Using Metal-containing Catalyst Patents (Class 585/411)
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Patent number: 8735310Abstract: To improve stability of catalytic performance, an aromatizing catalyst for converting lower hydrocarbons into aromatic compounds is regenerated. A regeneration process of the aromatizing catalyst according to the present invention includes the steps of: (a) reacting the aromatizing catalyst with a hydrogen gas in an atmosphere containing the hydrogen gas after using the aromatizing catalyst in an aromatizing reaction for converting lower hydrocarbons into aromatic compounds; (b) decreasing a temperature of the atmosphere containing the hydrogen gas reacted with the aromatizing catalyst, by supplying one of an inert gas and a reducing gas to the atmosphere; (c) reacting the aromatizing catalyst reacted with this inert gas, with an oxidizing gas; and (d) reacting the aromatizing catalyst reacted with the oxidizing gas, with a reducing gas.Type: GrantFiled: March 17, 2008Date of Patent: May 27, 2014Assignee: Meidensha CorporationInventors: Hongtao Ma, Yuji Ogawa
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Patent number: 8461404Abstract: A prolongated silica bound zeolite support comprising from about 85 wt % to about 95 wt % zeolite. A catalyst composition comprising a prolongated silica bound zeolite supporting at least one Group VIII metal and at least one halide. A process of making a prolongated silica bound zeolite support comprising mixing a zeolite, a prolongated silica, and water to form a mixture, and shaping the mixture into the prolongated silica bound zeolite support. A process of making a prolongated silica bound zeolite catalyst comprising mixing a zeolite, a prolongated silica, and water to form a mixture, shaping the mixture into a prolongated silica bound zeolite support, and adding one or more catalytic compounds to the prolongated silica bound zeolite support to form the prolongated silica bound zeolite catalyst.Type: GrantFiled: February 16, 2011Date of Patent: June 11, 2013Assignee: Chevron Phillips Chemical Company LPInventor: Gyanesh P. Khare
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Patent number: 8288602Abstract: The present invention describes a cost-efficient method for preparing di-substituted fluorenes in high yield.Type: GrantFiled: March 28, 2007Date of Patent: October 16, 2012Assignee: Total Petrochemicals Research FeluyInventors: Alexander Z. Voskoboynikov, Artyom Y. Le Bedev, Andrey F. Asachenko, Abbas Razavi
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Patent number: 8278237Abstract: A catalyst for producing aromatic compounds from lower hydrocarbons while improving activity life stability of methane conversion rate; benzene formation rate; naphthalene formation rate; and total formation rate of benzene, toluene and xylene is formed by loading molybdenum and copper on metallo-silicate serving as a substrate and then calcining the metallo-silicate. When the catalyst is reacted with a reaction gas containing lower hydrocarbons and carbonic acid gas, aromatic compounds are produced. In order to obtain the catalyst, it is preferable that molybdenum and copper are loaded on zeolite formed of metallo-silicate after the zeolite is treated with a silane compound larger than a pore of the zeolite in diameter and having an amino group and a straight-chain hydrocarbon group, the amino group being able to selectively react with the zeolite at a Bronsted acid point of the zeolite. It is preferable that a loaded amount of molybdenum is within a range of from 2 to 12 wt.Type: GrantFiled: February 13, 2008Date of Patent: October 2, 2012Assignee: Meidensha CorporationInventors: Shinichi Yamada, Tomohiro Yamada, Yuji Ogawa, Hirokazu Akiyama, Takuya Hatagishi
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Patent number: 7935856Abstract: The present invention relates to a method for preparing 1,5-dimethyltetralin using a dealuminated zeolite beta catalyst. The preparation method of 1,5-dimethyltetralin according to the present invention has the effects of not only showing high conversion and high selectivity of 1,5-dimethyltetralin but also of suppressing deactivation of a zeolite beta catalyst so as to enhance the catalyst life, by using the dealuminated zeolite beta catalyst.Type: GrantFiled: October 10, 2006Date of Patent: May 3, 2011Assignee: Hyosung CorporationInventors: Byoung-Whan Soh, Young-Gyo Choi
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Publication number: 20110060177Abstract: In a process for reducing the amount of benzene produced in a startup procedure for purification of an aromatic feedstream, the improvement comprising a start-up procedure including contacting said catalyst with said feedstream at elevated LHSV for a period of time sufficient to reduce benzene and/or toluene levels to a predetermined level, and proceeding under normal operational conditions.Type: ApplicationFiled: August 30, 2010Publication date: March 10, 2011Inventors: Timothy F. Kinn, Michael C. Clark
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Patent number: 7829155Abstract: The present invention provides a new monomer and methods of using the monomer to fabricate robust polymer surface coatings with controlled thicknesses between 1 and 5 nanometers. The coatings are composed of a new material containing polymerized monomers of 4-vinylbenzenepropanethiol. The polymer surface coating may be applied to metal and silicon. The method includes exposing a metal substrate to a solution of the monomer in hexanes in order to deposit a monolayer of the monomer onto the metal surface. The substrate is then irradiated with ultraviolet radiation in order to graft a thin polymer coating onto the surface. The procedure can be repeated in order to control the thickness of the coating between about 1 nm and 5 nm. Alternatively, thermally initiated polymerization or deposition of partially oligomerized monomers onto the surface provides nanothin coatings with identical performance.Type: GrantFiled: October 12, 2007Date of Patent: November 9, 2010Assignee: The University of Memphis Research FoundationInventors: Evgueni Pinkhassik, Larry Todd Banner, Benjamin T. Clayton
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Patent number: 7601881Abstract: A catalyst and process is disclosed to selectively upgrade a paraffinic feedstock to obtain an isoparaffin-rich product for blending into gasoline. The catalyst comprises a support of a tungstated oxide or hydroxide of a Group IVB (IUPAC 4) metal, a phosphorus component, and at least one platinum-group metal component which is preferably platinum. The catalyst has a structure other than a heteropoly anion structure.Type: GrantFiled: January 30, 2008Date of Patent: October 13, 2009Assignee: UOP LLCInventors: Ralph D. Gillespie, Feng Xu
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Patent number: 7525001Abstract: The present invention provides a novel process for highly selective preparation of 2,6-dialkyltetralin, a key precursor for 2,6-dimethylnaphthalene (2,6-DMN), which does not require an extra step for purifying various isomers obtained from the conventional processes for 2,6-DMN. The present invention is advantageous to improve the synthetic yield, to simplify the operation and thus to reduce the production cost, since different starting materials and different pathways are exploited and thus the additional steps are not necessary.Type: GrantFiled: February 25, 2005Date of Patent: April 28, 2009Assignee: Seoul National University Industry FoundationInventors: Young Gyu Kim, Woon Ki Kim, Byung Hyun Kim, Jong Gil Lee
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Patent number: 7431828Abstract: A two-stage hydrotreating process is disclosed wherein a hydrocarbon stream is first desulphurized followed by a dehydrogenation step, which process comprises in combination contacting the feed and hydrogen over a hydrotreating catalyst at hydrotreating conditions, heating the hydrotreated effluent and hydrogen-rich gas from the hydrotreating reactor and contacting said effluent and hydrogen gas over a hydrotreating catalyst in a post-treatment reactor at a temperature sufficient to increase the polyaromatic hydrocarbon content and lower the hydrogen content of said effluent.Type: GrantFiled: July 6, 2005Date of Patent: October 7, 2008Assignee: Haldor Topsoe A/SInventors: Michael G. Hunter, Rasmus G. Egeberg, Kim G. Knudsen
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Patent number: 6844478Abstract: New polycyclic cyclopentadiene compounds having the formula (II) wherein the various substituents and symbols R1, R2, R3, R4, R5, R6, R7, Z1 and Z2 and “n” have the meaning specified in the description.Type: GrantFiled: March 20, 2001Date of Patent: January 18, 2005Assignee: Polimeri Europa S.p.A.Inventors: Paolo Biagini, Diego Vigliarolo, Giampietro Borsotti, Roberto Santi
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Patent number: 6784331Abstract: Porous microcomposites have been prepared from perfluorinated ion-exchange polymer and metal oxides such as silica using the sol-gel process. Such microcomposites possess high surface area and exhibit extremely high catalytic activity.Type: GrantFiled: October 7, 2003Date of Patent: August 31, 2004Assignee: E. I. du Pont de Nemours and CompanyInventors: Mark Andrew Harmer, Qun Sun
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Publication number: 20030032850Abstract: A process for the removal of hydrocarbon contaminants, such as dienes and olefins, from an aromatics reformate by contacting an aromatics reformate stream with a hydrotreating catalyst and/or a molecular sieve. The hydrotreating catalyst substantially converts all dienes to oligomers and partially converts olefins to alkylaromatics. The molecular sieve converts the olefins to alkylaromatics. The process provides an olefin depleted product which can be passed through a clay treater to substantially convert the remaining olefins to alkylaromatics. The hydrotreating catalyst has a metal component of nickel, cobalt, chromium, vanadium, molybdenum, tungsten, nickel-molybdenum, cobalt-nickel-molybdenum, nickel-tungsten, cobalt-molybdenum or nickel-tungsten-titanium, with a nickel molybdenum/alumina catalyst being preferred. The molecular sieve is an intermediate pore size zeolite, preferably MCM-22. The clay treatment can be carried out with any clay suitable for treating hydrocarbons.Type: ApplicationFiled: October 8, 2002Publication date: February 13, 2003Inventors: Stephen H. Brown, Tarun K. Chaudhuri, Jose G. Santiesteban
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Patent number: 6504069Abstract: 5-Tolyl-pent-2-ene is cyclized in liquid phase in the present of an aliphatic hydrocarbon to produce the corresponding dimethyltetralin. The use of the aliphatic hydrocarbon effectively prevents a side reaction such as dimerization of 5-tolyl-pent-2-ene to provide dimethyltetralin in a high yield. Also, 5-tolyl-pent-2-ene is cyclized in liquid phase or vapor phase in the presence of a catalyst comprising a carrier supporting sulfate ions to produce the corresponding dimethyltetralin. The catalyst supporting sulfate ions shows a high catalytic activity event at low temperatures. Therefore, the cyclization of 5-tolyl-pent-2-ene is conducted in a wide temperature range from low temperatures to high temperatures.Type: GrantFiled: February 14, 2000Date of Patent: January 7, 2003Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Youichi Kyuuko, Norio Fushimi, Makoto Takagawa
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Patent number: 6472576Abstract: A process for producing 2,6-dimethylnapthalene from 1-(p-tolyl)-2-methylbutane, 1-(p-tolyl)-2-methylbutene or a mixture thereof by dehydrocyclization in the presence of a catalyst, comprising using non-acidic activated carbon as a catalyst.Type: GrantFiled: June 1, 2001Date of Patent: October 29, 2002Assignee: Optatech CorporationInventors: Christer Bergström, Marita Niemelä
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Publication number: 20010051754Abstract: A process for toluene disproportionation which obtains high xylene yields while minimizing ethylbenzene production employs a dual catalyst bed. The first bed employs an acid zeolite, e.g., ZSM-5 which disproportionates toluene and the downstream second bed uses an acid zeolite having hydrogenation-dehydrogenation activity, e.g., PtZSM-5, to selectively eliminate ethylbenzene.Type: ApplicationFiled: August 3, 1999Publication date: December 13, 2001Inventors: DARIA N. LISSY, SANJAY B. SHARMA, DAVID S. SHIHABI
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Patent number: 6172273Abstract: A composition is prepared by a method which comprises mixing a first solid material comprising a platinum group metal, a rhenium component, a porous carrier material and, optionally, a halogen component and a second solid material comprising silica and bismuth. The thus-obtained composition is employed as a catalyst in the conversion of hydrocarbons to aromatics. In an alternate embodiment, hydrocarbons are converted to aromatics by sequentially contacting the hydrocarbons with the first solid material and then the second solid material.Type: GrantFiled: February 23, 2000Date of Patent: January 9, 2001Assignee: Phillips Petroleum CompanyInventors: An-hsiang Wu, Charles A. Drake
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Patent number: 6127589Abstract: The invention concerns a preparation process for 2,6-dimethylnaphthalene in which 1-(p-tolyl)-2-methylbutane and/or 1-(p-tolyl)-2-methylbutene are dehydrocyclisized using a reduced vanadium catalyst. 2,6-dimethylnaphthalene can be used as starting material when manufacturing polyethylenenaphthalate. The conversion of this method is good and the selectivity of 2,6-dimethylnaphthalene can be improved by reducing the catalyst.Type: GrantFiled: September 15, 1998Date of Patent: October 3, 2000Assignee: Optatech OyInventors: Juha Jakkula, Vesa Niemi, Kari Vahteristo, Kari-Matti Sahala
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Patent number: 6126812Abstract: A method for optimizing the yield of aromatics and light olefins in a process for the conversion of cracked gasoline to aromatics and light olefins by separating the cracked gasoline into a light fraction and a heavy fraction and contacting the light fraction with a zeolite catalyst.Type: GrantFiled: July 14, 1998Date of Patent: October 3, 2000Assignee: Phillips Petroleum CompanyInventors: Charles Alfred Drake, An-Hsiang Wu, Scott Douglas Love
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Patent number: 6107534Abstract: An improved zeolite catalyst containing an acid-treated zeolite, a boron component and a zinc component manufactured by a novel method having certain process steps necessary for providing the improved zeolite catalyst. The process steps include a first steam treatment of an acid-treated zeolite, followed by incorporation of such zeolite with a boron component and a zinc component, followed by a second steam treatment. Processes are also disclosed for using the improved zeolite catalyst in the conversion of hydrocarbons, preferably non-aromatic hydrocarbons, to lower olefins (such as ethylene and propylene) and aromatic hydrocarbons (such as benzene, toluene, and xylene).Type: GrantFiled: August 25, 1999Date of Patent: August 22, 2000Assignee: Phillips Petroleum CompanyInventors: Charles A. Drake, An-hsiang Wu
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Patent number: 6083379Abstract: A process for desulfurizing and enhancing the octane of cracked gasoline by first aromatizing the cracked gasoline and, second, hydrodesulfurizing the resulting intermediate product stream.Type: GrantFiled: July 14, 1998Date of Patent: July 4, 2000Assignee: Phillips Petroleum CompanyInventors: Charles A. Drake, Scott Douglas Love
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Patent number: 6084132Abstract: Fluorescent dyes which fluoresce in a variety of colors are produced from substituted and un-substituted 6-ring and 8-ring aromatic diketones by reductive alkylation with alkyl halides in the presence of zinc.Type: GrantFiled: December 3, 1999Date of Patent: July 4, 2000Assignee: Rohm and Haas CompanyInventor: Peter J. Heffron
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Patent number: 6028027Abstract: Catalysts comprising iron and potassium and, if desired, further elements, which catalysts are suitable for dehydrogenating hydrocarbons to give the corresponding olefinically unsaturated hydrocarbons, are prepared by calcining a finely divided dry or aqueous mixture of an iron compound with a potassium compound and, if desired, compounds of further elements in a first step that agglomerates having a diameter of from 5 to 50 .mu.m and formed from smaller individual particles are obtained and, in a second step, preferably after shaping, calcining it at from 300 to 1000.degree. C., with the maximum calcination temperature in the second step preferably being at least 30.degree. below the calcination temperature in the first step. The catalysts thus prepared are useful, in particular, for dehydrogenating ethylbenzene to give styrene.Type: GrantFiled: March 17, 1998Date of Patent: February 22, 2000Assignee: BASF AktiengesellschaftInventors: Michael Baier, Christopher William Rieker, Otto Hofstadt, Wolfgang Buchele, Wolfgang Jurgen Popel, Hermann Petersen, Norbert Neth
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Patent number: 5952534Abstract: The invention is related to a process for making 2,6-dimethylnaphthalene from p-xylene and 1- or 2-butene or butadiene via 1-(p-tolyl)-2-methylbutane or 1-(p-tolyl)-2-methylbutane. 2,6-dimethylnaphthalene can be used for making polyethylenenaphthalate.Type: GrantFiled: March 20, 1998Date of Patent: September 14, 1999Assignee: Optatech OyInventors: Kari Vahteristo, Erkki Halme, Salme Koskimies, Sigmund M. Csicsery, Markku Laatikainen, Vesa Niemi
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Patent number: 5873994Abstract: An aromatization process for converting a portion of a cracked gasoline feedstock to aromatics utilizing a catalyst comprising an acid leached zeolite and tin under process conditions suitable for converting a portion of the cracked gasoline feedstock to aromatics.Type: GrantFiled: July 15, 1997Date of Patent: February 23, 1999Assignee: Phillips Petroleum CompanyInventors: Charles A. Drake, An-hsiang Wu
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Patent number: 5789593Abstract: The present invention relates to a process for preparing an indene, which involves reacting an indanone with hydrogen in the presence of a catalyst comprising one or more oxides, preferably metal oxides. Preferred oxides comprise elements from groups Ia, IIa, IIa, IVa, Va, VIa, Ib, IIb, IIIb, IVb, Vb, VIb, VIIb and VIII of the Periodic Table, or elements from the lanthanide group.Type: GrantFiled: March 6, 1997Date of Patent: August 4, 1998Assignee: Targar GmbHInventors: Jens Weiguny, Holger Borchert, Uwe Dingerdissen
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Patent number: 5712313Abstract: A process for carrying out a chemical equilibrium reaction is disclosed in which, in a first stage, one or more reactants are contacted with a fixed arrangement of a catalyst under conditions such that the reactants and the products of the reaction are gaseous, the unconverted reactants and products of the first stage being passed to a second stage, in which they are contacted with a fixed arrangement of a catalyst and the reaction allowed to proceed in the presence of an absorbent capable of absorbing a product of the reaction.Type: GrantFiled: February 26, 1996Date of Patent: January 27, 1998Assignee: Shell Oil CompanyInventors: Gert Jan Kramer, Jean Paul Lange
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Patent number: 5625102Abstract: A method of alkylating the side chain of alkyl-substituted aromatic hydrocarbons. The method comprises the steps of thermally treating an alumina by calcining in air and then degassing under vacuum to prepare an alumina carrier, loading an alkali metal on the alumina carrier by an impregnation method using the alkali metal dissolved in liquid ammonia, thermally treating the alkali metal loaded alumina carrier under vacuum to prepare a catalyst, then reacting an alkyl-substituted aromatic hydrocarbon with an aliphatic monoolefin, using the catalyst, under an atmosphere substantially free of oxygen, water and carbon dioxide gas to alkylate the side chain of the alkyl-substituted aromatic hydrocarbon.Type: GrantFiled: December 27, 1994Date of Patent: April 29, 1997Assignee: Mitsubishi Oil Co., Ltd.Inventors: Takaya Matsumoto, Yoshiichi Kumagai, Fumio Kumata
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Patent number: 5510554Abstract: In the preparation of 1,1'-binaphthyls substituted in the 2,2'-positions (and optionally substituted in one or more of positions 3 to 7 and/or 3' to 7'), a 1-halo-2-substituted naphthalene is reacted with a 2-substituted-1-naphthyl-magnesium halide in the presence of a catalyst. The catalyst comprises palladium and a phosphine ligand. Typical phosphine ligands include triphenylphosphine, 1,4-bis(diphenylphosphino)butane, 2,2'-bis(diphenylphosphinomethoxy)-1,1'-binaphthyl, and tetrakis(triphonylphosphine).Type: GrantFiled: November 14, 1994Date of Patent: April 23, 1996Assignee: Hoechst AktiengesellschaftInventors: Dieter Regnat, Hans-Jerg Kleiner
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Patent number: 5476977Abstract: 1,1,2,3,4,4,6-Heptamethyl-1,2,3,4-tetrahydronaphthalene, a novel naphthalenic compound, is useful as an intermediate for the preparation of 5,6,7,8-tetrahydro-3,5,5,6,7,8,8-heptamethyl-2-naphthalenecarbaldehyde. It is prepared by a process consisting of the addition of an olefin of formula ##STR1## wherein R.sup.1 and R.sup.2 represent different substituents and each defines a hydrogen atom or a methyl radical, with p-cymene. 4,4-Dimethyl-2-pentene [compound (III): R.sup.1 =CH.sub.3 ; R.sup.2 =H] is obtained by the co-metathesis reaction of an olefin of formula ##STR2## wherein R.sup.1 and R.sup.2 represent identical substituents designating each a hydrogen atom or a methyl radical, with an olefin of formula ##STR3## wherein R.sup.3 and R.sup.4 identical or different, designate each a hydrogen atom or a methyl radical in the presence of an appropriate catalyst consisting of Re.sub.2 O.sub.7 on an inert solid carrier, or of WCl.sub.6 /(C.sub.2 H.sub.5))/Bu.sub.4 Sn.Type: GrantFiled: August 5, 1994Date of Patent: December 19, 1995Assignee: Firmenich SAInventors: Jean-Paul Leresche, Yves Mentha
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Patent number: 5446226Abstract: A process for efficiently producing dimethylnaphthalene by a single-step reaction which comprises cyclizing dehydrogenating 5-tolyl-penta-2-ene in the presence of a catalyst comprising in combination (a) a solid acid such as crystalline aluminosilicate, silica-alumina or alumina; (b) a noble metal such as palladium and platinum; and a carrier such as carbon, silicon oxide, titanium oxide and zirconium oxide. The process results in simplification of production, effective utilization of reaction heat and rationalization of the heat balance.Type: GrantFiled: November 19, 1993Date of Patent: August 29, 1995Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Shinji Ozawa, Makoto Takagawa, Takayasu Fujimori
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Patent number: 5436380Abstract: A process for producing aromatic hydrocarbons comprises bringing hydrocarbons having 2 to 12 carbon atoms into contact with a modified crystalline galloaluminosilicate catalyst prepared by treating a crystalline galloaluminosilicate having a tool ratio of SiO.sub.2 /(Ga.sub.2 O.sub.3 +Al.sub.2 O.sub.3) in the range from 5 to 1000 with a sulfur-containing substance. The process of the invention is simple and suited for general application and the catalyst can be prepared at a low cost. Aromatic hydrocarbons can be produced efficiently from the material hydrocarbons by bringing them into contact with the modified galloaluminosilicate having the excellent catalytic activity. The process of the invention can be adopted widely and effectively in the petroleum refining, in the petroleum chemistry and in the chemical industry in general.Type: GrantFiled: January 5, 1994Date of Patent: July 25, 1995Assignee: Idemitsu Kosan, Co., Ltd.Inventors: Masahiko Sawa, Yasushi Wakushima, Kozo Takatsu
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Patent number: 5401892Abstract: A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1- or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific dimethylnaphthalenes from the aforesaid dimethyltetralins is disclosed wherein the orthotolylpentene or phenylhexane is cyclized to the dimethyltetralin using an ultra-stable crystalline aluminosilicate molecular sieve Y-zeolite.Type: GrantFiled: February 26, 1993Date of Patent: March 28, 1995Assignee: Amoco CorporationInventors: David L. Sikkenga, Ian C. Zaenger, Joyce D. Lamb, Gregory S. Williams
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Patent number: 5396008Abstract: There is disclosed a process for producing dimethyltetralin consisting of 1,5-, 1,6- and 2,6-dimethyltetralin which comprises cyclizing 5-tolyl-penta-2-ene in gaseous state in the presence of diluent by the use of a catalyst comprising a crystalline aluminosilicate and a carrier and optionally a molding assistant. The abovementioned process is capable of producing industrially useful dimethyltetralin as the starting raw material for dimethylnaphthalene with high yield and high selectivity with minimized side reactions over a long stabilized period.Type: GrantFiled: July 9, 1993Date of Patent: March 7, 1995Assignee: Mitsubishi Gas Chemical Co., Inc.Inventors: Shinji Ozawa, Makoto Takagawa, Kenji Dnamasa
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Patent number: 5382733Abstract: Disclosed herein is a process for preparing naphthalene or a derivative thereof, which comprises subjecting a benzene derivative having at least one substituted or non-substituted aliphatic hydrocarbon group and being capable of forming a naphthalene ring to cyclodehydrogenation in the presence of a zirconia catalyst containing chromium in an oxidized state.Type: GrantFiled: March 19, 1993Date of Patent: January 17, 1995Assignee: Mitsubishi Kasei CorporationInventors: Masayuki Otake, Akio Nakanishi
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Patent number: 5365001Abstract: A method for preparing a dialkylnaphthalene in one step by contacting an dialkylbenzene compound with a solid catalyst in a gas or liquid phase in the presence of hydrogen, using a catalyst having composition (I) or (II) below:(1)(M.sup.1).sub.a.(M.sup.2).sub.b.(SiO.sub.2.XAl.sub.2 O.sub.3).(Al.sub.2 O.sub.3).sub.c (I)(2) Mixture of II-(i) and II-(ii):(M.sup.3).sub.d.(Al.sub.2 O.sub.3) II-(i)(M.sup.4).sub.e.(SiO.sub.2.XAl.sub.2 O.sub.3) II-(ii)wherein M.sup.1 is a metal selected from the group consisting of metals belonging to group VIII of a periodic table and rhenium;M.sup.2 is a member selected from the group consisting of zinc, gallium, and oxides thereof;M.sup.3 is a metal belonging to group VIII of a periodic table;M.sup.4 is at least one alkali metal; anda, b, c, d, e, and X represent proportions, respectively.Type: GrantFiled: April 8, 1993Date of Patent: November 15, 1994Assignee: Teijin LimitedInventors: Koji Sumitani, Keizo Shimada, Seiji Itoh, Kimihiko Sato, Risuke Suzuki, Akio Namatame
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Patent number: 5362715Abstract: The invention is directed to a mixture of acetylpolyalkylindanes and acetylpolyalkyltetralines obtainable by cycloalkylation of p-cymene and/or p,.alpha.-dimethylstyrene and/or 8-p-cymenyl halides and/or 8-p-cymenyl alcohol with a mixture of alkenes consisting of one or more methylbutene isomers and one or more dimethylbutene isomers, followed by acetylation of the intermediate mixture of polyalkylindanes and polyalkyltetralines.Type: GrantFiled: April 15, 1993Date of Patent: November 8, 1994Assignee: PFW Aroma Chemicals B.V.Inventors: Amnon M. Cohen, Frank E. Conboy, Willem Lenselink, Everardus A. Oostveen
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Patent number: 5321178Abstract: A process for efficiently producing 2,6-dimethylnaphthalene which comprises subjecting 2-methyl-1-(p-tolyl)butene and/or 2-methyl-1-(p-tolyl)butane as the starting raw material to a cyclization dehydrogenation reaction in the presence of a catalyst comprising (a) a palladium component, (b) an alkali or alkaline earth metal compound and (c) aluminum oxide. The process enables the production of highly pure 2,6-dimethylnaphthalene in a high yield at a low cost. The catalyst used in the process affords high safety and stability.Type: GrantFiled: January 21, 1993Date of Patent: June 14, 1994Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Kenji Inamasa, Norio Fushimi, Makoto Takagawa
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Patent number: 5300720Abstract: Zeolite L containing caesium is prepared by a process in which said zeolite L is crystallised from a synthesis mixture with a molar composition (expressed as oxides) of:______________________________________ K.sub.2 O/SiO.sub.2 0.15 to 0.40 K.sub.2 O/Cs.sub.2 O 3 to 10 H.sub.2 O/K.sub.2 O 40 to 100 and SiO.sub.2 /Al.sub.2 O.sub.3 7 to 13 ______________________________________and containing 0.5 to 15 ppm (by weight) of divalent metal carbons, e.g. Mg ions. The zeolite L is used in dehydrocyclisation and/or isomerisation processes.Type: GrantFiled: November 30, 1989Date of Patent: April 5, 1994Assignee: Exxon Research & Engineering CompanyInventors: Johannes P. Verduijn, Pieter E. Gellings
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Patent number: 5284987Abstract: A method for the acid catalyzed cyclization of an alkenylbenzene feedstock to a dimethyltetralin in a liquid phase reaction wherein the desired dimethyltetralin is removed from the reaction mixture by distillation simultaneously with the addition of the feedstock to the reaction mixture.Type: GrantFiled: February 5, 1992Date of Patent: February 8, 1994Assignee: Amoco CorporationInventors: David L. Sikkenga, Ian C. Zaenger, Gregory S. Williams
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Patent number: 5276230Abstract: There is disclosed a process for efficiently producing 2,6-dimethylnaphthalene used for the production of polyethylene naphthalate which comprises subjecting 2-methyl-1-(p-tolyl)butene and/or 2-methyl-1-(p-tolyl)butane as a starting raw material to cyclization dehydrogenation reaction by the use of a catalyst comprising a platinum component and at least one component selected from the group consisting of alkali metals and alkaline earth metals each being supported on aluminum oxide. The above process enables the production of the objective compound in a high yield at a low cost by using the catalyst having high safety and stability from the widely available starting material, thereby enhancing the industrial significance of the process.Type: GrantFiled: September 14, 1992Date of Patent: January 4, 1994Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Kenji Inamasa, Norio Fushimi, Makoto Takagawa
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Patent number: 5276227Abstract: Liquid hydrocarbon lubricant viscosity index improver compositions are disclosed having high shear stability. The compositions comprise the homopolymer or copolymer product of the oligomerization of C.sub.3 to C.sub.5 alpha-olefin or mixtures thereof, with or without ethylene as co-monomer. The process is carried out under oligomerization conditions in contact with a reduced valence state Group VIB metal catalyst on porous support. The viscosity index improver of the invention has a regio-irregularity of at least 20%, weight average molecular weight between 6,000 and 30,000 and molecular weight distribution between 2 and 5.Type: GrantFiled: February 3, 1992Date of Patent: January 4, 1994Assignee: Mobil Oil CorporationInventors: Margaret M. Wu, Alice S. Chu
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Patent number: 5237116Abstract: A process and catalyst are disclosed for the catalyzed reaction of an organometallic reagent with a reactive halide in the presence of a diphosphine complex of a nickel carboxylate or sulfonate. The process can be employed in the synthesis of aromatic compounds such as bisbenzocyclobutenes.Type: GrantFiled: April 3, 1991Date of Patent: August 17, 1993Assignee: Shell Oil CompanyInventor: Larry S. Corley
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Patent number: 5157182Abstract: A dehydrocyclization process is described for producing polynuclear organic compounds by contacting a starting organic material having at least one ring moiety comprising at least two adjacent ring carbon atoms each bonded to an independently selected monovalent radical comprising at most about eight carbon atoms provided at least one of the monovalent hydrocarbon radicals comprises more than one carbon atom with a crystalline copper aluminum borate catalyst. The preferred catalyst comprises at least one member selected from the group consisting of (a) crystalline copper aluminum borate and (b) zero valent copper on a support comprising at least one member selected from the group consisting of Al.sub.4 B.sub.2 O.sub.9 and the crystalline copper aluminum borate, the zero valent copper on the support being formed by the reduction of the crystalline copper aluminum borate.Type: GrantFiled: June 19, 1991Date of Patent: October 20, 1992Assignee: Amoco CorporationInventors: Patrick E. McMahon, Larry C. Satek
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Patent number: 5073670Abstract: A method for preparing one or more specific dimethyltetralins from either 5-(o-, m-, or p-tolyl)-pent-1-or -2-ene or 5-phenyl-hex-1- or -2-ene, and optionally for preparing one or more specific dimethylnaphthalenes from the aforesaid dimethyltetralins is disclosed.Type: GrantFiled: July 20, 1990Date of Patent: December 17, 1991Assignee: Amoco CorporationInventors: David L. Sikkenga, Joyce D. Lamb, Ian C. Zaenger, Gregory S. Williams
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Patent number: 5068476Abstract: Liquid olefin oligomers are produced by the oligomerization of C.sub.2 -C.sub.5 alpha olefin alone or with ethylene as a co-monomer. The oligomers having high viscosity index and a structure which is characterized by a regio-irregularity of at least 20 percent, usually from 20 to 40 percent. The olefins are oligomerized with a reduced valence state chromium oxide catalyst on a silica support, usually at a temperature from 90.degree. to 250.degree. C., although lower temperatures can also be used with ethylene as a con-monomer. The liquid oligomerization products can be produced in wide range of viscosities including the direct production of low viscosity lubricants having high viscosity index.Type: GrantFiled: January 29, 1991Date of Patent: November 26, 1991Assignee: Mobil Oil CorporationInventors: Margaret M. Wu, Suzzy C. Ho
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Patent number: 5068479Abstract: A process for preparing 1,1,3,4,4,6-hexamethyl-1,2,3,4-tetrahydronaphthalene of the formula I ##STR1## comprises reacting p-cymene of the formula II ##STR2## with a hexene of the formula IIIa, IIIb and/or IIIc ##STR3## in the presence of a catalytic amount of aluminum halide and a catalytic amount of a triphenylmethyl compound of the formula IV ##STR4## wherein R.sup.1, R.sup.2 and R.sup.3 are each, independently of one another, hydrogen, C.sub.1 -C.sub.4 -alkyl, nitro or halogen and X is hydrogen or halogen.Type: GrantFiled: March 13, 1991Date of Patent: November 26, 1991Assignee: BASF AktiengesellschaftInventors: Michael Huellmann, Herbert Mayr, Rainer Becker
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Patent number: 5068480Abstract: A process for producing 2,6-dimethylnaphthalene, which comprises subjecting 2-methyl-1-(p-tolyl)-butene, 2-methyl-1-(p-tolyl)-butane or a mixture of these to cyclization and dehydrogenation in the presence of a catalyst comprising lead oxide and/or indium oxide and aluminum oxide.Type: GrantFiled: December 3, 1990Date of Patent: November 26, 1991Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Makoto Takagawa, Ken Yamagishi, Jyun Yoshihara, Kenji Inamasa, Kumiko Watabe
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Patent number: 5059572Abstract: A process and catalyst are disclosed for the catalyzed reaction of an organometallic reagent with a reactive halide in the presence of a diphosphine complex of a nickel carboxylate or sulfonate. The process can be employed in the synthesis of aromatic compounds such as bisbenzocyclobutenes.Type: GrantFiled: October 31, 1989Date of Patent: October 22, 1991Assignee: Shell Oil CompanyInventor: Larry S. Corley
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Patent number: 5043501Abstract: A process for producing 2,6-dimethylnaphthalene by alkylation of an alkylaromatic, e.g. toluene, with a C.sub.5 olefin alkylating agent, e.g. 1-pentene, in the presence of a suitable alkylation catalyst, and dehydrocyclization of the resulting alkylate with a dehydrocyclization catalyst to generate a dimethylnaphthalene product rich in the 2,6-isomer. Additional process steps can include isomerization of the product and further alkylation.Type: GrantFiled: March 15, 1990Date of Patent: August 27, 1991Assignee: Mobil Oil Corp.Inventors: Kenneth J. Del Rossi, Larry A. Green, Albin Huss, Jr., Garry W. Kirker, Michael E. Landis