Using Crystalline Aluminosilicate Catalyst Patents (Class 585/475)
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Patent number: 4500419Abstract: A process is provided for conducting organic compound conversion over a catalyst composition comprising a supported crystalline zeolite having a high initial silica-to-alumina mole ratio, said supported zeolite being prepared by compositing said crystalline zeolite with alumina, reacting the composite with a particular hydrogen fluoride solution in a specified way, drying the hydrogen fluoride reacted composite, treating the dried composite by hydrolysis, ammonolysis and/or by contact with an ammonium salt solution, and calcining the resulting material.Type: GrantFiled: November 16, 1983Date of Patent: February 19, 1985Assignee: Mobil Oil CorporationInventors: Joseph N. Miale, Clarence D. Chang
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Patent number: 4500422Abstract: A process is provided for conducting organic compound conversion over a catalyst comprising a crystalline zeolite which has been treated by impregnation with an ammoniacal aluminum fluoride solution, contact with an ammonium salt solution, and calcination.Type: GrantFiled: November 16, 1983Date of Patent: February 19, 1985Assignee: Mobil Oil CorporationInventors: Joseph N. Miale, Clarence D. Chang
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Patent number: 4500420Abstract: A process is provided for conducting organic compound conversion over a catalyst comprising a zeolite composition prepared by a method which comprises compositing a specific zeolite material with alumina, impregnating the composite with an aqueous solution of an alkali metal fluoride under vacuum, contacting the impregnated composite with an ammonium salt solution and calcining the resulting material.Type: GrantFiled: November 16, 1983Date of Patent: February 19, 1985Assignee: Mobil Oil CorporationInventors: Joseph N. Miale, Clarence D. Chang
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Patent number: 4500421Abstract: A process is provided for conducting organic compound conversion over a catalyst comprising a crystalline zeolite which has been treated by reaction with a compound having a complex fluoroanion.Type: GrantFiled: November 16, 1983Date of Patent: February 19, 1985Assignee: Mobil Oil CorporationInventors: Clarence D. Chang, Joseph N. Miale
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Patent number: 4486616Abstract: A process for alkylation of aromatic hydrocarbon reactants to dialkylbenzene products, whereby chemically modified zeolite catalysts are treated with an organic acid to enhance their intrinsic para-selectivity in the alkylation reaction. The modified zeolites which may be so reselectivated or improved comprise those crystalline zeolites having a constraint index of 1 to 12, a silica to alumina mole ratio of at least 12, and having a minor proportion of the oxide form of one or more chemical elements (e.g. phosphorus and magnesium) deposited thereon.Type: GrantFiled: May 12, 1983Date of Patent: December 4, 1984Assignee: Mobil Oil CorporationInventors: Chin-Chiun Chu, Warren W. Kaeding
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Patent number: 4482774Abstract: Hydrocarbon conversion processes which use catalyst compositions comprising a core of silica with an overlying modified-silica zeolite, preferably containing aluminium, gallium or boron, show improved catalytic activity. The composites are prepared by introducing preformed silica particles, preferably with a crystallite size greater than 0.1.mu., into a reaction mixture comprising a silicon source, a source of the modifying element, and preferably an organic template such as a tetraalkylammonium compound to form the modified-silica zeolite with a constraint index of from 1 to 12. The weight ratio of the silica core to SiO.sub.2 in the reaction mixture is preferably 1:1 to 10:1.Type: GrantFiled: November 21, 1983Date of Patent: November 13, 1984Assignee: Exxon Research & Engineering Co.Inventor: Wicher T. Koetsier
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Patent number: 4465886Abstract: The present invention relates to selective conversion of certain hydrocarbon feedstocks to product rich in para-dialkyl substituent benzenes over a catalyst composition comprising a crystalline zeolite having deposited thereon a coating of silica which extensively covers and resides substantially exclusively on the external surface thereof.Type: GrantFiled: June 9, 1983Date of Patent: August 14, 1984Assignee: Mobil Oil CorporationInventor: Paul G. Rodewald
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Patent number: 4463209Abstract: Improved aromatic conversion processes are provided by novel regeneration techniques. Aromatic processes that would benefit from this invention include those processes using catalysts comprising zeolites having a silica to alumina mole ratio of at least about 12 and a constraint index within the approximate range of 1 to 12 and which require regeneration to burn off coke from said catalysts. The improvement of the instant invention resides in conducting said regeneration in the presence of steam under controlled conditions to enhance the activity of the catalysts.Type: GrantFiled: September 19, 1983Date of Patent: July 31, 1984Assignee: Mobil Oil CorporationInventors: Christine H. Kursewicz, John P. McWilliams
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Patent number: 4459426Abstract: A process for alkylating aromatic hydrocarbons with C.sub.2 to C.sub.4 olefins and for transalkylating alkyl or poly-alkylaromatic compounds with an aromatic hydrocarbon. A major portion of the aromatic hydrocarbon is recycled to the alkylation zone while the remainder thereof and poly-alkylaromatic hydrocarbons are subjected to transalkylation in a separate transalkylation zone. Mono-alkylaromatics produced in the alkylation zone are separated from the other reaction products prior to transalkylation.Type: GrantFiled: December 7, 1982Date of Patent: July 10, 1984Assignee: Union Oil Company of CaliforniaInventors: Texas V. Inwood, Carlyle G. Wight, John W. Ward
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Patent number: 4456780Abstract: There is disclosed a method for decreasing catalyst coking and extending the usable catalyst life by pre-treatment of the catalyst with steam and/or a phosphorus-containing compound. Catalysts benefiting from such pre-treatment comprise crystalline zeolites characterized by a silica to alumina mole ratio of at least 12 and a constraint index, as herein defined, within the approximate range of 1 to 12.Type: GrantFiled: July 20, 1983Date of Patent: June 26, 1984Assignee: Mobil Oil CorporationInventor: Lewis B. Young
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Patent number: 4441990Abstract: The present invention relates to novel cross-section shapes which are employed to form catalytic extrudates which may be employed in catalytically promoted processes including hydrocarbon processing operations. Such shapes include essentially rectangular shaped tubes, and triangular shaped tubes in cross section.Type: GrantFiled: May 28, 1982Date of Patent: April 10, 1984Assignee: Mobil Oil CorporationInventor: Yun-Yang Huang
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Patent number: 4423266Abstract: There is disclosed a method for decreasing catalyst coking and extending the usable catalyst life by pre-treatment of the catalyst with steam and/or a phosphorus-containing compound. Catalysts benefiting from such pre-treatment comprise crystalline zeolites characterized by a silica to alumina mole ratio of at least 12 and a constraint index, as herein defined, within the approximate range of 1 to 12.Type: GrantFiled: July 30, 1982Date of Patent: December 27, 1983Assignee: Mobil Oil CorporationInventor: Lewis B. Young
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Patent number: 4421941Abstract: Disclosed is a zeolite base catalyst useful particularly for the selective production of para-dialkylsubstituted benzene. The catalyst comprises a porous crystalline zeolite having silica deposited thereon and having incorporated therein phosphorous. Described also in the process for making the catalyst and the parameters for the use of the catalyst in dialkylation processes.Type: GrantFiled: September 10, 1982Date of Patent: December 20, 1983Assignee: Mobil Oil CorporationInventors: David H. Olson, Paul G. Rodewald
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Patent number: 4418235Abstract: A method is provided for increasing the catalytic activity of acid zeolite catalysts characterized by a silica to alumina mole ratio of at least 12 and a constraint index within the approximate range of 1 to 12, comprising contacting said zeolite catalysts with water for a sufficient treating time, temperature and water partial pressure to bring about said increased activity. The increase in catalytic activity is within a zone of enhanced activity, said zone is defined as encompassing all those conditions of treating time, temperature and water partial pressure and combinations thereof which yield catalytic activities greater than initial catalyst activity. The zeolite of enhanced activity of the method of the present invention can be utilized in improved acid catalyzed hydrocarbon conversion processes such as cracking, hydrocracking, alkylation, dealkylation, transalkylation, isomerization, dimerization, oligomerization, polymerization, addition, disproportionation, aromatization and hydration.Type: GrantFiled: December 30, 1981Date of Patent: November 29, 1983Assignee: Mobil Oil CorporationInventors: Werner O. Haag, Rudolph M. Lago
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Patent number: 4394251Abstract: Hydrocarbon conversion processes with crystalline silicates surrounded by an alumina containing isostructural shell are claimed.Type: GrantFiled: April 28, 1981Date of Patent: July 19, 1983Assignee: Chevron Research CompanyInventor: Stephen J. Miller
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Patent number: 4386230Abstract: Hydrocarbons e.g. toluene and oxyhydrocarbons e.g. methanol are converted to other hydrocarbons by being contacted under conversion conditions with a catalyst comprising zeolite Nu-5.Type: GrantFiled: December 17, 1981Date of Patent: May 31, 1983Assignee: Imperial Chemical Industries PLCInventors: Philip J. Hogan, Allan Stewart, Thomas V. Whittam
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Patent number: 4384155Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, i.e., conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkyl-benzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g, at least 0.25 weight percent of the element cadmium and optionally the element phosphorus, said elements being present in the form of their oxides.Type: GrantFiled: November 4, 1981Date of Patent: May 17, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4380685Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g. conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g., at least 0.25 weight percent of the elements iron and/or cobalt and optionally the element phosphorus, said elements being present in the form of their oxides.Type: GrantFiled: November 4, 1981Date of Patent: April 19, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4375573Abstract: Para-Disubstituted aromatics are produced in the presence of a catalyst comprising zeolite ZSM-48. Selective cracking of para-isomers may also be accomplished to produce mixtures rich in meta-isomers.Type: GrantFiled: January 27, 1982Date of Patent: March 1, 1983Assignee: Mobil Oil CorporationInventor: Lewis B. Young
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Patent number: 4374294Abstract: A zeolite catalyst composition suitable for para-selective conversion of substituted aromatic compounds, e.g., conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. Such a composition comprises a zeolite catalyst component having a silica to alumina mole ratio of at least 12 and a constraint index of about 1 to 12, and a minor amount, e.g., at least 0.5 weight percent of a Group IIIA element, e.g., scandium, yttrium or Rare Earth elements, and optionally phosphorus, said elements being present in the form of their oxides.Type: GrantFiled: September 17, 1981Date of Patent: February 15, 1983Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4370508Abstract: A process is provided for modifying ZSM-5 type zeolite catalysts with gaseous nitrogen-based treating agents in order to enhance the para-selective properties of such catalysts for the conversion of aromatic materials to dialkyl-substituted benzene compounds. Nitrogen-based treating agents include nitrogen dioxide and ammonia. Catalyst compositions so treated can be used in alkylation, transalkylation or disproportionation processes to provide product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.Type: GrantFiled: June 26, 1981Date of Patent: January 25, 1983Assignee: Mobil Oil CorporationInventor: Warren W. Kaeding
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Patent number: 4367359Abstract: A process is provided for modifying ZSM-5 type zeolite catalysts with carbon dioxide treating agent in order to enhance the para-selective properties of such catalysts for the conversion of aromatic materials to dialkyl-substituted benzene compounds. Catalyst compositions so treated can be used in alkylation, transalkylation or disproportionation processes to provide product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.Type: GrantFiled: June 26, 1981Date of Patent: January 4, 1983Assignee: Mobil Oil CorporationInventor: Warren W. Kaeding
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Patent number: 4365104Abstract: A process is provided for modifying ZSM-5 type zeolite catalysts with sulfur-based treating agents in order to enhance the para-selective properties of such catalysts for the conversion of aromatic materials to dialkyl-substituted benzene compounds. Sulfur-based treating agents include hydrogen sulfide and sulfur dioxide. Catalyst compositions so treated can be used in alkylation, transalkylation or disproportionation processes to provide product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.Type: GrantFiled: June 26, 1981Date of Patent: December 21, 1982Assignee: Mobil Oil CorporationInventor: Warren W. Kaeding
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Patent number: 4361713Abstract: A process is provided for modifying ZSM-5 type zeolite catalysts with halogen-based treating agents in order to enhance the para-selective properties of such catalysts for the conversion of aromatic materials to dialkyl-substituted benzene compounds. Halogen-based treating agents include HCl, HBr, Cl.sub.2, Br.sub.2, CCl.sub.4, GeCl.sub.4 and mixtures thereof. Catalyst compositions so treated can be used in alkylation, transalkylation or disproportionation processes to provide product mixtures having exceptionally high concentrations of the para-dialkylbenzene isomer.Type: GrantFiled: June 26, 1981Date of Patent: November 30, 1982Assignee: Mobil Oil CorporationInventor: Warren W. Kaeding
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Patent number: 4358397Abstract: A modified zeolite catalyst composition useful for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of Group IV A (Ti, Zr, Hf), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: December 31, 1980Date of Patent: November 9, 1982Assignee: Mobil Oil CorporationInventor: Chin C. Chu
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Patent number: 4356338Abstract: There is disclosed a method for decreasing catalyst coking and extending the usable catalyst life by pre-treatment of the catalyst with steam and/or a phosphorus-containing compound. Catalysts benefiting from such pre-treatment comprise crystalline zeolites characterized by a silica to alumina mole ratio of at least 12 and a constraint index, as herein defined, within the approximate range of 1 to 12.Type: GrantFiled: October 8, 1980Date of Patent: October 26, 1982Assignee: Mobil Oil CorporationInventor: Lewis B. Young
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Patent number: 4347397Abstract: A novel process for the reduction of durene produced in a methanol to gasoline conversion process is disclosed wherein either the total effluent from said process or a bottoms fraction containing durene is contacted with an isomerization catalyst at elevated temperatures in order to convert said durene.Type: GrantFiled: April 27, 1981Date of Patent: August 31, 1982Assignee: Mobil Oil CorporationInventors: Francis G. Dwyer, Albin Huss, Jr.
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Patent number: 4341622Abstract: Benzene, toluene and xylenes are prepared from heavy reformate in substantially the proportion in said reformate of single ring aromatic compounds bearing none, one or two methyl groups by contacting said heavy reformate at 800.degree.-1000.degree. F. with a zeolite of low acid activity.Type: GrantFiled: December 4, 1980Date of Patent: July 27, 1982Assignee: Mobil Oil CorporationInventors: Samuel A. Tabak, Roger A. Morrison
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Patent number: 4329533Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with metal compounds of elements from Group IA of the Periodic Chart, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: May 5, 1980Date of Patent: May 11, 1982Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4327236Abstract: A new catalytic composition and its method of preparation are presented. The catalytic composition comprises a crystalline borosilicate and a porous refractory inorganic oxide, said borosilicate and said inorganic oxide having been intimately admixed with one another, said borosilicate comprising a molecular sieve material having the following composition in terms of mole ratios of oxides:0.9.+-.0.2 M.sub.2/n O:B.sub.2 O.sub.3 :YSiO.sub.2 :ZH.sub.2 Owherein M is at least one cation having a valence of n, Y is between 4 and about 600, and Z is between 0 and about 160.The catalytic composition can be used for the conversion of hydrocarbon streams, e.g., the isomerization of xylene feedstocks.Type: GrantFiled: August 29, 1980Date of Patent: April 27, 1982Assignee: Standard Oil Company (Indiana)Inventor: Marvin R. Klotz
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Patent number: 4302620Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of Group IV A (Ti, Zr, Hf), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: October 29, 1980Date of Patent: November 24, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4302622Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of scandium, yttrium and/or samarium, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: December 2, 1980Date of Patent: November 24, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4302621Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of Group V A of the Periodic Chart (V, Nb and Ta), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: October 29, 1980Date of Patent: November 24, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun C. Chu
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Patent number: 4300012Abstract: A catalytic composite of improved selectivity and a method of manufacture is disclosed. The catalytic composite is particularly effective with respect to the transalkylation of toluene. The catalytic composite is characterized by a method of preparation which comprises subjecting a mordenite alumina to an aqueous ammoniacal treatment at a pH of at least about 9.5; calcining the resulting mordenite to an aqueous solution containing a boron salt; and calcining the resulting mordenite alumina to provide said catalytic composite.Type: GrantFiled: November 12, 1980Date of Patent: November 10, 1981Assignee: UOP Inc.Inventors: Hosheng Tu, Stephen W. Sohn
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Patent number: 4300011Abstract: Selective reactions of hydrocarbons and/or oxygenated hydrocarbons are conducted in the presence of catalysts comprising one or more zeolites characterized by a silica to alumina mole ratio of at least 12 and a constraint index in the approximate range of 1 to 12, said catalysts are contacted with bulky heterocyclic organic nitrogen compounds. Said nitrogen compounds have an effective critical dimension of greater than 6.2 Angstroms and a pKa of between about 3 and 9. The process of this invention is particularly useful in the production of dialkylbenzene derivatives low in the ortho-isomer.Type: GrantFiled: April 28, 1980Date of Patent: November 10, 1981Assignee: Mobil Oil CorporationInventor: Louis D. Rollmann
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Patent number: 4292169Abstract: A hydrocarbon conversion catalyst suitable for conversion of heavy hydrocarbon oils containing large amounts of metallic contaminants, such as petroleum residua, to lower boiling products comprises a porous inorganic oxide such as bulk alumina composited with an inorganic oxide gel matrix such as silica-alumina, and a crystalline aluminosilicate zeolite.Type: GrantFiled: January 8, 1979Date of Patent: September 29, 1981Assignee: Exxon Research & Engineering Co.Inventor: Elroy M. Gladrow
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Patent number: 4291186Abstract: Toluene is transalkylated utilizing a catalyst comprising mordenite and arsenic.Type: GrantFiled: March 13, 1980Date of Patent: September 22, 1981Assignee: UOP Inc.Inventor: Hosheng Tu
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Patent number: 4288647Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of the alkaline-earth metals (Ca, Sr, Ba), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: March 10, 1980Date of Patent: September 8, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4278827Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of germanium, tin and/or lead, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: April 7, 1980Date of Patent: July 14, 1981Assignee: Mobil Oil CorporationInventors: Chin-Chiun Chu, Warren W. Kaeding
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Patent number: 4276437Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of gallium, indium and/or thallium, and optionally phosphorus, to deposit thereon a minor proportion of such elements on the zeolite.Type: GrantFiled: May 23, 1980Date of Patent: June 30, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4276438Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of copper, silver and/or gold, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: May 27, 1980Date of Patent: June 30, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4275256Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of manganese and/or rhenium, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: February 25, 1980Date of Patent: June 23, 1981Assignee: Mobil Oil CorporationInventors: Chin-Chiun Chu, Warren W. Kaeding
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Patent number: 4260843Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of beryllium, and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: February 25, 1980Date of Patent: April 7, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4259537Abstract: A process for the conversion of aromatic compounds to dialkylbenzene compounds rich in the 1,4-dialkylbenzene isomer. The reaction is carried out in the presence of a particular type of zeolite catalyst having a silica to alumina mole ratio of at least 12 and a constraint index of about 1-12, said catalyst having been modified by treatment with compounds of the Group VIA metals (Cr, Mo, W), and optionally phosphorus, to deposit a minor proportion of such elements on the zeolite.Type: GrantFiled: March 17, 1980Date of Patent: March 31, 1981Assignee: Mobil Oil CorporationInventor: Chin-Chiun Chu
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Patent number: 4247728Abstract: A new crystalline zeolite, designated ZSM-43, a method of making same and the use thereof in catalytic conversion of organic compounds is the subject of this application. The new zeolite has a composition, in the anhydrous state, expressed in terms of mole ratios of oxides, as follows:(0.6 to 2.1)M.sub.2/n O:Al.sub.2 O.sub.3 :xSiO.sub.2wherein M is at least one cation having a valence n and x is at least 5, and is characterized by a specified X-ray powder diffraction pattern.Type: GrantFiled: November 8, 1979Date of Patent: January 27, 1981Assignee: Mobil Oil CorporationInventors: Mae K. Rubin, Edward J. Rosinski, Charles J. Plank
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Patent number: 4245130Abstract: The present invention relates to a process for the hydrocatalytic treatment of hydrocarbon feedstock which is a mixture of alkyl aromatics containing at least one di- or polymethyl benzene and an alkyl benzene selected from ethyl-benzene, methyl ethyl-benzene and propylbenzene by contacting the mixture at 300.degree. to 500.degree. C., a pressure of 0 to 100 bars gauge and in the presence of hydrogen with a gallium containing aluminosilicate catalyst and recovering the desired product. The aluminosilicate has a silica to alumina ratio of between 10:1 and 100:1 on a molar bases. The xylene products are useful raw materials as such or for making the corresponding dicarboxylic acids.Type: GrantFiled: April 18, 1979Date of Patent: January 13, 1981Assignee: The British Petroleum Company LimitedInventors: John R. Jones, Dennis C. Wood
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Patent number: 4237329Abstract: This invention relates to a process for the production of alkylbenzenes, which comprises reacting benzene with at least one aromatic hydrocarbon substituted by alkyl groups and containing 9 or more carbon atoms, in the presence of an acid leached hydrogen form mordenite catalyst having a silica (SiO.sub.2)/alumina (Al.sub.2 O.sub.3) molar ratio of 15 to 21 and a sodium content of 0.05 weight % or less as Na.sub.2 O.Type: GrantFiled: April 13, 1979Date of Patent: December 2, 1980Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Setsuo Kamiyama, Yukio Nagashima, Hiroshi Furukawa, Katsumi Kaneko
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Patent number: 4211886Abstract: Benzene, toluene and xylene are produced in high yield from aromatic naphtha by a processing technique which combines (1) high temperature isomerization of eight carbon atom aromatics over a catalyst having relatively low activity and constrained access to the internal pore surface and (2) processing of heavy single ring aromatics of nine or more carbon atoms together with toluene under dealkylation/transalkylation conditions. The effluents of the two reactions are blended for processing through separation and recovery equipment. The unique chemistry of the isomerization stage results in splitting off alkyl side chains of two or more carbon atoms while retaining methyl groups attached to aromatic rings. Because of these reaction characteristics, full range reformate is advantageously added to the isomerizer charge for conversion to methyl benzene and redistribution of methyl groups to the thermodynamic equilibrium values.Type: GrantFiled: September 25, 1978Date of Patent: July 8, 1980Assignee: Mobil Oil CorporationInventors: Samuel A. Tabak, Roger A. Morrison
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Patent number: 4210770Abstract: Process for manufacturing a catalyst for hydrocarbon conversion consisting of a mordenite containing less than 0.5% by weight of sodium, having a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 from 10 to 100 and further containing at least one metal selected from cobalt, nickel, silver and palladium, wherein said metal in incorporated to a mordenite of the sodic form having a molar ratio SiO.sub.2 /Al.sub.2 O.sub.3 close to 10, the major portion of the sodium is eliminated, the resulting catalyst mass is dried from about 50.degree. to 150.degree. C., and then subjected to a first so-called dry calcination between 300.degree. and 700.degree. C., in the presence of a dry, inert or oxidizing gas containing less than 1% by volume of steam, and to a second so-called wet calcination between 250.degree. and 700.degree. C., in the presence of either steam or an inert or oxidizing gas containing at least 3% of steam.Type: GrantFiled: February 23, 1979Date of Patent: July 1, 1980Assignee: Institut Francais du PetroleInventor: Christian Marcilly
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Patent number: 4194058Abstract: Process for the conversion of aromatic hydrocarbons. Especially useful for the reaction of an alkylating agent, preferably propylene, with an aromatic hydrocarbon. Novel feature is the use of a catalyst comprising nickel, molybdenum, platinum and a zeolitic carrier material.Type: GrantFiled: December 26, 1978Date of Patent: March 18, 1980Assignee: UOP Inc.Inventor: Lee Hilfman