409598
    Abstract: On-stream catalyst replacement hydroprocessing method wherein an upstream mixture of hydrogen and hydrocarbon liquid counter flows through a downwardly moving bed of hydroprocessing catalyst in a reactor vessel. The mixed feed stream of hydrogen and liquid hydrocarbon components enters a surge zone between the lower end of the reactor and a plenum zone to form a common pool under a conical support for the lower end of the downflowing catalyst bed. The mixed feed enters the plenum chamber through a plurality of passageways extending downwardly from the plenum zone to the same depth adjacent the lower end of the surge zone so that the liquid component normally prevents hydrogen from establishing independent paths before entering the plenum zone. Separation of the hydrogen and hydrocarbon liquid components from the mixed feed is thus assured to occur in the plenum zone directly below the pervious conical support to form a plurality of stepped concentric local reservoir rings under the conical support.
    Type: Grant
    Filed: March 21, 1994
    Date of Patent: April 25, 1995
    Assignee: Chevron Research Company
    Inventors: David C. Kramer, Bruce E. Stangeland, David S. Smith, James T. McCall, Georgieanna Scheuerman, Robert W. Bachtel
  • Patent number: 5393407
    Abstract: A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template.
    Type: Grant
    Filed: June 26, 1992
    Date of Patent: February 28, 1995
    Assignee: Chevron Research Company
    Inventors: Stacey I. Zones, Dennis L. Holtermann, Lawrence W. Jossens, Donald S. Santilli, Andrew Rainis
  • Patent number: 5364546
    Abstract: Disclosed are alkylphenyl poly(oxyalkylene) aminocarbamates having at least one basic nitrogen and an average molecular weight of about 800 to 6,000 and wherein the alkyl group contains at least 40 carbon atoms. Also disclosed are lubricating oil compositions and concentrates containing said alkylphenyl poly(oxyalkylene) aminocarbamates.
    Type: Grant
    Filed: April 19, 1990
    Date of Patent: November 15, 1994
    Assignee: Chevron Research Company
    Inventor: Thomas F. Buckley, III
  • Patent number: 5315053
    Abstract: A lubricating oil composition comprising a normally liquid alpha-olefin oligomer consisting essentially of repeating units having the structural formula: ##STR1## wherein x represents an integer from 3 to 11, inclusive; andy represents the number of repeating units in the oligomer such that the weight average molecular weight is from about 5,000 to about 20,000;said oligomer having from about 70 to 100 percent head-to-tail alignment of the repeating units of the oligomer. Preferably the weight average molecular weight of the oligomer is from 5,000 to about 10,000; and said oligomer is further characterized as having a dispersity of less than about 5.5, and a Z average molecular weight of less than about 24,000.
    Type: Grant
    Filed: July 6, 1993
    Date of Patent: May 24, 1994
    Assignee: Chevron Research Company
    Inventors: David L. Beach, Paul G. Bercik, Neal E. Morganson
  • Patent number: 5312460
    Abstract: Disclosed is a fuel composition comprising a hydrocarbon boiling in the gasoline or diesel range and from about 30 to about 5,000 parts per million of an alkylphenyl poly(oxypropylene) aminocarbamate having at least one basic nitrogen and an average molecular weight of about 600 to 6,000 and wherein the alkyl group is substantially straight-chain of at least 15 carbon atoms. The instant invention is based on the discovery that use of the unique hydrocarbyl group, i.e., an alkylphenyl group wherein the alkyl group is derived from a substantially straight-chain alkyl group of at least 15 carbon atoms imparts to the alkylphenyl poly(oxypropylene) aminocarbamate not only lubricating oil compatibility but also an unexpected decrease in crankcase deposits.
    Type: Grant
    Filed: November 17, 1992
    Date of Patent: May 17, 1994
    Assignee: Chevron Research Company
    Inventor: Thomas F. Buckley, III
  • Patent number: 5312965
    Abstract: Disclosed are alkylphenyl poly(oxypropylene) aminocarbamates having at least one basic nitrogen and an average molecular weight of about 600 to 6,000 and wherein the alkyl group is substantially straight-chain of at least 15 carbon atoms. Also disclosed are lubricating oil compositions and concentrates containing said alkylphenyl poly(oxypropylene) aminocarbamates.
    Type: Grant
    Filed: November 27, 1991
    Date of Patent: May 17, 1994
    Assignee: Chevron Research Company
    Inventor: Thomas F. Buckley
  • Patent number: 5270018
    Abstract: Apparatus for withdrawing particulate spent catalyst particles from a packed, non-fluidized bed of such particles in contact with a liquid medium within a vessel wherein the apparatus is a withdrawal conduit or pipe which has an inlet that opens within the bottom of the bed and faces generally downwardly so that a first section extends upwardly from the inlet, and a second section extends downwardly, and the spent catalyst particles exits the packed bed through a uniform and continuous flow path opening into a solids recovery vessel whose pressure is controlled to regulate flow of such spent catalyst from the reaction vessel independent of the rate of flow through the withdrawal conduit.
    Type: Grant
    Filed: December 11, 1991
    Date of Patent: December 14, 1993
    Assignee: Chevron Research Company
    Inventor: Georgieanna L. Scheuerman
  • Patent number: 5261461
    Abstract: A liner pipe comprising sections of polyethylene pipe connected by articulated gasketed joints of bell and spigot design which are specifically adapted for ease of compression lining of large diameter pipe with minimum disruption to surface traffic and pipeline flow.
    Type: Grant
    Filed: August 16, 1989
    Date of Patent: November 16, 1993
    Assignee: Chevron Research Company
    Inventors: Harold R. Smith, Eric E. Kemp
  • Patent number: 5246605
    Abstract: Disclosed is a grease composition comprising a major amount of a lubricating oil base vehicle, a polyurea gellant in an amount sufficient to thicken the base vehicle to grease consistency, an alkali-metal borate in an amount sufficient to impart extreme-pressure properties to the grease and from 0.1 to 10.0 mass percent of antimony dithiocarbamate.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: September 21, 1993
    Assignee: Chevron Research Company
    Inventor: Paul F. Vartanian
  • Patent number: 5246604
    Abstract: Disclosed is a grease composition comprising a major amount of a lubricating oil base vehicle, a lithium gellant in an amount sufficient to thicken the base vehicle to grease consistency, an alkali-metal borate in an amount sufficient to impart extreme-pressure properties to the grease and from 0.1 to 10.0 mass percent of antimony dithiocarbamate.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: September 21, 1993
    Assignee: Chevron Research Company
    Inventor: Paul F. Vartanian
  • Patent number: 5238662
    Abstract: Disclosed is a process for recovering precious metals using a combination of smelting and an effective utilization of molten salt chlorination. More specifically, disclosed is a process including the steps of (i) contacting, for example, a matte with a chloride salt containing at least one of potassium, cesium or rubidium, but not sodium or lithium to form a matte/salt solids mixture, (ii) introducing the solids mixture into a chloride melt having a temperature ranging from 300.degree. C. to 650.degree. C., said melt containing at least one of potassium, cesium, rubidium, sodium or lithium, (iii) introducing a chlorine containing gas into the melt, and (iv) maintaining the salt ratio in the matte/salt mixture at a stoichiometrically equivalent amount with the precious metals and base metals contained in the matte.
    Type: Grant
    Filed: May 11, 1992
    Date of Patent: August 24, 1993
    Assignee: Chevron Research Company
    Inventor: Michael Dubrovsky
  • Patent number: 5177276
    Abstract: An alpha-olefin oligomer consisting essentially of repeating units having the structural formula: ##STR1## wherein x represents an integer from 3 to 11, inclusive; andy represents the number of repeating units in the oligomer such that the weight average molecular weight is from about 5,000 to about 20,000;said oligomer having from about 70 to 100 percent head-to-tail alignment of the repeating units of the oligomer. Preferably the weight average molecular weight of the oligomer is from 5,000 to about 10,000; and said oligomer is further characterized as having a dispersity of less than about 5.5, and a Z average molecular weight of less than about 24,000.
    Type: Grant
    Filed: November 4, 1988
    Date of Patent: January 5, 1993
    Assignee: Chevron Research Company
    Inventors: David L. Beach, Paul G. Bercik, Neal E. Morganson
  • Patent number: 5166111
    Abstract: A crystalline low-aluminum boron beta zeolite is prepared using a diquaternary ion as a template.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: November 24, 1992
    Assignee: Chevron Research Company
    Inventors: Stacey I. Zones, Dennis L. Holtermann, Lawrence W. Jossens, Donald S. Santilli, Andrew Rainis
  • Patent number: 5166112
    Abstract: The present invention is a process and a catalyst for isomerizing normal and slightly branched C.sub.4 to C.sub.7 hydrocarbons. The catalyst comprises a Group VIII metal on Beta zeolite.
    Type: Grant
    Filed: October 3, 1991
    Date of Patent: November 24, 1992
    Assignee: Chevron Research Company
    Inventor: Dennis L. Holtermann
  • Patent number: 5160601
    Abstract: Novel hydrocarbon conversion catalysts and methods for their preparation are disclosed. The catalysts are particularly appropriate for the conversion of hydrocarbon feeds to high octane gasoline, while increasing light cycle oil and decreasing heavy cycle oil yield. The catalyst comprises a zeolite, a cogelled silica-alumina matrix, and clay.
    Type: Grant
    Filed: September 4, 1990
    Date of Patent: November 3, 1992
    Assignee: Chevron Research Company
    Inventor: Theresa A. Pecoraro
  • Patent number: 5149421
    Abstract: The present invention relates to a process for catalytically dewaxing a hydrocarbon oil feedstock by contacting the feedstock with a combination of a catalyst comprising an intermediate pore size silicoaluminophosphate molecular sieve and a hydrogenation component and an intermediate pore size aluminosilicate zeolite catalyst.
    Type: Grant
    Filed: August 31, 1989
    Date of Patent: September 22, 1992
    Assignee: Chevron Research Company
    Inventor: Stephen J. Miller
  • Patent number: 5141660
    Abstract: Borated alkyl catechols can be stabilized by the addition of certain defined monoalkylamines.Lubricating oils containing a borated alkyl catecholmonoalkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.
    Type: Grant
    Filed: September 27, 1989
    Date of Patent: August 25, 1992
    Assignee: Chevron Research Company
    Inventors: Vernon R. Small, Jr., Thomas V. Liston, Anatoli Onopchenko