Patents Assigned to Chevron Research Company
  • Transponder system including an oscillator/ripple counter controlling a fixed gray code logic network in circuit with a driver/gate circuit for generating "red-alert" end condition digital signals in a storage tank gauging system
    Patent number: 4171520
    Abstract: A "red-alert" end condition digital signal is generated by a transponder system of the present invention formed essentially of MSI's (Medium Scale Integrated Chips) including an oscillator/ripple counter controlling a fixed Gray code logic encoding network in circuit with a driver circuit. The aforementioned system both is initiated by and is in power dependent relationship with a MARK-SPACE interrogation signal and has special utility in digitally monitoring product "overflow" conditions in source/product storage tank networks associated with an oil refinery and/or a chemical complex.
    Type: Grant
    Filed: November 25, 1977
    Date of Patent: October 16, 1979
    Assignee: Chevron Research Company
    Inventor: John S. Adamson
  • Sulfur-reactive contact material having improved diffusion characteristics
    Patent number: 4171285
    Abstract: Sulfur-containing impurities are removed from a refined hydrocarbon feed by contact thereof with a porous sulfur-reactive agent having a pore volume of at least 0.15 cc per cc of which at least 5% is in pores having a diameter in the range 0.1 to 15 microns. The agent contains at least one sulfur-reactive material from the group copper, iron, zinc and compounds thereof.
    Type: Grant
    Filed: May 18, 1978
    Date of Patent: October 16, 1979
    Assignee: Chevron Research Company
    Inventor: Bernard F. Mulaskey
  • Nitrobenzene-accelerated lactam polymerization
    Patent number: 4171425
    Abstract: Processes for the anionic polymerization of lactam accelerated by the presence of nitrobenzene and/or certain derivatives thereof. The processes are especially applicable to the preparation of poly-2-pyrrolidone which can be molded into filaments, films, and shaped articles in general.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: October 16, 1979
    Assignee: Chevron Research Company
    Inventor: Henry Y. Lew
  • Petroleum distillate upgrading process
    Patent number: 4171257
    Abstract: A petroleum distillate feed is upgraded and a substantial C.sub.3 -C.sub.4 olefin product fraction produced by contacting the feed with H-ZSM-5 zeolite at (1) a temperature in the 500.degree.-800.degree. F. range, (2) a pressure below about 13 atmospheres gauge, and (3) an LHSV in the 0.1-15 V/V/Hr range, and fractionating the effluent product stream.
    Type: Grant
    Filed: October 23, 1978
    Date of Patent: October 16, 1979
    Assignee: Chevron Research Company
    Inventors: Dennis J. O'Rear, Jerome F. Mayer
  • Triarylmethylhalide-accelerated lactam polymerization
    Patent number: 4171426
    Abstract: Processes for the anionic polymerization of lactam accelerated by the presence of certain triarylmethyl halides. The processes are especially applicable to the preparation of poly-2-pyrrolidone which can be molded into filaments, films, and shaped articles in general.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: October 16, 1979
    Assignee: Chevron Research Company
    Inventor: Henry Y. Lew
  • Lubricating oil antioxidant additive composition
    Patent number: 4170560
    Abstract: A lubricating oil additive composition which imparts improved oxidation properties to crankcase lubricants comprises an antioxidant selected from aromatic or alkyl sulfides and polysulfides, sulfurized olefins, sulfurized carboxylic acid esters and sulfurized ester-olefins, and a hydroxy amine of the formula: ##STR1## WHEREIN A and A' are C.sub.2 -C.sub.10 alkylene, R is C.sub.1 -C.sub.30 alkyl, Y is H, C.sub.1 -C.sub.6 alkyl of --A--OH, y is 0, 1 or 2, and x is 1 or 2.Lubricating oil compositions containing this additive composition are also disclosed.
    Type: Grant
    Filed: March 27, 1978
    Date of Patent: October 9, 1979
    Assignee: Chevron Research Company
    Inventor: Warren Lowe
  • Hydrocracking process including upgrading of bottoms fraction of the product
    Patent number: 4170544
    Abstract: An improved hydrocarbon hydrocracking process is disclosed wherein residual nitrogen-containing and/or polycyclic hydrocarbon impurities are extracted from bottoms of the resulting hydrocrackate by contacting the bottoms under liquid-liquid extracting conditions with a furfural solution of ferric chloride.
    Type: Grant
    Filed: June 12, 1978
    Date of Patent: October 9, 1979
    Assignee: Chevron Research Company
    Inventor: Stephen J. Miller
  • Crown ether and N-acyl pyrrolidone activated copolymerization of 2-pyrrolidone and caprolactam
    Patent number: 4169936
    Abstract: Processes for copolymerizing 2-pyrrolidone and caprolactam to yield a copolymer which can be formed into useful shaped articles, e.g., filaments. The processes are characterized by the use of both a crown ether and an N-acyl pyrrolidone activator and the use of a limited copolymerization temperature range.
    Type: Grant
    Filed: March 31, 1978
    Date of Patent: October 2, 1979
    Assignee: Chevron Research Company
    Inventor: Robert Bacskai
  • Process for comminuting and reducing the sulfur and ash content of coal
    Patent number: 4169710
    Abstract: Coal may be effectively comminuted and the ash and sulfur content thereof reduced by contacting the coal with a hydrogen halide such as HF.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: October 2, 1979
    Assignee: Chevron Research Company
    Inventor: Harbo P. Jensen
  • Denitrification by furfural-ferric chloride extraction of coker oil
    Patent number: 4169781
    Abstract: A process is disclosed for denitrification of a hydrogenated oil, which is particularly applicable to coal-derived oils. The oil is first coked to yield a solid coke product and a coker oil having a reduced nitrogenous compound content. The coker oil nitrogen compounds are then selectively removed from the oil by liquid-liquid extraction using a solution of ferric chloride in furfural as the extracting medium. The extraction is carried out under moderate conditions of temperature and pressure.
    Type: Grant
    Filed: June 2, 1978
    Date of Patent: October 2, 1979
    Assignee: Chevron Research Company
    Inventor: Stephen J. Miller
  • Alcohol production
    Patent number: 4169961
    Abstract: An alkenediol is produced from an alkenol by contacting the alkenol with formaldehyde at a pH maintained between about 4 and 7. Preferably this pH range is maintained by adding a buffering agent composed of a weak acid and the salt of a weak acid. Particularly advantageous buffering agents are the lower organic polycarboxylic acids with disodium or dipotassium hydrogen phosphate and sodium or potassium dihydrogen phosphate with disodium or dipotassium hydrogen phosphate.
    Type: Grant
    Filed: July 11, 1977
    Date of Patent: October 2, 1979
    Assignee: Chevron Research Company
    Inventors: Robert G. Wall, John B. Wilkes, Shigeto Suzuki
  • Staged process for the production of middle distillate from a heavy distillate
    Patent number: 4169040
    Abstract: Middle distillate oil is produced with a minimum production of lighter hydrocarbons by (1) contacting hydrogen gas and a heavy distillate oil containing nitrogenous hydrocarbons with a catalyst in a first reaction zone under selected conditions, and (2) contacting hydrogen gas and at least a portion of the resulting effluent from the first zone with a catalyst in a second reaction zone under selected conditions. In each zone the catalyst is a composite of an amorphous silica-alumina carrier and a hydrogenation component wherein the silica and hydrogenation component are highly dispersed.
    Type: Grant
    Filed: April 26, 1978
    Date of Patent: September 25, 1979
    Assignee: Chevron Research Company
    Inventors: Donald A. Bea, Joseph Jaffe
  • Diesel fuel containing polyalkylene amine and Mannich base
    Patent number: 4166726
    Abstract: Disclosed is a fuel additive and fuel composition. The additive comprises a mixture of a polyalkylene amine and the reaction product of an alkylphenol, an aldehyde and an amine. The additive provides surprising stability in preventing thermal degradation of fuels, particularly fuels for compression ignition engines.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: September 4, 1979
    Assignee: Chevron Research Company
    Inventor: Oliver L. Harle
  • Sulfur oxides control in catalytic cracking
    Patent number: 4166787
    Abstract: The amount of sulfur oxides in flue gas evolved in a catalyst regenerator in a catalytic cracking system is lowered by incorporating into the cracking catalyst, before using the catalyst in the cracking system, finely divided, high surface area alumina which has been calcined at 700.degree.-1600.degree.0 F. before incorporation into the catalyst. Sulfur oxides react with the calcined alumina in the regenerator to form a sulfur-containing solid. The sulfur-containing solid reacts with hydrocarbon to form fluid sulfur compounds in the FCC reactor, and the sulfur compounds exit the reactor mixed with the cracked hydrocarbons.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: September 4, 1979
    Assignee: Chevron Research Company
    Inventors: William A. Blanton, Jr., Joseph Jaffe
  • Process for preparing 1,4-dioxan-2-ones
    Patent number: 4166821
    Abstract: 1,4-Dioxan-2-ones are prepared by contacting carbon monoxide with formaldehyde, a 1,2-glycol, and a catalytic amount of hydrogen fluoride. The products of this reaction are readily converted into diglycolic acids by heating with aqueous caustic in the presence of a nickel catalyst.
    Type: Grant
    Filed: June 29, 1978
    Date of Patent: September 4, 1979
    Assignee: Chevron Research Company
    Inventor: Shigeto Suzuki
  • Lowering sulfur oxide output from catalyst regeneration
    Patent number: 4165275
    Abstract: Sulfur oxides in flue gas formed during cracking catalyst regeneration are reacted with a zeolitic crystalline aluminosilicate containing sodium cations in the catalyst regenerator to form a sulfur-containing solid, and the sulfur component is removed from the crystalline aluminosilicate in the cracking reactor by contacting the sulfur-containing solid with the hydrocarbon feed.
    Type: Grant
    Filed: December 16, 1977
    Date of Patent: August 21, 1979
    Assignee: Chevron Research Company
    Inventors: William A. Blanton, Jr., Donald W. Blakely
  • Grease thickening agent
    Patent number: 4165329
    Abstract: An improved thickening agent is disclosed comprising a polyurea metal salt wherein the polyurea portion of the molecule is prepared by reacting a diisocyanate, a diamine with a monoisocyanate or monoamine. The metal salt is prepared by reacting the polyurea compound with an acid group, such as a carboxylic or a sulfonic acid group, and neutralizing the terminal acid group with a basic metal compound.
    Type: Grant
    Filed: August 20, 1976
    Date of Patent: August 21, 1979
    Assignee: Chevron Research Company
    Inventors: John L. Dreher, Garth M. Stanton
  • Synthesis of acrylic acids and esters
    Patent number: 4165438
    Abstract: Acrylic acids and esters are produced by reacting a lower alkanoic acid or lower alkyl ester thereof with formaldehyde in the presence of a vanadium orthophosphate catalyst having an intrinsic surface area of from about 10 m.sup.2 /g to about 50 m.sup.2 /g.
    Type: Grant
    Filed: October 20, 1976
    Date of Patent: August 21, 1979
    Assignee: Chevron Research Company
    Inventor: Ronald A. Schneider
  • Alkylation of aniline with a lactone in the presence of water
    Patent number: 4165322
    Abstract: A process for producing a lactone-substituted aniline wherein an alpha-halo-gamma-butyrolactone is reacted with an aniline in the presence of water at a temperature between 80.degree. and 160.degree. C. Thus, 3-(N-2,6-dimethylphenylamino)-gamma-butyrolactone is prepared by reacting an alpha-halo-gamma-butyrolactone with 2,6-dimethylaniline in the presence of water and an inert organic solvent at a temperature between 80.degree. and 160.degree. C. This process is advantageously combined with a subsequent acylation step to provide a continuous means for making materials such as 3-(N-chloroacetyl-N-2,6-dimethylphenylamino)-gamma-butyrolactone.
    Type: Grant
    Filed: November 1, 1977
    Date of Patent: August 21, 1979
    Assignee: Chevron Research Company
    Inventor: Richard N. Reynolds, Jr.
  • Plasticized sulfur composition
    Patent number: 4164428
    Abstract: A plasticized sulfur composition having improved chemical resistance, comprising at least 50% by weight sulfur, a sulfur plasticizer, a mineral suspending agent, and an organosilane stabilizing agent.
    Type: Grant
    Filed: March 2, 1978
    Date of Patent: August 14, 1979
    Assignee: Chevron Research Company
    Inventor: Milutin Simic