Patents Represented by Attorney, Agent or Law Firm C. J. Caroli
  • Patent number: 4340757
    Abstract: A process for the preparation of 2,6-dialkylaniline which comprises the reaction of 1,3-dialkyl-5-tertiary-butylbenzene with molecular bromine to form 2-bromo-1,3-dialkyl-5-tertiary-butylbenzene, which is subsequently reacted with 1,3-dialkylbenzene in the presence of hydrogen fluoride to form a mixture of 2-bromo-1,3-dialkylbenzene and 1,3-dialkyl-5-tertiary-butylbenzene, which is then reacted with ammonia in the presence of a catalytic amount of cuprous halide.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: July 20, 1982
    Assignee: Chevron Research Company
    Inventor: Shigeto Suzuki
  • Patent number: 4340758
    Abstract: A process for the preparation of 2,6-dialkylaniline which comprises the reaction of 1,3-dialkylbenzene with isobutene in the presence of a hydrogen fluoride catalyst to form 1,3-dialkyl-5-tertiary-butylbenzene, which is subsequently nitrated in the presence of a soluble mercuric salt catalyst to form 2-nitro-1,3-dialkyl-5-tertiary-butylbenzene, which is then catalytically hydrogenated to give 2,6-dialkyl-4-tertiary-butylaniline, followed by pyrolysis in the presence of a heterogeneous acidic catalyst.
    Type: Grant
    Filed: July 6, 1981
    Date of Patent: July 20, 1982
    Assignee: Chevron Research Company
    Inventors: Seymour J. Lapporte, David M. Marquis
  • Patent number: 4308397
    Abstract: Alkyl alkoxyacetates from C.sub.3 -C.sub.6 secondary alcohols, formaldehyde and carbon monoxide at a temperature of 5.degree. C. to -20.degree. C. and a carbon monoxide pressure of 0.5 to 275 atm.
    Type: Grant
    Filed: April 11, 1980
    Date of Patent: December 29, 1981
    Assignee: Chevron Research
    Inventor: Shigeto Suzuki
  • Patent number: 4304928
    Abstract: This invention relates to a process for producing 2-alkoxyacrylate by heating an alkyl 2,2-dialkoxypropionate with a molar amount each of a heterocyclic amine and an organic carboxylic acid halide in the presence of a catalytic amount of an inorganic base.
    Type: Grant
    Filed: April 18, 1980
    Date of Patent: December 8, 1981
    Assignee: Chevron Research Company
    Inventor: James L. Platt, Jr.
  • Patent number: 4283581
    Abstract: A catalyst composition having an intrinsic surface area above about 60 square meters per gram as measured by the BET nitrogen adsorption method, said catalyst comprising from about 1 to 30 weight percent of a finely divided silica component, and from about 1 to 99 weight percent of a hydrogenating component comprising copper in either elemental or compound form and zinc oxide.
    Type: Grant
    Filed: November 23, 1979
    Date of Patent: August 11, 1981
    Assignee: Chevron Research Company
    Inventor: John B. Wilkes
  • Patent number: 4282013
    Abstract: In a reduced-pressure process for distilling crude maleic anhydride recovered by separation from an organic absorbent wherein reduced pressure is obtained using a liquid ring-seal vacuum pump, the improvement which comprises sealing the liquid ring-seal vacuum pump by circulating a maleic anhydride absorbent from a regenerating zone through the vacuum pump chamber.
    Type: Grant
    Filed: November 14, 1977
    Date of Patent: August 4, 1981
    Assignee: Chevron Research Company
    Inventors: Frederick C. Franklin, Stephen G. Paradis
  • Patent number: 4282343
    Abstract: As new products, poly-(alpha-alkoxy)acrylamides containing 1 to 12, preferably 1 to 5 carbon atoms in the alkoxy group. The foregoing polymeric materials are readily complexed with water or low molecular weight hydroxy- or thiol-containing organic compounds. The polymers are useful as oil recovery agents.
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: August 4, 1981
    Assignee: Chevron Research Company
    Inventor: James L. Platt, Jr.
  • Patent number: 4281174
    Abstract: Preparation of dialkyl oxalates by the oxidative carbonylation of alcohols which comprises reacting a mixture of carbon monoxide and air with an alcohol in the presence of a catalytic amount of a catalyst comprising palladium in complex combination with a ligand, a small amount of a quinone, and a redox agent.Advantageously the reaction is carried out in the presence of a solvent.
    Type: Grant
    Filed: April 21, 1980
    Date of Patent: July 28, 1981
    Assignee: Chevron Research Company
    Inventor: Steven P. Current
  • Patent number: 4259246
    Abstract: A process for producing maleic anhydride from a C.sub.4 hydrocarbon selected from n-butane and n-butene feed which comprises: (a) feeding the C.sub.4 hydrocarbon and air to a reactor; (b) contacting the C.sub.4 hydrocarbon and air in the reactor with a catalyst comprising vanadium and phosphorus oxides at reaction conditions including a temperature between 550.degree. and 1000.degree. F. so as to obtain a reactor effluent containing maleic anhydride, unreacted butane, nitrogen, oxygen, and acrylic, acetic or maleic acid or mixtures of the foregoing acids; (c) removing maleic anhydride from the reactor effluent to obtain maleic anhydride-lean effluent; (d) removing said acids from at least a portion of the maleic anhydride-lean effluent to obtain a purified recycle stream containing less than 100 ppm of the acids; and (e) recycling the purified stream to the reactor. Preferably the acids are removed in step (d) by water and/or caustic scrubbing the maleic anhydride-lean effluent.
    Type: Grant
    Filed: October 15, 1979
    Date of Patent: March 31, 1981
    Assignee: Chevron Research Company
    Inventors: Kiran R. Bakshi, David M. Marquis, Stephen G. Paradis
  • Patent number: 4251467
    Abstract: Symmetrical 1,3-dichloroacetone is prepared by contacting chlorine with an aqueous mixture of acetone, monochloroacetone, or mixtures thereof and an iodine-containing promoter.
    Type: Grant
    Filed: September 2, 1976
    Date of Patent: February 17, 1981
    Assignee: Chevron Research Company
    Inventor: Victor P. Kurkov