Patents Represented by Attorney George J. Darsa
  • Patent number: 4159996
    Abstract: A method for preparing alkane diamines by initially reacting a vicinal nitroketone with a primary amine hydrochloride thereby forming a nitroalkyliminoalkane or a nitrooximinoalkane and thereafter catalytically hydrogenating the nitroalkylimino- or nitrooximinoalkane to a diamine.
    Type: Grant
    Filed: October 31, 1977
    Date of Patent: July 3, 1979
    Assignee: Texaco Inc.
    Inventors: Richard F. Love, Stanley R. Newman, John M. Larkin
  • Patent number: 4153637
    Abstract: A process for the dehydroisomerization of hydrocarbons in the presence of a catalyst composed of a metal of Group VIII supported on mordenite in hydrogen form and treated with ammonia.
    Type: Grant
    Filed: December 23, 1977
    Date of Patent: May 8, 1979
    Assignee: S.A. Texaco Belgium n.v.
    Inventors: Walter F. DE Vleesschauwer, Alan Molyneux
  • Patent number: 4149993
    Abstract: A process for the hydroisomerization of paraffinic hydrocarbons employing a catalyst composed of a noble metal, alumina and chlorine. The catalyst is prepared by treating a composite of noble metal and alumina with an aluminum compound such as an inorganic or organic salt of aluminum, preferably aluminum nitrate, calcining the treated composite and thereafter contacting the treated composite with a conventional chloride activating agent. By treating and calcining the composite with an aluminum salt, the amount of noble metal retained on the catalyst's surface during chloride activation is maximized enabling high conversions of normal paraffins to isoparaffins to be realized.
    Type: Grant
    Filed: March 6, 1978
    Date of Patent: April 17, 1979
    Assignee: Texaco Inc.
    Inventors: Babu Y. Rao, John T. Nolan, Jr., John H. Estes
  • Patent number: 4138444
    Abstract: Isobutane is self-alkylated to an alkylate composition having high octane components including trimethylpentanes in the presence of a solid catalyst and a minor amount of a C.sub.5 and higher olefin. The self-alkylation process utilizes a chlorided alumina catalyst having from about 4 to 15 weight percent chlorine. The olefins of choice employed in the isobutane self-alkylation reaction are isoolefins having 6 or 7 carbons. The isobutane may be derived from the isomerization of n-butane and the isomerization process may be integrated with the self-alkylation process.
    Type: Grant
    Filed: November 3, 1977
    Date of Patent: February 6, 1979
    Assignee: Texaco Inc.
    Inventors: Sheldon Herbstman, Edward L. Cole, John H. Estes
  • Patent number: 4137254
    Abstract: Aromatic nitriles are prepared from methylated aromatic hydrocarbons, such as toluene, xylene, tri- and tetramethylbenzenes by contacting at an elevated temperature with a nitroaromatic compound and ammonia in the presence of a catalyst composed of two or more metal oxides of the metals of Groups I B, III B, V A, VI B, VII B and VIII of the Periodic Table. A valuable coproduct of the method is an aromatic amine.
    Type: Grant
    Filed: July 27, 1977
    Date of Patent: January 30, 1979
    Assignee: Texaco, Inc.
    Inventor: John M. Larkin
  • Patent number: 4137267
    Abstract: A catalytic hydrogenation process for preparing alkyl-1,3-diaminopropanes by contacting an alkyl aminopropionitrile in the liquid phase with hydrogen and ammonia in the presence of a non-reactive organic solvent and a hydrogenation catalyst, the process conducted at a rising reaction temperature (.DELTA.T) along with the progressive vaporization of the solvent.
    Type: Grant
    Filed: February 22, 1977
    Date of Patent: January 30, 1979
    Assignee: Texaco Inc.
    Inventors: Robert E. Reid, Hyung K. Zang
  • Patent number: 4124608
    Abstract: 2-oxoalkanoic acids are prepared by contacting an alpha-nitroketone with an alkanoic acid anhydride, such as acetic anhydride, and a tertiary amine, such as pyridine, thereby forming a 2-alkanoyloxy-2-alkenoic acid and thereafter hydrolyzing the alkenoic acid with an aqueous non-oxidizing acid, such as hydrochloric acid.
    Type: Grant
    Filed: August 3, 1977
    Date of Patent: November 7, 1978
    Assignee: Texaco Inc.
    Inventor: John M. Larkin
  • Patent number: 4113789
    Abstract: A process for the hydroisomerization of paraffinic hydrocarbons employing a catalyst composed of a noble metal, alumina and chlorine. The catalyst is prepared by treating a composite of noble metal and alumina with an aluminum compound such as an inorganic or organic salt of aluminum, preferably aluminum nitrate, calcining the treated composite and thereafter contacting the treated composite with a conventional chloride activating agent. By treating and calcining the composite with an aluminum salt, the amount of noble metal retained on the catalyst's surface during chloride activation is maximized enabling high conversions of normal paraffins to isoparaffins to be realized.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: September 12, 1978
    Assignee: Texaco Inc.
    Inventors: Babu Y. Rao, John T. Nolan, Jr., John H. Estes
  • Patent number: 4113657
    Abstract: A process for the alkylation of alkanes with olefins under alkylation conditions with a catalyst having improved long term activity and composed of alumina and chlorine. The improved catalyst is prepared by contacting a catalytically active chlorided alumina composite catalyst with aluminum chloride. In a preferred embodiment the active catalyst is heat treated in an oxidizing atmosphere prior to contacting with aluminum chloride.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: September 12, 1978
    Assignee: Texaco Inc.
    Inventors: Sheldon Herbstman, Allen N. Webb, John H. Estes
  • Patent number: 4098839
    Abstract: A process for oligomerizing olefins having 2 to 5 carbon atoms in the molecule employing a novel sulfur containing molybdenum supported catalyst composed of from about 5.0 to 11.0 weight percent molybdenum, 3.0 to 7.0 weight percent sulfur and the remainder support. The catalyst may have present additional members such as platinum, palladium, rhodium, ruthenium, cobalt, nickel, rhenium and tungsten.
    Type: Grant
    Filed: October 28, 1975
    Date of Patent: July 4, 1978
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Elmar Wilms, Georg Michalczyk
  • Patent number: 4092327
    Abstract: 3-Acylisoxazolines are prepared by reacting an alkene with an alpha-nitroketone in the presence of an organic acid catalyst.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: May 30, 1978
    Assignee: Texaco Inc.
    Inventor: Roger G. Duranleau
  • Patent number: 4089867
    Abstract: Diacylfurazan oxides are prepared by catalytic dimerization of alpha-nitroketones.
    Type: Grant
    Filed: November 11, 1976
    Date of Patent: May 16, 1978
    Assignee: Texaco Inc.
    Inventors: Roger G. Duranleau, John M. Larkin, Stanley R. Newman
  • Patent number: 4083800
    Abstract: A process for the alkylation of alkanes with olefins under alkylation conditions employing a regenerated catalyst having improved activity. The regenerated catalyst is prepared by contacting a deactivated chlorided alumina catalyst in a non-oxidizing atmosphere at a temperature between 400.degree. and 1200.degree. F., thereafter contacting said catalyst in an oxidizing atmosphere at a temperature between 700.degree. and 1200.degree. F. and subsequently rechloriding said catalyst at a temperature between 200.degree. and 800.degree. F.
    Type: Grant
    Filed: December 2, 1976
    Date of Patent: April 11, 1978
    Assignee: Texaco Inc.
    Inventors: Sheldon Herbstman, John H. Estes
  • Patent number: 4082792
    Abstract: Secondary alkylammonium 3-secondary alkylaminoalkanoates are prepared by reacting a secondary alkyl primary amine and an alkenoic acid in the presence of a primary or secondary alcohol.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: April 4, 1978
    Assignee: Texaco Inc.
    Inventors: Jack H. Kolaian, John A. Patterson, Frank K. Ward
  • Patent number: 4081404
    Abstract: A process for oligomerizing unsaturated hydrocarbons having 2 to 5 carbon atoms in the molecule employing a novel molybdenum-containing carrier catalyst.
    Type: Grant
    Filed: December 17, 1976
    Date of Patent: March 28, 1978
    Assignee: Deutsche Texaco Aktiengesellschaft
    Inventors: Elmar Wilms, Georg Michalczyk
  • Patent number: 4069226
    Abstract: A method of preparing acylisoxazolines by contacting an alkene with dinitrogen tetroxide and oxygen in the presence of a denitrating agent and calcium oxide.
    Type: Grant
    Filed: November 5, 1976
    Date of Patent: January 17, 1978
    Assignee: Texaco Inc.
    Inventors: Mahmoud S. Kablaoui, John M. Larkin, Robert E. Reid
  • Patent number: 4066716
    Abstract: A process for the alkylation of alkanes with olefins under alkylation conditions with a catalyst having improved long term activity and composed of alumina and chlorine. The improved catalyst is prepared by contacting a catalytically active chlorided alumina composite catalyst with vaporized aluminum chloride to add 2-15 wt. % of additional chlorine to said catalyst. In a preferred embodiment the active catalyst is heat treated in an oxidizing atmosphere prior to contacting with aluminum chloride.
    Type: Grant
    Filed: August 14, 1975
    Date of Patent: January 3, 1978
    Assignee: Texaco Inc.
    Inventors: Sheldon Herbstman, Allen N. Webb, John H. Estes
  • Patent number: 4061651
    Abstract: 3,5-disubstituted-4-nitroisoxazoles are prepared by catalytic condensation and dehydration of an alpha-nitroketone.
    Type: Grant
    Filed: May 11, 1976
    Date of Patent: December 6, 1977
    Assignee: Texaco Inc.
    Inventors: Richard F. Love, Roger G. Duranleau
  • Patent number: 4058541
    Abstract: 2-Alkanoyloxyalkanoic acids are prepared by contacting a nitroalkylnitrate or a nitroalcohol with an alkanoic acid in the presence of sulfuric acid.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: November 15, 1977
    Assignee: Texaco Inc.
    Inventor: Mahmoud S. Kablaoui
  • Patent number: 4058540
    Abstract: 2-Alkanoyloxyalkanoic acids are prepared by contacting a nitroalkylnitrate and/or a nitroalcohol with an alkanoic acid in the presence of calcium oxide or a calcium carboxylate.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: November 15, 1977
    Assignee: Texaco Inc.
    Inventor: Mahmoud S. Kablaoui