Patents Assigned to Chevron Research & Technology Company
  • Spraying device with a replaceable cartridge
    Patent number: 5213264
    Abstract: A spraying device having a sprayer head and an interchangeable, disposable, recyclable and/or biodegradable, and attachable cartridge, capable of diluting and dispensing a chemical. The device has a rotatable barrel valve to select whether to fill the cartridge, spray the diluted chemical, or prevent any flow. The device further has a pair of coupling tubes which permit the easy connection of the sprayer head to the cartridge in a way to cause, by aspiration, the partially diluted chemical to enter the sprayer head for further mixing and discharge. A rupturable or replaceable membrane is placed across the top of the cartridge to contain the concentrated chemical prior to use. A plug closure permits the addition of a chemical to the cartridge.
    Type: Grant
    Filed: October 11, 1990
    Date of Patent: May 25, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: James J. Styne
  • Process to remove benzene from refinery streams
    Patent number: 5210348
    Abstract: A substantially benzene-free product suitable for gasoline blending is formed from a benzene-containing refinery stream. At least about 30% of the benzene initially present in the stream is catalytically alkylated with C.sub.2 -C.sub.4 olefins to form alkylated products. Most preferably, the alkylation zone is present in the distillation column and the alkylated products drop to the lower portion of the column and are recovered with the heavy fraction. Alternatively, the alkylation zone is downstream of the distillation column and a secondary distillation column removes the heavier alkylated products. The remaining light fraction is hydrogenated to convert substantially all of the remaining non-alkylated benzene to cyclohexane and is isomerized to boost the octane of C.sub.5 -C.sub.7 paraffins, preferably in a single reactor.
    Type: Grant
    Filed: May 23, 1991
    Date of Patent: May 11, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: C. Richard Hsieh, Richard C. Robinson
  • Hydrous zirconium oxide dehydration catalyst
    Patent number: 5210363
    Abstract: Disclosed is a hydrous zirconium oxide catalyst for the dehydration of alcohols of the general formula ##STR1## to terminal olefins, as well as a method for preparing said catalyst. The catalyst provides high conversion of alcohol to olefin, high dehydration selectivity, and high selectivity for terminal olefin.
    Type: Grant
    Filed: March 17, 1992
    Date of Patent: May 11, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: William A. Sweeney
  • Process for alkylating aromatic polyols with higher carbon number alpha olefin oligomers
    Patent number: 5208390
    Abstract: A process for alkylating an aromatic polyol, such as catechol, with an alpha olefin oligomer of alpha olefins having from about 8 to 14 carbon atoms or mixtures thereof using an organic sulfonic acid catalyst which is soluble under the alkylation reaction conditions. The liquid alkyl aromatic polyol product is useful as a lubricating oil additive or lubricating oil base stock.
    Type: Grant
    Filed: October 25, 1991
    Date of Patent: May 4, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: Anatoli Onopchenko, Brian R. Kennedy
  • Synthesis of a crystalline silicoaluminophosphate
    Patent number: 5208005
    Abstract: A method is disclosed for preparing a silicoaluminophosphate molecular sieve, characterized in that the P.sub.2 O.sub.5 to alumina mole ratio at the surface is about 0.80 or less, the P.sub.2 O.sub.5 to alumina mole ratio of the bulk is 0.96 or greater and the silicon content at the surface is greater than that of the bulk, from a reaction mixture containing particles less than 80 microns in diameter.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: May 4, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Stephen J. Miller
  • Phosphate ester-based functional fluids containing an epoxide and a compatible streaming potential-inhibiting metal salt
    Patent number: 5205951
    Abstract: A functional fluid comprising an effective amount of a soluble streaming potential-inhibiting metal salt; an epoxide; and a major amount of a phosphate ester; wherein the metal salt is compatible with the epoxide component of the functional fluid at a temperature of about 260.degree. F. and the functional fluid has a wall current of less than 0.15 microamperes.
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: April 27, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Hugh S. MacKinnon
  • Trialkylamine complexes of certain borated alkyl catechols and lubricating oil compositions containing the same
    Patent number: 5202039
    Abstract: Borated alkyl catechols having a 3:2 mole ratio of catechol to boron can be stabilized by the addition of certain defined trialkylamines. Lubricating oils containing a 3:2 borated alkyl catechol-trialkylamine complex are effective in reducing oxidation, wear and deposits in an internal combustion engine.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: April 13, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: Vernon R. Small, Jr., Thomas V. Liston, Anatoli Onopchenko
  • Enhanced oil recovery method using an inverted nine-spot pattern
    Patent number: 5201815
    Abstract: In an inverted nine-spot pattern in an areally homogeneous reservoir, oil recovery is enhanced when the completion of the sidewells is restricted to the lower 20% of the reservoir. An inverted nine-spot pattern has a steam injection well at the center of the pattern and production wells at each of the four corners of the pattern and at the center of each side of the pattern. Steam is injected at the center well, and oil is produced from sidewells and corner wells.
    Type: Grant
    Filed: December 20, 1991
    Date of Patent: April 13, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: Ki C. Hong, Victor M. Ziegler
  • Zeolite SSZ-25
    Patent number: 5202014
    Abstract: A crystalline zeolite SSZ-25 is prepared using an adamantane quaternary ammonium ion as a template.
    Type: Grant
    Filed: November 6, 1991
    Date of Patent: April 13, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: Stacey I. Zones, Dennis L. Holtermann, Robert A. Innes, Theresa A. Pecoraro, Donald S. Santilli, James N. Ziemer
  • Zeolite SSZ-28
    Patent number: 5200377
    Abstract: A crystalline zeolite SSZ-28 is prepared using an N,N-dimethyl-tropinium or N,N-dimethyl-3-azonium bicyclo[3.2.2]nonane cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-28.
    Type: Grant
    Filed: March 2, 1992
    Date of Patent: April 6, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: Stacey I. Zones, Dennis L. Holtermann, Robert A. Innes
  • Method for using mode converted P- to S- wave data to delineate an anomalous geologic structure
    Patent number: 5200928
    Abstract: A method for using mode converted P- or S- wave data to delineate the surface of an anomalous geologic structure such as a salt dome is disclosed. Seismic wavefields are propagated from near the surface, through the earth, and through the anomalous geologic unit, so that a wavefield encounters the geologic unit at a non-normal incidence angle to generate a converted S- wave. Incidence angles of the direct arrival and converted waves are then determined. The intersection point of each converted S- wave raypath with each direct arrival raypath is determined, to provide a length of the raypaths. Travel times along the raypaths are determined, and a point on the interface of the anomalous geologic unit with the surrounding earth is determined by comparing raypath travel time differences with the recorded arrival time differences.
    Type: Grant
    Filed: November 7, 1991
    Date of Patent: April 6, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Mark K. MaCleod
  • Platinum-rhenium catalyst
    Patent number: 5198404
    Abstract: A catalyst composition and process for using said catalyst is disclosed wherein the catalyst comprises 0.24 to 0.26 weight percent platinum and 0.48 to 0.52 weight percent rhenium disposed on an alumina spheroidal carrier.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: March 30, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: John H. Arndt, Robert L. Jacobson
  • Calibrating satellite altimetry measurements of geoidal height
    Patent number: 5198820
    Abstract: Satellite-altimetry measurements of ocean water height are calibrated by measuring an ocean water height by using satellite-altimetry at one location during a time period, measuring another ocean water height during the same time period against a known reference on a fixed offshore structure at another location near the first location, and comparing these two sets of measurements. One way of measuring ocean water height against a known reference point on a fixed offshore structure is by measuring the time it takes for pulse of energy to travel from a transmitter at that reference point to the sea surface, and back to a receiver. Another way of measuring ocean water height against a known reference point is by using water-sensitive sensors placed on the fixed offshore structure at known distances from the known reference point.
    Type: Grant
    Filed: September 18, 1991
    Date of Patent: March 30, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Peter Graebner
  • Detergent grade to C.sub.10 to C.sub.28 olefins, (C.sub.10 to C.sub.28 alkyl) benzenes and (C.sub.10 to C.sub.28 alkyl) benzene sulfonates and process for preparing same using a phosphite containing catalyst
    Patent number: 5196625
    Abstract: A dimerization process for producing linear and/or mono-branched C.sub.10 to C.sub.28 olefins using dimerization catalysts and new C.sub.10 to C.sub.28 olefins mixtures are disclosed. The C.sub.10 to C.sub.28 olefin product is especially useful for the production of biodegradable alkylbenzene sulfonates detergents and intermediates therefor.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: March 23, 1993
    Assignee: Chevron Research & Technology Company
    Inventors: Richard S. Threlkel, Victor P. Kurkov
  • Detergent grade to C.sub.10 to C.sub.28 olefins, (C.sub.10 to C.sub.28 alkyl)benzenes and C.sub.10 to C.sub.28 alkyl) benzene sulfonates and process for preparing same using a phosphine containing catalyst
    Patent number: 5196624
    Abstract: A dimerization process for producing linear and/or mono-branched C.sub.10 to C.sub.28 olefins using dimerization catalysts and new C.sub.10 to C.sub.28 olefins mixtures are disclosed. The C.sub.10 to C.sub.28 olefin product is especially useful for the production of biodegradable alkylbenzene sulfonates detergents and intermediates therefor.
    Type: Grant
    Filed: May 6, 1992
    Date of Patent: March 23, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: Richard S. Threlkel, Victor P. Kurkov, Gar L. Woo
  • Multivalent ion tolerant steam-foaming surfactant composition for use in enhanced oil recovery operations
    Patent number: 5193618
    Abstract: A method for recovering hydrocarbons from a reservoir during gas injection into the reservoir comprises at least periodically injecting a gas comprising steam and a foam-forming composition which includes at least one steam foam diversion surfactant into a reservoir which contains at least one multivalent cation. The foam forming composition comprises water, an effective foam-forming amount of the surfactant which preferably comprises an alkyl aromatic sulfonate and a precipitation control additive. This precipitation-control additive preferably comprises an alpha-olefin sulfonate dimer (AOSD). The method further comprises contacting the hydrocarbons in the resevoir with the foam and the gas so as to assist in the recovery of hydrocarbons from the reservoir.
    Type: Grant
    Filed: September 12, 1991
    Date of Patent: March 16, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: William Loh, Rawls H. Frazier, Jr.
  • Synthesis of SSZ-16 zeolite catalyst
    Patent number: 5194235
    Abstract: A method for preparing the zeolite SSZ-16 wherein the organic template used in the synthesis has the formula: ##STR1## wherein n is 3, 4, or 5.
    Type: Grant
    Filed: August 27, 1992
    Date of Patent: March 16, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Stacey I. Zones
  • Micro-slug injection of surfactants in an enhanced oil recovery process
    Patent number: 5193617
    Abstract: A method for introducing a surfactant into an oil bearing formation includes plurality of a micro-slug injections of surfactant. Each micro-slug injection comprises an "on time" in which the surfactant is introduced into the formation and which is based upon the time needed for the surfactant to generate foam in the formation and a "off time" in which surfactant flow is stopped and is based upon the time period for the generated foam to degrade to a predetermined degree in the formation.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: March 16, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Adrian D'Souza
  • Fuel additive compositions containing poly(oxyalkylene) amines and polyalkyl hydroxyaromatics
    Patent number: 5192335
    Abstract: A fuel additive composition comprising:(a) a poly(oxyalkylene) amine having at least one basic nitrogen atom and a sufficient number of oxyalkylene units to render the poly(oxyalkylene) amine soluble in hydrocarbons boiling in the gasoline or diesel range; and(b) a polyalkyl hydroxyaromatic compound or salt thereof wherein the polyalkyl group has sufficient molecular weight and carbon chain length to render the polyalkyl hydroxyaromatic compound soluble in hydrocarbons boiling in the gasoline or diesel range.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: March 9, 1993
    Assignee: Chevron Research and Technology Company
    Inventor: Richard E. Cherpeck
  • Process for regenerating sulfur contaminated reforming catalysts
    Patent number: RE34250
    Abstract: The present invention is a process for regenerating a sulfur-contaminated, highly selective, large-pore zeolite catalyst. It comprises a multistep process involving exposure of the catalyst to a combination of oxidizing conditions, reducing conditions and treatment with a halogen acid gas. These conditions are effective to agglomerate a Group VIII metal and remove sulfur. Thereafter, the catalyst is oxychlorinated to redisperse the Group VIII metal over the catalyst surface. A carbon removal step is optionally included.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: May 11, 1993
    Assignee: Chevron Research and Technology Company
    Inventors: Dean A. Van Leirsburg, Donald H. Mohr, Paul W. Tamm, Robert L. Jacobson, Thomas R. Hughes, Charles R. Wilson