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
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
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
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
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.
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.
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.
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
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
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.
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.
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
Abstract: A process for oligomerizing unsaturated hydrocarbons having 2 to 5 carbon atoms in the molecule employing a novel molybdenum-containing carrier catalyst.
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
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
Abstract: 2-Alkanoyloxyalkanoic acids are prepared by contacting a nitroalkylnitrate or a nitroalcohol with an alkanoic acid in the presence of sulfuric acid.
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.