Patents Assigned to Chevron Chemical Company
  • Patent number: 6673736
    Abstract: An improved chromate catalyst on a highly porous silica support having high surface area and total pore volume, a method of using same to produce high performance polyethylene products, and the high performance polyethylene products, such as polyethylene pipe, produced thereby.
    Type: Grant
    Filed: February 11, 2000
    Date of Patent: January 6, 2004
    Assignee: Chevron Chemical Company LLC
    Inventors: Gene E. Kellum, Pamela L. Maeger
  • Publication number: 20030152727
    Abstract: Oxygen scavenging materials incorporated into or attached to a package such as a gable-top or rectangular carton, used to package foods, beverages or other oxygen sensitive materials, and thereby increase shelf-life by decreasing oxygen in the headspace of the package, and decreasing oxidation of the packaged product.
    Type: Application
    Filed: February 10, 2003
    Publication date: August 14, 2003
    Applicant: Chevron Chemical Company LLC
    Inventors: Gary D. Jerdee, James P. Leonard, Ta Yen Ching, Joseph L. Goodrich, Brad D. Rodgers, Richard P. Schmidt
  • Patent number: 6569506
    Abstract: Oxygen scavenging materials incorporated into or attached to a package such as a gable-top or rectangular carton, used to package foods, beverages or other oxygen sensitive materials, and thereby increase shelf-life by decreasing oxygen in the headspace of the package, and decreasing oxidation of the packaged product.
    Type: Grant
    Filed: August 18, 1999
    Date of Patent: May 27, 2003
    Assignee: Chevron Chemical Company LLC
    Inventors: Gary D. Jerdee, James P. Leonard, Ta Yen Ching, Joseph L. Goodrich, Brad D. Rodgers, Richard P. Schmidt
  • Publication number: 20020193240
    Abstract: A method for preparing a catalyst is herein disclosed which comprises the steps of impregnating a carrier with active components, particularly a platinum-containing compound and one or more halogen-containing compounds, drying the impregnated carrier, and then calcining the same, said drying treatment being carried out while the impregnated carrier is in a drifting condition. According to the above method, an activity of the catalyst can be improved, and a cracking selectivity can be reduced.
    Type: Application
    Filed: February 19, 2002
    Publication date: December 19, 2002
    Applicant: Chevron Chemical Company, LLC
    Inventor: Tetsuya Fukunaga
  • Patent number: 6451920
    Abstract: A process is provided for preparing a mixture of (1) a copolymer of a polyalkene and an unsaturated acidic reagent and (2) a polyalkenyl derivative of an unsaturated acidic reagent, said process comprising (a) copolymerizing (1) a polyalkene containing alkylvinylidene isomer and non-alkylvinylidene isomers and (2) an unsaturated acidic reagent under polymerization conditions in the presence of a free radical initiator; and (b) reacting the product of step (a) with an unsaturated acidic reagent at elevated temperature in the presence of a strong acid. The product of the process can be used to make polysuccinimides that are useful in lubricating oil compositions.
    Type: Grant
    Filed: November 9, 1999
    Date of Patent: September 17, 2002
    Assignee: Chevron Chemical Company LLC
    Inventors: James J. Harrison, William R. Ruhe, Jr.
  • Publication number: 20020128532
    Abstract: A process for preparing very high viscosity polyalphaolefins using an acidic ionic liquid oligomerization catalyst in the absence of an organic diluent and the products formed thereby.
    Type: Application
    Filed: February 19, 2002
    Publication date: September 12, 2002
    Applicant: Chevron Chemical Company LLC
    Inventors: Kenneth D. Hope, Michael S. Driver, Thomas V. Harris
  • Patent number: 6410491
    Abstract: Provided is a polyalkenyl sulfonic acid composition comprising a mixture of polyalkenyl sulfonic acids derived from a mixture of polyalkenes comprising greater than 20 mole percent alkyl vinylidene and 1,1-dialkyl isomers, and a method for making the composition. Also provided are low and high overbased sulfonates made from the mixture of polyalkenyl sulfonic acids, and lubricating oils containing the sulfonates.
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: June 25, 2002
    Assignee: Chevron Chemical Company LLC
    Inventors: James J. Harrison, Curtis B. Campbell
  • Patent number: 6395948
    Abstract: A process for preparing very high viscosity polyalphaolefins using an acidic ionic liquid oligomerization catalyst in the absence of an organic diluent and the products formed thereby.
    Type: Grant
    Filed: May 31, 2000
    Date of Patent: May 28, 2002
    Assignee: Chevron Chemical Company LLC
    Inventors: Kenneth D. Hope, Michael S. Driver, Thomas V. Harris
  • Patent number: 6358892
    Abstract: A succinimide composition is prepared by reacting a mixture of an alkenyl or alkylsuccinic acid derivative, an unsaturated acidic reagent copolymer, and a polyamine under reactive conditions; then treating the reaction product with either a cyclic carbonate or a linear mono- or polycarbonate or boron compound under reactive conditions. The alkenyl or alkyl substituent of the alkenyl or alkylsuccinic acid derivative has a Mn of from 1800 to 3000. The unsaturated acidic reagent copolymer has a Mn of from 2000 to 4800, and is a copolymer of an unsaturated acidic reagent and an olefin having an average of from 14 to 30 carbon atoms. The polyamine has at least three nitrogen atoms and 4 to 20 carbon atoms. The mixture contains from 1.5 to 10 equivalents of the alkenyl or alkylsuccinic acid derivative per equivalent of unsaturated acidic reagent copolymer and from 0.4 to 1.0 moles of polyamine per equivalent of alkenyl or alkylsuccinic acid derivative plus unsaturated acidic reagent copolymer.
    Type: Grant
    Filed: January 27, 1998
    Date of Patent: March 19, 2002
    Assignee: Chevron Chemical Company
    Inventors: James J. Harrison, William R. Ruhe, Jr.
  • Patent number: 6352566
    Abstract: Ethers of polyalkyl or polyalkenyl N-hydroxyalkyl succinimides having the formula: or a fuel soluble salt thereof; wherein R is a polyalkyl or polyalkenyl group having an average molecular weight in the range of about 450 to about 5,000; n is an integer from 2 to 5; and Z is a moiety selected from the group consisting of  wherein R1 is a hydroxy, nitro, cyano or —(CH2)x—NR3R4, wherein R3 and R4 are independently hydrogen or lower alkyl of 1 to 6 carbon atoms and x is 0 or 1; and R2 is hydrogen, hydroxy, nitro, cyano or —(CH2)y—NR5R6, wherein R5 and R6 are independently hydrogen or lower alkyl of 1 to 6 carbon atoms and y is 0 or 1. The compounds of formula I are useful as fuel additives for the prevention and control of engine deposits.
    Type: Grant
    Filed: September 1, 2000
    Date of Patent: March 5, 2002
    Assignee: Chevron Chemical Company LLC
    Inventor: Richard E. Cherpeck
  • Patent number: 6333087
    Abstract: Oxygen scavenging materials incorporated into or attached to a package such as a gable-top or rectangular carton, used to package foods, beverages or other oxygen sensitive materials, and thereby increase shelf-life by decreasing oxygen in the headspace of the package, and decreasing oxidation of the packaged product.
    Type: Grant
    Filed: August 27, 1998
    Date of Patent: December 25, 2001
    Assignee: Chevron Chemical Company LLC
    Inventors: Gary D. Jerdee, James P. Leonard, Ta Yen Ching, Joseph L. Goodrich, Brad D. Rodgers, Richard P. Schmidt
  • Patent number: 6294506
    Abstract: A lubricating oil composition has a major amount of an oil of lubricating viscosity, a minor amount of a carbonated sulfurized metal alkyl phenate and, a minor amount of a carbonated metal alkyl aryl sulfonate. The total base equivalents donated by the phenate is more than 85% of the total base equivalents donated by the phenate and sulfonate. The composition also has alkenyl or alkyl succinimide additives that are the reaction product of a high molecular weight alkenyl- or alkyl-substituted succinic anhydride and a polyalkylene polyamine having an average of greater than four nitrogen atoms per mole, wherein the reaction product is post-treated with a cyclic carbonate.
    Type: Grant
    Filed: July 15, 1994
    Date of Patent: September 25, 2001
    Assignee: Chevron Chemical Company
    Inventors: Terry V. Friesen, James J. Harrison, William R. Ruhe, Jr.
  • Patent number: 6291733
    Abstract: A method of dimerizing alpha-olefins to mostly linear internal olefin dimers using as a catalyst a transition metal complex with an activating co-catalyst.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: September 18, 2001
    Assignee: Chevron Chemical Company LLC
    Inventors: Brooke L. Small, Eduardo J. Baralt, A. J. Marcucci
  • Patent number: 6291408
    Abstract: Dispersant detergent additives for lubricating oils prepared by neutralization, carboxylation, sulfurization-overalkalinization, carbonation, distillation, filtering and degassing from alkyl phenols containing 35-85% by weight of linear alkyl substituents. The process does not require, during the neutralizing phase, the presence of a third solvent, which, by forming an azeotropic mixture with water promote the elimination of water arising from the neutralizing reaction. The additives of the invention have improved stability to hydrolysis and improved dispersion properties, improved compatibility and improved foaming properties.
    Type: Grant
    Filed: July 21, 1999
    Date of Patent: September 18, 2001
    Assignee: Chevron Chemical Company LLC
    Inventors: Jean-Louis Le Coent, Jacques Cazin, Thierry Triconnet, William W. Willis, Jr.
  • Patent number: 6281404
    Abstract: A process for the double bond isomerization of olefinic feed compounds is provided comprising contacting the olefinic feed compounds and a catalyst under reaction conditions sufficient to produce double bond isomerization, wherein the catalyst is an aluminophosphate-containing molecular sieve with pores having a diameter in the range of about 3.8 Å to about 5 Å. The process provides high conversion of normal alpha-olefins and high selectivity for linear internal olefins.
    Type: Grant
    Filed: February 18, 2000
    Date of Patent: August 28, 2001
    Assignee: Chevron Chemical Company LLC
    Inventor: Stephen J. Miller
  • Patent number: 6274777
    Abstract: A method for removing boron from a boron trifluoride-catalyzed polyalkyl hydroxyaromatic reaction product which comprises: (a) diluting the polyalkyl hydroxyaromatic reaction product with an inert solvent to give a polyalkyl hydroxyaromatic reaction product concentration in the range of about 40 to about 80 weight percent; (b) filtering the diluted polyalkyl hydroxyaromatic reaction product in the presence of a filter aid in combination with (1) magnesium silicate, (2) water or (3) a mixture of magnesium silicate and water; wherein the water is present during filtration at a concentration of about 100 to 1,500 ppm, based on the diluted polyalkyl hydroxyaromatic reaction product; with the proviso that when water is used in the absence of magnesium silicate, the filter aid is diatomaceous earth; and (c) recovering a filtrate containing the diluted polyalkyl hydroxyaromatic reaction product having less than about 10 ppm of boron present.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: August 14, 2001
    Assignees: Chevron Chemical Company LLC, Chevron Chemical S.A.
    Inventors: James A. Gray, Thierry Triconnet
  • Patent number: 6269881
    Abstract: An oil recovery process is disclosed which uses a particular class of alkylaryl sulfonate surfactants. The surfactants are derived from an alpha-olefin stream having a broad distribution of even carbon numbers ranging from 12 to 58. The olefin stream is reacted with aromatic feedstock, such as benzene, toluene, xylene, or a mixture thereof to form alkylates, and then reacted with SO3 to form sulfonic acids. The resulting surfactant has high solubilization and ultra-low interfacial tension with crude oils, especially waxy crude oil, having a broad distribution of carbon numbers.
    Type: Grant
    Filed: December 17, 1999
    Date of Patent: August 7, 2001
    Assignees: Chevron U.S.A. Inc, Chevron Chemical Company LLC
    Inventors: Shang Chou, Curtis B. Campbell
  • Patent number: 6262001
    Abstract: An unsulfurized, alkali metal-free, detergent-dispersant composition having from 40% to 60% alkylphenol, from 10% to 40% alkaline earth alkylphenate, and from 20% to 40% alkaline earth single aromatic-ring alkylsalicylate. This composition may have an alkaline earth double aromatic-ring alkylsalicylate as long as the mole ratio of single-ring alkylsalicylate to double aromatic-ring alkylsalicylate is at least 8:1. This composition may be produced by the three-step process involving neutralization of alkylphenols, carboxylation of the resulting alkylphenate, and filtration of the product of the carboxylation step.
    Type: Grant
    Filed: October 26, 2000
    Date of Patent: July 17, 2001
    Assignee: Chevron Chemical Company LLC
    Inventors: Jean-Louis Marie Le Coent, Jacques Cazin, Pierre Tequi
  • Patent number: 6258133
    Abstract: A poly(oxyalkylene)pyridyl or piperidyl ether having the formula: wherein A is a nitrogen-containing ring selected from the group consisting of 3-pyridyl, 4-pyridyl, 3-piperidyl and 4-piperidyl; R1 and R2 are independently hydrogen or lower alkyl and each R1 and R2 is independently selected in each —O—CHR1—CHR2— unit; R3 is hydrogen, alkyl having 1 to about 100 carbon atoms, phenyl, aralkyl having about 7 to about 100 carbon atoms or alkaryl having about 7 to about 100 carbon atoms; n is an integer from about 5 to about 100; and x is an integer from 0 to 4. The poly(oxyalkylene)pyridyl and piperidyl ethers of the present invention are useful as fuel additives for the prevention and control of engine deposits.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: July 10, 2001
    Assignee: Chevron Chemical Company LLC
    Inventor: Richard E. Cherpeck
  • Patent number: 6235688
    Abstract: Non-thixotropic, sodium-free lubricant additive having from 10% to 50% of a liquid organic diluent and from 30% to 90% of a substituted hydrocarbaryl metal salt. At least 30 mole percent of the metal in the metal salt is lithium, and the salt is essentially free of sodium. The BN of the non-thixotropic lubricant additive attributable to the lithium is less than 150. This additive is useful for decreasing black sludge deposits and piston deposits.
    Type: Grant
    Filed: September 24, 1997
    Date of Patent: May 22, 2001
    Assignee: Chevron Chemical Company LLC
    Inventors: Vernon R. Small, Jean-Louis Le Coent, Gerrit J. Polhaar, Ita Suharti Suwandi, William Woodford Willis, Jr.