Platinum Group (i.e., Ru, Rh, Pd, Os, Ir, Pt) Patents (Class 502/223)
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Patent number: 4985389Abstract: Disclosed herein is a process for removing contaminating mercury from hydrocarbon streams, gas or liquid, wherein the stream is contacted with a molecular sieve pretreated with an alkali polysulfide. The pretreatment consists of saturating the sieve with an aqueous solution of the polysulfide and subsequently drying the saturated sieve under conditions calculated to dry but not decompose the polysulfide present.Type: GrantFiled: October 30, 1989Date of Patent: January 15, 1991Assignee: Mobil Oil CorporationInventor: Costandi A. Audeh
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Patent number: 4983558Abstract: The invention relates to a process for treating a new or regenerated catalyst containing a support having as a base at least one metal or metalloid oxide and at least one active metal, comprising treating the catalyst with at least one sulfuration agent dissolved in a solvent.The invention is charcterized in that the sulfuration agent is a polysulfide with the following general formulaR'--S.sub.y --R--S.sub.x --R--S.sub.y).sub.n R'where R is a linear or a branched organic radical comprising from 2 to 12 carbon atoms; R' is an alkyl, alkenyl, arylalkyl or arylalkenyl radical comprising from 1 to 12 carbon atoms, R' possibly comprising at least one heteroatom selected from the group consisting of oxygen, nitrogen, and sulfur; x has a value of from 1 to 4; y has a value of from 1 to 8 and n is such that the average molar mass of the polymer is about 5000.Type: GrantFiled: February 16, 1989Date of Patent: January 8, 1991Assignee: Institut Francais du PetroleInventors: Maurice Born, Guy Parc, Herve Toulhoat
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Patent number: 4983559Abstract: Presulfurization of a catalyst used, e.g., for hydrocarbon conversion, wherein a polysulfide is employed as the sulfurization agent. In the first stage of the presulfurization, phosphorous, a halogen, or compounds thereof are introduced.Type: GrantFiled: July 3, 1989Date of Patent: January 8, 1991Assignee: Europeene de Retraitement de Catalyseurs EurecatInventor: Georges Berrebi
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Patent number: 4950386Abstract: It has now been discovered that hydrocarbon feeds containing a polycyclic aromatic compound or mixtures thereof can be selectively hydrogenated by contacting the feed with a transition metal catalyst and hydrogen in the presence of an acid to provide a hydrocarbon mixture in which the aromatic content consists substantially of mono- and di-aromatic compounds. Useful acids include Lewis acids and acids having a pKa in the range of 0 to about -10.Type: GrantFiled: August 15, 1988Date of Patent: August 21, 1990Assignee: Exxon Research and Engineering CompanyInventor: Manuel A. Francisco
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Patent number: 4818353Abstract: A transition metal electrocatalyst surface (e.g. a porous surface of finely divided Group VIII or Group I-B metal with an attached current collector) is modified by a sulfur treatment, using an oxidized sulfur species of average sulfur oxidation state of about 4 or less, e.g. SO.sub.2 dissolved in aqueous acid. Treatment of the transition metal with SO.sub.2 or the like typically provides up to 100% coverage of the surface electrocatalyst sites with chemisorbed sulfur-containing species and perhaps subsurface effects as well, but washing or other non-electrochemical techniques can remove 5-90% (e.g. 25-70%) of the chemisorbed SO.sub.2 or the like from the surface, leaving substantially only a very strongly bound form of the sulfur-containing species. The strongly bound sulfur-containing species can then be reduced to form a highly beneficial, selectively-improving pattern of sites containing reduced -S (e.g. sulfur or sulfide) on the electrocatalyst surface.Type: GrantFiled: July 7, 1987Date of Patent: April 4, 1989Inventors: Stanley H. Langer, Michael J. Foral, John C. Card
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Patent number: 4814152Abstract: A process and composition for removing elemental mercury vapor from a gas such as natural gas is disclosed. The mercury-containing gas is contacted with a solid support such as carbon containing elemental sulfur and at least one metal which catalyzes the reaction: 2 Hg+S.sub.2 .revreaction.2 HgS.Type: GrantFiled: October 13, 1987Date of Patent: March 21, 1989Assignee: Mobil Oil CorporationInventor: Tsoung Y. Yan
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Patent number: 4814444Abstract: Certain 2-quinoxalinol-4-oxides are selectively reduced to form 2-quinoxalinols employing hydrogen as a reducing agent by reacting such 2-quinoxalinol-4-oxides with a catalyst selected from the group consisting of sulfided platinum, sulfided palladium, sulfided rhodium and sulfided ruthenium.Type: GrantFiled: June 19, 1987Date of Patent: March 21, 1989Assignee: Uniroyal Chemical Company, Inc.Inventors: Russell E. Malz, Jr., John W. Sargent, Joseph A. Feiccabrino
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Patent number: 4795732Abstract: Alkanes are dehydrogenated to alkenes, for example n-butane to n-butenes by contact with a catalyst comprising a silicalite and a platinum group metal the catalyst being substantially free of alkali and alkaline earth metals. The selectivity of the product to butenes is improved by either presulphiding the catalyst or by passing a minor amount of a sulphur-containing compound with the alkane feed.The catalyst can be prepared by either forming the silicalite in the presence of the platinum group metal or alternatively contacting preformed silicalite with a solution of a platinum group metal.Type: GrantFiled: December 19, 1986Date of Patent: January 3, 1989Assignee: The British Petroleum Company p.l.c.Inventor: Sami A. I. Barri
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Patent number: 4737482Abstract: An improved process is provided for forming ketones from the corresponding olefins by vapor phase oxidiation of the olefin in the presence of molecular oxygen and water vapor employing a heterogeneous catalyst comprising rhenium compounds and complexes, optionally containing at least one metal compound or complex selected from the group consisting of Group VIB metals and Group VIII noble metals, and mixtures thereof. It has been surprisingly found that these catalysts effect the formation of ketones in high selectivities with minimal selectivities to the undesirable carbon dioxide and carbon monoxide by-products.Type: GrantFiled: September 16, 1985Date of Patent: April 12, 1988Assignee: Exxon Research & Engineering Co.Inventors: Chuen Y. Yeh, Charles Savini
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Patent number: 4731467Abstract: Process for the preparation of diesters of 2-butenedioic acids by reacting an optionally substituted acetylenically unsaturated hydrocarbon having two carbon atoms less than said 2-butenedioic acid, carbon monoxide, a quinone in the presence of a of Group VIII noble metal or a compound thereof, and optionally, a redox agent.Type: GrantFiled: January 12, 1987Date of Patent: March 15, 1988Assignee: Shell Oil CompanyInventors: Eit Drent, Antonius J. M. Breed
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Patent number: 4727185Abstract: When a 4-halogenoorthophthalic acid salt is dissolved together with a base in an alkaline aqueous solution and the solution is heated in the presence of a catalyst comprising a noble metal supported on a carrier, a formic acid salt and a small amount of an aliphatic compound containing a hydroxyl group, a 3,3',4,4'-biphenyltetracarboxylic acid salt is obtained in a high yield.Type: GrantFiled: January 21, 1986Date of Patent: February 23, 1988Assignee: Hitachi, Ltd.Inventors: Fusaji Shoji, Fumio Kataoka
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Patent number: 4719195Abstract: The invention concerns a process for sulfurizing a catalyst, particularly a refining catalyst comprising a carrier and active metal oxides.In a first step, a sulfur compound mainly consisting of organic polysulfide is introduced into the catalyst mass. A second step consists of first sulfurizing, in the absence of hydrogen, the active metal oxides at a temperature lower than 275.degree. C. and then activating the catalyst at a temperature higher than 275.degree. C.The present invention concerns a process for presulfurizing a hydrocarbon treatment catalyst and/or preconditioning a catalyst in view of subsequent presulfurization.Type: GrantFiled: October 30, 1985Date of Patent: January 12, 1988Assignee: Europeenne de Retraitement de Catalyseurs (Eurecat)Inventors: Herve Toulhoat, Georges Berrebi
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Patent number: 4677094Abstract: A novel trimetallic catalytic composite, a method of manufacture and process use thereof is disclosed. The composite comprises a refractory support having a nominal diameter of at least 650 microns and having deposited thereon a uniformly dispersed platinum component, a uniformly dispersed tin component and a surface-impregnated metal component selected from the group consisting of rhodium, ruthenium, cobalt, nickel, iridium and mixtures thereof. When this catalytic composite is used in the reforming of hydrocarbons at low pressures significant improvements in activity stability is observed compared to catalysts of the prior art.Type: GrantFiled: September 22, 1986Date of Patent: June 30, 1987Assignee: UOP Inc.Inventors: Mark D. Moser, Randy J. Lawson
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Patent number: 4677093Abstract: The invention relates to a hydrodemetallization process and catalyst, of a sulfur and organometallic containing hydrocarbon feedstock which consists in contacting the feedstock under the usual hydrotreating conditions with a catalyst comprising a refractory mineral carrier composed essentially of a mesoporous alumina with defined characteristics, said catalyst having previously been sulfurized. The process is characterized in that the catalyst contains, in addition to the carrier, in free or combined form, from 0.01 to 0.7 weight percent, based on the total weight of the catalyst, and calculated as if in elemental form, of at least one metal selected from groups Vb, VIb, VIIb and VIII of the periodic table of the elements, so as to give optimum initial demetallizing activity.Type: GrantFiled: August 29, 1986Date of Patent: June 30, 1987Assignee: Compagnie Francaise de RaffinageInventors: Jacques Devanneaux, Jean-Paul Gallez, Laurent Mariette
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Patent number: 4642374Abstract: A process for the preparation of an ester of dicarboxylic acid from an alkene, carbon monoxide. The process is catalyzed by a catalyst which comprises a platinum group metal, for example palladium, and a copper compound. To avoid catalyst deactivation the process is carried out in the presence of a dihydrocarbyl peroxide which is reduced to a hydrocarbyl alcohol under the process conditions. The process can be used, for example, to prepare succinate esters from ethylene, carbon monoxide, an alcohol and a dihydrocarbyl peroxide such as di-tertiary butyl peroxide.Type: GrantFiled: December 17, 1985Date of Patent: February 10, 1987Assignee: The British Petroleum Company p.l.c.Inventors: Andrew R. Lucy, George E. Morris
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Patent number: 4606798Abstract: A solar reaction system which produces hydrogen by reduction of hydronium ions using methylviologen or a related compound as an electron-transfer agent and a platinum electron-transfer catalyst, wherein the catalyst is modified with a water-soluble divalent sulphur compound, or a sulphur compound in which the sulphur is reducible to the divalent state, in an amount sufficient to inhibit hydrogenation side-reactions during the solar reduction process but not sufficient to significantly suppress the reduction of hydronium ion to hydrogen by the electron-transfer agent.Type: GrantFiled: April 23, 1985Date of Patent: August 19, 1986Assignee: The Commonwealth of Australia Commonwealth Scientific and Industrial Research OrganizationInventors: Wolfgang H. F. Sasse, Oddvar Johansen, Albert W. Mau, Jean D. Swift
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Patent number: 4594334Abstract: A novel catalytic composite for the conversion of hydrocarbons is disclosed. The catalytic composite comprises a refractory inorganic oxide, a first uniform dispersion of a platinum component and a rhenium component, and a second dispersion of an indium component thereover. The composite further comprises a halogen component and a sulfur component. In addition to a novel catalytic composite there is also disclosed a method of preparing the composite and a novel process for the use of the composite.Type: GrantFiled: February 19, 1985Date of Patent: June 10, 1986Assignee: UOP Inc.Inventors: George J. Antos, Li Wang
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Patent number: 4590309Abstract: A process for preparing perfluoroalkanols by hydrogenation of the corresponding aliphatic perfluoroacids. An acid of the formula:C.sub.n F.sub.2n+1 COOHin which n is greater than or equal to 1, is reacted with hydrogen, in the presence of a catalyst based on ruthenium, rhodium, iridium or platinum, under a total pressure of between 1 and 50 bar and in the presence of at least one additive chosen from the group comprising the halide anions and the metal cations of columns IB, IIB, IVA, VA and VB of the periodic table of the elements.Type: GrantFiled: April 30, 1985Date of Patent: May 20, 1986Assignee: Rhone-Poulenc Specialites ChimiquesInventor: Georges Cordier
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Patent number: 4539307Abstract: A metal catalyst preferably comprised of a platinum/rhenium metal combination, supported on alumina is activated for the reforming of hydrocarbon feedstock, by being contacted with an oxygen-containing gas at a temperature sufficient to oxidize the metal catalyst and then being reduced sequentially by contacting the catalyst with a stream of hydrogen at about 650.degree. to about 750.degree. F. for a first period of time and then at about 900.degree. to about 1000.degree. F. for a second period of time, followed by sulfiding of the sequentially reduced catalyst. The sequential reduction procedure increases the selectivity of the reforming catalyst and results in increased C.sub.5.sup.+ liquid product yields.Type: GrantFiled: March 12, 1984Date of Patent: September 3, 1985Assignee: Engelhard CorporationInventor: Soni O. Oyekan
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Patent number: 4530917Abstract: Catalysts for the treatment of hydrocarbons are presulfurized or presulfided ex-situ, in the absence of hydrogen, by means of a polysulfide of the general formula R--S.sub.(n) --R' wherein n is an interger from 3 to 20 and R and R' are each an organic radical having from 1 to 150 carbon atoms, R' being optionally a hydrogen atom, the so-presulfurized or presulfided catalysts being subsequently activated with hydrogen during their use in the hydrotreatment process of a hydrocarbon charge, i.e. in-situ. An aldehyde or an alcohol or a ketone, an ether or an organic acid, may be added, as promoter, to the polysulfide.Type: GrantFiled: January 31, 1984Date of Patent: July 23, 1985Assignee: Eurecat - Societe Europeenne de Retraitement de CatalyseursInventor: Georges Berrebi
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Patent number: 4522935Abstract: A new catalyst for converting hydrocarbons, especially for reforming hydrocarbons, is disclosed. Also disclosed is a hydrocarbon conversion process using the catalyst as well as a method for making the catalyst. The catalyst comprises a platinum group component, a tin component, an indium component and a halogen component with a porous support material, wherein the atomic ratio of indium to platinum group component is more than about 1.14. In a preferred embodiment of the invention the catalyst is utilized in the catalytic reforming of hydrocarbons boiling in the gasoline range to produce a high octane reformate suitable for gasoline blending or a high aromatics content reformate suitable for use as a petrochemical feedstock.Type: GrantFiled: October 7, 1983Date of Patent: June 11, 1985Assignee: UOP Inc.Inventors: Delmar W. Robinson, Russell W. Johnson, Mark D. Moser
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Patent number: 4520129Abstract: The reduction of organic compounds is made more selective by modifying the reduction catalysts with compounds of sulfur.Type: GrantFiled: May 20, 1983Date of Patent: May 28, 1985Inventor: Timothy P. Murtha
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Patent number: 4506032Abstract: This invention relates to a new catalyst for converting hydrocarbons. The catalyst comprises a platinum group component, a Group IVA component, especially tin, an alkali or alkaline earth component, more than 0.2 weight %, calculated on an elemental basis, of a halogen component and a porous carrier material, wherein the atomic ratio of the alkali or alkaline earth component to the platinum group component is more than 10. The catalyst is particularly useful for dehydrogenating paraffins having from 2 to 5 or more carbon atoms to the corresponding mono-olefins, or for dehydrogenating mono-olefins having from 3 to 5 or more carbon atoms to the corresponding di-olefins.Type: GrantFiled: October 14, 1983Date of Patent: March 19, 1985Assignee: UOP Inc.Inventors: Tamotsu Imai, Chi-Wen Hung
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Patent number: 4504599Abstract: Antimony-containing metal oxide catalysts are produced or activated by dry blending (a) a catalyst or catalyst precursor composed of an antimony-containing metal oxides composition containing antimony and at least one element selected from the group consisting of iron, cobalt, nickel, manganese, cerium, uranium, tin, titanium, and copper, and (b) elemental antimony or an antimony compound, and contacting the components (a) and (b) with each other at about 300.degree. C. to about 1000.degree. C. in a non-reducing gas atmosphere for a period sufficient for the elemental antimony or antimony compound (b) to deposit on the catalyst or catalyst precursor (a).Type: GrantFiled: November 14, 1983Date of Patent: March 12, 1985Assignee: Nitto Chemical Industry Co., Ltd.Inventors: Yutaka Sasaki, Yoshimi Nakamura
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Patent number: 4487848Abstract: A new catalyst for converting hydrocarbons, especially for reforming hydrocarbons, is disclosed. Also disclosed is a hydrocarbon conversion process using the catalyst as well as a method for making the catalyst. The catalyst comprises a platinum group component, a tin component, an indium component and a halogen component with a porous support material, wherein there is about 0.6 or more wt. %, on an elemental basis, indium present. In a preferred embodiment of the invention the catalyst is utilized in the catalytic reforming of hydrocarbons boiling in the gasoline range to produce a high octane reformate suitable for gasoline blending or a high aromatics content reformate suitable for use as a petrochemical feedstock.Type: GrantFiled: June 2, 1983Date of Patent: December 11, 1984Assignee: UOP Inc.Inventors: Delmar W. Robinson, Russell W. Johnson, Mark D. Moser
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Patent number: 4486547Abstract: A new catalyst composition comprising a platinum group component, a tin component, an indium component, an alkali or alkaline earth component and a porous support material wherein the atomic ratio of indium to platinum group component is more than 1.0 is disclosed. The catalyst is particularly useful for dehydrogenating hydrocarbons. In one embodiment of the invention, detergent range normal paraffins (C.sub.10 -C.sub.15 or higher) are dehydrogenated to the corresponding normal olefins in the presence of the subject catalyst and hydrogen.Type: GrantFiled: June 2, 1983Date of Patent: December 4, 1984Assignee: UOP Inc.Inventors: Tamotsu Imai, Chi-wen Hung
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Patent number: 4484992Abstract: A process is described for the selective production of hydrogen by means of heterogeneous photoredox catalysis, in which mixtures of water and alkali metal sulfites or sulfides, alkaline earth metal sulfites or sulfides or ammonium sulfites or sulfides are reacted under the action of light in a suspension of a cadmium sulfide, cadmium sulfoselenide or titanium dioxide/semiconductor powder which is at least partially coated with Cu, Cr, Ni, Co or a noble metal or mixtures thereof. The catalysts which can be employed in this process (coated semiconductor powders) are in some cases novel.Type: GrantFiled: January 25, 1982Date of Patent: November 27, 1984Assignee: Ciba-Geigy CorporationInventors: Niklaus Buhler, Jean F. Reber, Kurt Meier, Milos Rusek
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Patent number: 4474896Abstract: Adsorbent compositions and their preparation are disclosed for the adsorption of elemental mercury.Type: GrantFiled: March 31, 1983Date of Patent: October 2, 1984Assignee: Union Carbide CorporationInventor: Chien C. Chao
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Patent number: 4410569Abstract: Preparation of palladium (II) bis(hexafluoracetylacetonate) and adducts derived therefrom are disclosed, said adducts having the formulaPd(F.sub.6 ACAC).sub.2.L.sub.nwherein L is a Lewis base selected from certain classes, and n is an integer from 1 to 4. These compounds are useful in preparing catalytic and primer surfaces of elemental palladium.Type: GrantFiled: February 23, 1982Date of Patent: October 18, 1983Assignee: Minnesota Mining and Manufacturing CompanyInventor: Allen R. Siedle