Patents Assigned to Chevron Research Company
  • Patent number: 4925579
    Abstract: Lubricating oil compositions containing multifunctional additives, e.g. sludge dispersants and V.I. improvers, and the use of the composition to lubricate the crankcase of an internal combustion engine are disclosed. The additives are prepared by hydroperoxidizing ethylene copolymers and terpolymers.
    Type: Grant
    Filed: October 21, 1982
    Date of Patent: May 15, 1990
    Assignee: Chevron Research Company
    Inventor: Jeffrey E. Stemke
  • Patent number: 4925549
    Abstract: A process for removing residual sulfur from a hydrotreated naphtha feedstock is disclosed. The feedstock is contacted with molecular hydrogen under reforming conditions in the presence of a less sulfur sensitive reforming catalyst, thereby converting trace sulfur compounds to H.sub.2 S, and forming a first effluent. The first effluent is contacted with a solid sulfur sorbent, removing the H.sub.2 S and forming a second effluent. The second effluent is contacted with a highly selective reforming catalyst under severe reforming conditions.
    Type: Grant
    Filed: March 10, 1988
    Date of Patent: May 15, 1990
    Assignee: Chevron Research Company
    Inventors: Richard C. Robinson, Robert L. Jacobson, Leslie A. Field
  • Patent number: 4921594
    Abstract: Lubricating oils are prepared by a process whereby a hydrocarbonaceous feedstock is hydrocracked and subsequently dewaxed over a crystalline silicoaluminophosphate SAPO-11 containing platinum and/or palladium.
    Type: Grant
    Filed: August 17, 1987
    Date of Patent: May 1, 1990
    Assignee: Chevron Research Company
    Inventor: Stephen J. Miller
  • Patent number: 4915786
    Abstract: An emulsifier comprising the reaction product of a substituted succinic anhydride and a nonionic water-soluble compound having 1 to 3 reactive polar groups. There is also disclosed a stable substituted succinic anhydride/nonionic emulsifier composition, a method for imparting water repellency to surfaces containing groups reactive to anhydrides, and a method for the sizing of paper using said composition.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: April 10, 1990
    Assignee: Chevron Research Company
    Inventor: W. Alan Sweeney
  • Patent number: 4915928
    Abstract: Disclosed is a process for removing selenium from wastewater effluent. The processd includes the steps of;(i) contacting a selenide containing wastewater and a strong-base anion exchange resin to absorb selenide on the resin;(ii) eluting the ion exchange resin with an eluant which is effective for stripping selenide therefrom; and(iii) recovering elemental selenium from the selenide containing eluate resulting from step (ii). Also disclosed is a process for regenerating the ion exchange resin by treatment of the resin with an acidic chlorate solution.
    Type: Grant
    Filed: March 31, 1989
    Date of Patent: April 10, 1990
    Assignee: Chevron Research Company
    Inventor: Paul J. Marcantonio
  • Patent number: 4915169
    Abstract: The present invention relates to an improved method for controlling pH in the liquid and vapor phases of wet steam having such phases formed in a steam generation system from feedwater having therein at least one carbonate species which in the presence of steam forms a vapor phase component tending to lower the pH of the vapor phase of the steam upon condensation and a liquid phase component tending to raise the pH of the liquid phase of the steam. It comprises: (a) converting the feedwater in a steam generation system to steam having a vapor phase and a liquid phase; and (b) adding to the steam generation system, a heterocyclic, multifunctional, nitrogen-containing compound capable of forming a nonvolatile anionic component and a cationic component that, in the presence of said system, yields hydrogen ions for reducing the pH of the liquid phase of said steam and an alkaline component for increasing the pH of the vapor phase of said steam upon condensation.
    Type: Grant
    Filed: January 13, 1989
    Date of Patent: April 10, 1990
    Assignee: Chevron Research Company
    Inventors: Rong J. Hwang, Andrew Nigrini, Marion G. Reed
  • Patent number: 4913831
    Abstract: Compositions which comprise a calcium magnesium acetate double salt are useful in deicing compositions. Deicing compositions comprising those compositions and processes for their preparation are described.
    Type: Grant
    Filed: January 14, 1988
    Date of Patent: April 3, 1990
    Assignee: Chevron Research Company
    Inventors: Harold E. Todd, Jr., Daniel L. Walters
  • Patent number: 4913235
    Abstract: A method of increasing the viscosity of CO.sub.2 at least three-fold by adding (1) a viscosifying amount of a polymer having a Minimum Solubility Parameter of 6.85 or less and a plurality of electron donor atoms selected from the group consisting of O, N, and S, and (2) a sufficient amount of a cosolvent to form a one-phase solution, said cosolvent being capable of (a) dissolving at least 2% by weight of CO.sub.2 at 25.degree. C. and 900 psig, and (b) forming a one-phase mixture with the polymer when the mixture contains 10 weight percent cosolvent at ambient temperature and a pressure sufficient to maintain the cosolvent in the liquid phase. New compositions containing CO.sub.2, the defined polymer and cosolvent are also claimed as is a method for recovering oil from underground formations using a viscosified CO.sub.2.
    Type: Grant
    Filed: July 14, 1987
    Date of Patent: April 3, 1990
    Assignee: Chevron Research Company
    Inventors: Thomas V. Harris, Cyrus A. Irani, Wayne R. Pretzer
  • Patent number: 4913236
    Abstract: In its broadest aspect, the present invention provides a method for inhibiting silica dissolution in the vicinity of a well penetrating a hydrocarbon-containing formation. It includes: (a) adding an amount of a chmeical compound to a wet steam which forms an alkaline component in the vapor phase of the wet steam effective to inhibit corrosion in the vicinity of the vapor phase condensate; (b) separating the wet steam into the liquid phase and the vapor phase; (c) removing an amount of the liquid phase from the wet steam effective to reduce silica dissolution in the vicinity of the liquid phase; and (d) injecting the wet steam into the formation.
    Type: Grant
    Filed: February 3, 1989
    Date of Patent: April 3, 1990
    Assignee: Chevron Research Company
    Inventor: Marion G. Reed
  • Patent number: 4910006
    Abstract: A crystalline zeolite SSZ-26 is prepared using a hexamethyl [4.3.3.0] propellane-8,11-diammonium cation as a template. Also disclosed is a process for converting hydrocarbons with crystalline zeolite SSZ-26.
    Type: Grant
    Filed: March 23, 1988
    Date of Patent: March 20, 1990
    Assignee: Chevron Research Company
    Inventors: Stacey I. Zones, Donald S. Santilli, James N. Ziemer, Dennis L. Holtermann, Theresa A. Pecoraro, Robert A. Innes
  • Patent number: 4906575
    Abstract: The present invention is a phosphate compound for use in a bacterial nutrient medium. The medium is injected downhole in a petroleum formation along with a bacteria (or its spore) and provides the bacteria with growth nutrients. The nutrient solution contains a phosphate compound which: will not precipitate out of solution under ambient conditions; will chelate alkaline earth, rare earth, transition and heavy metal ions; and provide a nutrient source for the bacteria.
    Type: Grant
    Filed: March 6, 1987
    Date of Patent: March 6, 1990
    Assignee: Chevron Research Company
    Inventors: Richard S. Silver, Pamela M. Bunting
  • Patent number: 4903769
    Abstract: A method for inhibiting permeability damage of a hydrocarbon formation containing clay minerals in the vicinity of a well penetrating the formation. It comprises: injecting a wet steam that includes (a) an amount of ammonia in the vapor phase of the wet steam to produce a concentration of ammonium ions in the vapor phase condensate of the wet steam effective to inhibit permeability damage of the formation in the vicinity of the vapor phase, and (b) an amount of a bicarbonate salt of the alkali metals, or mixtures thereof, effective to raise the liquid phase pH of the wet steam to within the range of about 7.5 to about 10.5.
    Type: Grant
    Filed: December 2, 1988
    Date of Patent: February 27, 1990
    Assignee: Chevron Research Company
    Inventors: Liming Hsueh, Marion G. Reed
  • Patent number: 4904278
    Abstract: Disclosed are additives which are useful as dispersants in lubricating oils, gasolines, marine crankcase oils and hydraulic oils. In particular, disclosed are polyamino alkenyl or alkyl succinimides which contain carbamate functionalities.
    Type: Grant
    Filed: May 16, 1986
    Date of Patent: February 27, 1990
    Assignee: Chevron Research Company
    Inventors: Robert H. Wollenberg, Frank Plavac
  • Patent number: 4901923
    Abstract: A multiple dilution ratio aspirator sprayer adapted to be connected to a hose for mixing a liquid with pressurized water from the hose and providing a spray of the mixture comprises a container for housing the liquid to be mixed with the water; a mixing head having a nozzle at one end thereof and a garden hose attachment device at the other end thereof; a mixing chamber within the mixing head; a hose for communicating the liquid from the container to the mixing head; a disk having a plurality of apertures therein rotatably mounted in the mixing head to control flow from the container to the mixing chamber; a flow tube communicates liquid in the container to the inlet to mixing chamber through a selected aperture in the disk so that the liquid is diluted with pressurized water at a dilution ratio determined by the size of the aperture aligned with the tube and the mixing chamber; and a cleaning orifice is positioned circumferentially from the mixing chamber so that each of the plurality of apertures may be sel
    Type: Grant
    Filed: October 11, 1988
    Date of Patent: February 20, 1990
    Assignee: Chevron Research Company
    Inventors: Peter K. McRoskey, Paul M. Havlovitz
  • Patent number: 4902844
    Abstract: A crystalline zeolite SSZ-23 is prepared using an adamantane quaternary ammonium ion as a template.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: February 20, 1990
    Assignee: Chevron Research Company
    Inventors: Stacey I. Zones, R. A. Innes
  • Patent number: 4902666
    Abstract: This invention relates to the preparation of small spheroidal solid agglomerates. More particularly, the process produces strong solid spheroidal agglomerates containing alumina or a mixture of alumina and at least one other inorganic material, which process comprises:(a) mixing at high speed a portion of alumina or a mixture of alumina and at least one other inorganic material in the form of hydrophilic mircon-sized particles in a water-immiscible liquid thereby forming a dispersion;(b) gradually adding to the dispersion an aqueous acidic phase while continuing the high-speed mixing until substantially spherical micro-agglomerates form within the water-immiscible liquid;(c) subjecting the micro-agglomerates to agitation in a vessel having a hydrophobic inner surface at a speed low enough to achieve substantially uniformly sized spheroidal agglomerates;(d) drying the agglomerates to produce hardened spheroidal uniformly sized agglomerates; and(e) optionally further separating the agglomerates by size.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: February 20, 1990
    Assignee: Chevron Research Company
    Inventor: Andrew Rainis
  • Patent number: 4902961
    Abstract: A method and apparatus for determining the water content of crude oil in a pipeline is disclosed. The device consists of S-band tarnsmitting and receiving antennas, and X-band transmitting and receiving antennas. These are used to determine the complex dielectric constant of the fluid in a pipeline. Water salinity and an adjustment to the mixing formula are calculated using X-band and S-band sidewall links. The overall water content of the pipeline can then be determined by using as S-band main link that transmits a wave through a representative portion of the entire pipeline.
    Type: Grant
    Filed: April 8, 1987
    Date of Patent: February 20, 1990
    Assignee: Chevron Research Company
    Inventors: Bibhas R. De, Paul L. Donoho, David E. Revus, Russell E. Boyer
  • Patent number: 4900458
    Abstract: A corrosion inhibiting polyalkylenepolyamine composition comprising a mixture of(a) at least one C-alkyl-ethylene diamine, and(b) at least one di-(C-alkyl)-diethylenetriamine or at least one di-(C-alkyl)-piperazine or a mixture thereof;wherein each C-alkyl group on the ethylene diamine, diethylenetriamine and piperazine independently contains from 10 to 28 carbon atoms. Methods for preparing this composition are also disclosed, as well as methods for its use in inhibiting corrosion of corrodible metals.
    Type: Grant
    Filed: January 11, 1988
    Date of Patent: February 13, 1990
    Assignee: Chevron Research Company
    Inventors: Albert H. Schroeder, Ta Y. Ching, Shigeto Suzuki, Kiyoshi Katsumoto
  • Patent number: 4893684
    Abstract: A well bore annulus wiper plug is disclosed. The wiper plug has a central body and inner and outer elastomeric ribs. The ribs are generally in the shape of truncated cones. To operate the device, it is inserted in the annular space between well casing and a drill string. Fresh drilling mud is circulated downwardly through the annular space above the wiper plug. The wiper plug scrapes both the outside of the drill pipe and the inside of the casing free of a previous well fluid.
    Type: Grant
    Filed: April 5, 1989
    Date of Patent: January 16, 1990
    Assignee: Chevron Research Company
    Inventor: Robert L. Alexander
  • Patent number: 4892952
    Abstract: Compounds of the formula: ##STR1## wherein R is phenyl or phenyl substituted with 1 to 4 of the same or different substituents selected from fluoro, chloro, bromo, iodo, lower alkyl and trihalomethyl;R.sup.1 is lower alkyl;Y is lower alkenyl substituted with a 5- or 6-member heterocyclic ring containing 1 to 3 nitrogen atoms and the remainder of the ring atoms carbon atoms, or --CH.sub.2 W wherein W is fluoro, chloro, bromo, iodo, or a 5- to 6-member heterocyclic ring containing 1 to 3 nitrogen atoms and the remainder of the ring atoms carbon atoms; andX and Z are independently sulfur or oxygen; are effective fungicides.
    Type: Grant
    Filed: November 19, 1982
    Date of Patent: January 9, 1990
    Assignee: Chevron Research Company
    Inventor: David M. Spatz