Patents Assigned to Chevron Chemical Company
  • Patent number: 5780398
    Abstract: An additive useful in a marine lubricating oil is produced by reacting at elevated temperatures in the presence of at least one light hydrocarbon solvent and promoter: an alkyl oxy aromatic sulfonate; an alkaline earth metal base; carbon dioxide; and an acid component, such as carboxylic acid, an acid anhydride, an acid choride, or ester thereof. If the alkyl oxy aromatic sulfonate is in the acidic form, then the acid component is in the acidic form. If the alkyl oxy aromatic sulfonate is in the neutralized form, then the acid component is in the neutralized form. If the alkyl oxy aromatic sulfonate is in the overbased form, then the acid component is either in the acidic form or in the neutralized form.
    Type: Grant
    Filed: July 24, 1997
    Date of Patent: July 14, 1998
    Assignee: Chevron Chemical Company
    Inventors: William F. King, Richard J. Nelson, Robert H. Wollenberg, Steven G. Lockett
  • Patent number: 5776361
    Abstract: An oxygen scavenging composition or system is provided comprising at least one polyterpene and at least one catalyst effective in catalyzing an oxygen scavenging reaction. A film, a multi-phase composition, a multi-layer composition, an article comprising the oxygen scavenging composition, a method for preparing the oxygen scavenging composition, and a method for scavenging oxygen are also provided.
    Type: Grant
    Filed: August 13, 1996
    Date of Patent: July 7, 1998
    Assignee: Chevron Chemical Company
    Inventors: Kiyoshi Katsumoto, Ta Yen Ching
  • Patent number: 5759966
    Abstract: Process for preparing high overbased metal sulfurized alkylphenates, wherein a majority of the alkalinity is provided by at least a stoichiometric excess of metal. The process is characterized by a sulfurization reaction using a promoter, followed by overbasing with carbon dioxide, a polyamine, and additional metal base in the presence of an alkylene glycol under reactive conditions at temperatures in the range of about from 150.degree. C. to 190.degree. C. The process affords a metal sulfurized phenate product which is substantially insensitive to overcarbonation, which exhibits low corrosive wear, and which exhibits high rates of acid neutralization. These compositions are useful in the formulation of marine cylinder lubricants.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: June 2, 1998
    Assignee: Chevron Chemical Company
    Inventor: Curtis B. Campbell
  • Patent number: 5755832
    Abstract: An additive concentrate has at least one nitrogen-containing deposit control additive, a solvent, and at least one tagging material. The tagging material has a number average molecular weight of at least 15,000 and a weight average to number average molecular weight ratio of less than 1.5. The tagging material has a molecular weight distribution that is sufficiently different from the molecular weight distribution of the deposit control additive so as to be distinguishable from the deposit control additive. The amount of each tagging material is less than 1 weight % of the additive concentrate.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: May 26, 1998
    Assignee: Chevron Chemical Company
    Inventors: Jeffrey J. Toman, Wilton R. Biggs
  • Patent number: 5755835
    Abstract: A fuel additive composition comprising:(a) A fuel-soluble aliphatic amine selected from the group consisting of (1) a straight or branched chain hydrocarbyl-substituted amine, (2) a hydroxyalkyl substituted amine, and (3) a straight or branched chain hydrocarbyl-substituted succinimide; 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: December 28, 1992
    Date of Patent: May 26, 1998
    Assignee: Chevron Chemical Company
    Inventor: Richard E. Cherpeck
  • Patent number: 5752991
    Abstract: Very long chain alkylphenyl polyoxyalkylene amines having the formula: ##STR1## wherein R.sub.1 is an alkyl group having at least 40 carbon atoms; R.sub.2 and R.sub.3 are each independently hydrogen or lower alkyl having about 1 to about 2 carbon atoms and each R.sub.2 and R.sub.3 is independently selected in each --O--CHR.sub.2 --CHR.sub.3 -- unit;A is an amine moiety derived from ammonia, a primary alkyl monoamine having about 1 to 20 carbon atoms, a secondary dialkyl monoamine having about 1 to 20 carbon atoms in each alkyl group, or a polyamine having about 2 to about 12 amine nitrogen atoms and about 2 to about 40 carbon atoms;x is an integer from about 1 to about 2; and y is an integer from about 5 to about 50.The very long chain alkylphenyl polyoxyalkylene amines of the present invention are useful as fuel additives for the prevention and control of engine deposits.
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: May 19, 1998
    Assignee: Chevron Chemical Company
    Inventor: Frank Plavac
  • Patent number: 5753597
    Abstract: A polysuccinimide composition is prepared by reacting a mixture of a copolymer of a first unsaturated acidic reagent and a 1,1-disubstituted olefin; a copolymer of a second unsaturated acidic reagent and a 1-olefin, 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 two unsaturated acidic reagents can be the same or different. The mixture contains from 0.1 to 1.5 equivalents of polyamine per equivalent of acidic groups of the first and second copolymers.
    Type: Grant
    Filed: August 20, 1996
    Date of Patent: May 19, 1998
    Assignee: Chevron Chemical Company
    Inventors: James J. Harrison, William R. Ruhe, Jr.
  • Patent number: 5749929
    Abstract: A fuel additive composition comprising: (a) an aromatic ester compound of the formula: ##STR1## or a fuel soluble salt thereof, wherein R is hydroxy, nitro or --(CH.sub.2).sub.x --NR.sub.5 R.sub.6, wherein R.sub.5 and R.sub.6 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms and x is 0 or 1;R.sub.1, is hydrogen, hydroxy, nitro or --NR.sub.7 R.sub.8, wherein R.sub.7 and R.sub.8 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms;R.sub.2 and R.sub.3 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms; andR.sub.4 is a polyalkyl group having an average molecular weight in the range of about 450 to 5,000; and(b) 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 fuel range.The fuel additive compositions of this invention are useful as fuel additives for the prevention and control of engine deposits.
    Type: Grant
    Filed: April 7, 1997
    Date of Patent: May 12, 1998
    Assignee: Chevron Chemical Company
    Inventors: Richard E. Cherpeck, Jack E. Morris, Majid R. Ahmadi
  • Patent number: 5744246
    Abstract: An oxygen scavenging ribbon comprises a heat sealable resin and an oxygen scavenging material. This ribbon, upon oxidation of the oxygen scavenging material, does not release significant amounts of byproducts which are odorous and/or non-GRAS food additives. This ribbon can be in a number of forms including a multilayer casting or blown film tube. This ribbon provides a great deal of flexibility in the scavenging of oxygen within packaging environments.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: April 28, 1998
    Assignee: Chevron Chemical Company
    Inventor: Ta Yen Ching
  • Patent number: 5741759
    Abstract: The present invention relates to synthetic hydrocarbons produced by skeletal isomerization, and the isomerization process. The products are especially useful as the continuous phase of a drilling fluid, for example when prepared from C.sub.14 to C.sub.18 linear alpha-olefins via isomerization or hydroisomerization, and as lube oils. The present invention also relates to a process for producing synthetic hydrocarbons by skeletally isomerizing C.sub.12+ olefins over a catalyst comprising an intermediate pore size molecular sieve, with or without Group VIII metals under skeletal isomerization conditions which result in little, preferably in substantially no, olefin cracking or oligomerization.
    Type: Grant
    Filed: September 19, 1996
    Date of Patent: April 21, 1998
    Assignee: Chevron Chemical Company
    Inventors: Jeffrey C. Gee, Roger C. Williamson, Christope J. Lawrie, Stephen J. Miller
  • Patent number: 5736616
    Abstract: Disclosed is a process for esterifying and/or transesterifying a polymer having a polyethylenic backbone and pendant acid and/or ester moieties comprising contacting a melt of the polymer with a transesterifying compound so that the polymer undergoes esterification and/or transesterification but not alcoholysis. The esterified or transesterified polymer also has pendant ester moieties which differ in kind and/or number from the unreacted polymer. In one embodiment, the process also comprises adding an amount of a transition metal salt that is effective to promote oxygen scavenging. Also in a further embodiment, the process comprises irradiating the transesterified polymer with actinic radiation to reduce the induction period before oxygen scavenging commences. Also disclosed are compositions comprising a component which comprises an ethylenic or polyethylenic backbone and a pendant or terminal moiety comprising a benzylic, allylic, or ether-containing radical.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: April 7, 1998
    Assignee: Chevron Chemical Company
    Inventors: Ta Yen Ching, Kiyoshi Katsumoto, Steven P. Current, Leslie P. Theard
  • Patent number: 5728656
    Abstract: A lubricating oil composition, having an ash content of less than 1.5 weight percent, has a base oil of lubricating viscosity, and a zinc dialkyldithiophosphate having a zinc to phosphorus weight ratio in the range of from 0.95:1 to 1.04:1.
    Type: Grant
    Filed: March 20, 1997
    Date of Patent: March 17, 1998
    Assignee: Chevron Chemical Company
    Inventors: Elaine S. Yamaguchi, William R. Ruhe, Jr.
  • Patent number: 5728657
    Abstract: An overbased phenate stearate is produced by overbasing a mixture that comprises sulfurized phenate, metal stearate (such as calcium stearate), at least one solvent, calcium hydroxide, and water, by contacting the mixture with carbon dioxide in the presence of an alkyl polyhydric alcohol, such as ethylene glycol. The level of agitation is maintained at a level sufficiently high so that all solids are suspended over the length of the overbasing step. The polyhydric alcohol to water ratio is maintained sufficiently high so that the ratio is at least 4:1 at the end of the overbasing step. The overbased mixture is stripped to produce an overbased phenate stearate having less than 0.10 vol. % fine sediments.
    Type: Grant
    Filed: June 5, 1997
    Date of Patent: March 17, 1998
    Assignee: Chevron Chemical Company
    Inventors: Curt B. Campbell, Christopher S. Fridia
  • Patent number: 5728182
    Abstract: A polyalkyl ester of a substituted polyphenylether having the formula: ##STR1## wherein A is amino, aminomethyl, cyano, nitro, N-alkylamino or N-alkylaminomethyl wherein the alkyl group contains about 1 to about 6 carbon atoms, or N,N-dialkylamino or N,N-dialkylaminomethyl wherein each alkyl group independently contains about 1 to about 6 carbon atoms; R.sub.1 a polyalkyl group having an average molecular weight in the range of about 450 to about 5000; and x is an integer from about 1 to about 10 and y is an integer from 0 to about 10. The polyalkyl esters of the substituted polyphenyl ethers of the present invention are useful as fuel additives for the prevention and control of engine deposits.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: March 17, 1998
    Assignee: Chevron Chemical Company
    Inventor: Richard E. Cherpeck
  • Patent number: 5723707
    Abstract: Disclosed are methods for dehydrogenation in reactor systems of improved resistance to carburization under dehydrogenation conditions.
    Type: Grant
    Filed: December 12, 1994
    Date of Patent: March 3, 1998
    Assignee: Chevron Chemical Company
    Inventors: John V. Heyse, Paul G. Johnson, Bernard F. Mulaskey
  • Patent number: 5716912
    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: April 9, 1996
    Date of Patent: February 10, 1998
    Assignee: Chevron Chemical Company
    Inventors: James J. Harrison, William R. Ruhe, Jr.
  • Patent number: 5716515
    Abstract: A high temperature treatment process is disclosed for increasing conversion and reducing the fouling rate of reforming catalysts. The process comprises reducing the catalyst in a reducing gas atmosphere at a temperature below 1025.degree. F. and then treating the reduced catalyst at a temperature of from 1025.degree. F. to 1275.degree. F. in an inert gas atmosphere.
    Type: Grant
    Filed: May 25, 1995
    Date of Patent: February 10, 1998
    Assignee: Chevron Chemical Company
    Inventor: Robert A. Innes
  • Patent number: 5713966
    Abstract: Polyalkyl hydroxyaromatic esters having the formula: ##STR1## or a fuel-soluble salt thereof; where R.sub.1 and R.sub.2 are independently hydrogen, hydroxy, lower alkyl having 1 to 6 carbon atoms, or lower alkoxy having 1 to 6 carbon atoms; R.sub.3 is a polyalkyl group having a weight average molecular weight in the range of about 450 to 5,000; and x is an integer from 0 to 10.The polyalkyl hydroxyaromatic esters of formula I are useful as fuel additives for the prevention and control of engine deposits.
    Type: Grant
    Filed: April 16, 1996
    Date of Patent: February 3, 1998
    Assignee: Chevron Chemical Company
    Inventor: Richard E. Cherpeck
  • Patent number: 5709719
    Abstract: A poly(oxyalkylene) ester of a substituted polyphenylether having the formula: ##STR1## wherein A is amino, aminomethyl, cyano, nitro, N-alkylamino or N-alkylaminomethyl wherein the alkyl group contains about 1 to about 6 carbon atoms, or N,N-dialkylamino or N,N-dialkylaminomethyl wherein each alkyl group independently contains about 1 to about 6 carbon atoms; R.sub.1 and R.sub.2 are independently hydrogen or lower alkyl having about 1 to about 6 carbon atoms and each R.sub.1 and R.sub.3 is independently selected in each --O--CHR.sub.1 -CHR.sub.2 - unit; R.sub.3 is hydrogen, alkyl having about 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; x is an integer from about 1 to about 10, y is an integer from 0 to about 10; and z is an integer from about 1 to about 100.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: January 20, 1998
    Assignee: Chevron Chemical Company
    Inventor: Richard E. Cherpeck
  • Patent number: 5709720
    Abstract: Aromatic ethers of polyalkylphenoxyalkanols having the formula: ##STR1## or a fuel soluble salt thereof, wherein R is hydroxy, nitro or --(CH.sub.2).sub.x -NR.sub.5 R.sub.6, wherein R.sub.5 and R.sub.6 are independently hydrogen or lower alkyl having 1 to carbon atoms, and x is 0 or 1;R.sub.1 is hydrogen, hydroxy, nitro or --NR.sub.7 R.sub.8, wherein R.sub.7 and R.sub.8 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms;R.sub.2 and R.sub.3 are independently hydrogen or lower alkyl having 1 to 6 carbon atoms; andR.sub.4 is a polyalkyl group having an average molecular weight in the range of about 450 to 5,000.The compounds of formula I are useful as fuel additives for the prevention and control of engine deposits.
    Type: Grant
    Filed: November 7, 1996
    Date of Patent: January 20, 1998
    Assignee: Chevron Chemical Company
    Inventor: Richard E. Cherpeck