Platinum Or Palladium Patents (Class 502/262)
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Patent number: 4748145Abstract: A catalyst composition comprising a catalytic metal and a support, the support being prepared by depositing a metal alkoxide on a core support, then calcining the support.Type: GrantFiled: February 9, 1987Date of Patent: May 31, 1988Assignee: The Dow Chemical CompanyInventors: Clayton D. Wood, Philip E. Garrou, Edward F. Gleason, III, Iwao Kohatsu
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Patent number: 4720474Abstract: The addition of redox-active metal components and ligands, alternatively or simultaneously, results in increased conversion and selectivity in the palladium-catalyzed oxidation of olefins to carbonyl products in the presence of polyoxoanions. In preferred modes, heteropolyoxoanions and isopolyoxoanions containing tungsten, molybdenum and vanadium, individually or in combination, are described. The use of copper as the redox-active metal component shows reduced allylic reactivity. The elimination of chloride from the catalyst system provides substantial engineering advantages over the prior art, particularly, the reduction of corrosion and chloro-organic by-product formation. The use of redox-active metal components and/or ligands makes the palladium-polyoxoanion catalyst system industrially practicable.Type: GrantFiled: September 24, 1985Date of Patent: January 19, 1988Assignee: Catalytica AssociatesInventors: Janis Vasilevskis, Jacques C. De Deken, Robert J. Saxton, Paul R. Wentrcek, Jere D. Fellmann, Lyubov S. Kipnis
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Patent number: 4714695Abstract: A method for the preparation of a high activity palladium metal based catalyst having the formulaPdTe.sub.a Zn.sub.d E.sub.ewhereE is one or more metals from the group IIA, IVA, VA, IB, VIIB or VIII; anda, d and e are from about 0 to 3, with the proviso that at least d or e.noteq.0.The method comprises the step of forming an aqueous solution of a palladium compound, adding to the solution a powder of a reducing metal more electropositive than palladium and reducing the palladium to its metallic state on the surface of the reducing metal and, separating the resulting catalyst from the solution. Catalysts prepared according to this method are useful for producing esters from aldehydes and alcohols and provide greater conversions to the ester than catalysts prepared by previous processes.Type: GrantFiled: April 16, 1986Date of Patent: December 22, 1987Assignee: The Standard Oil CompanyInventors: Christos Paparizos, Wilfrid G. Shaw, James L. Callahan
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Patent number: 4713363Abstract: Novel supported noble metal catalysts have high metal loadings and dispersions and are particularly effective catalysts in the conversion of 2-chloropropene to methyl methacrylate by vapor phase reaction with methanol and carbon monoxide.Type: GrantFiled: October 10, 1986Date of Patent: December 15, 1987Assignee: The Dow Chemical CompanyInventor: Dennis A. Hucul
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Patent number: 4677095Abstract: A method for stabilizing alumina supports for metal catalysts by impregnating the support with an aqueous dispersion of a high molecular weight, water dispersible polyorganosiloxane and calcining.Type: GrantFiled: January 31, 1985Date of Patent: June 30, 1987Assignee: Engelhard CorporationInventors: Chung-Zong Wan, Joseph C. Dettling
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Patent number: 4642302Abstract: A catalyst composition comprising a catalytic metal and a support, the support being prepared by depositing a metal alkoxide on a core support, then calcining the support.Type: GrantFiled: December 16, 1985Date of Patent: February 10, 1987Assignee: The Dow Chemical CompanyInventors: Clayton D. Wood, Philip E. Garrou, Iwao Kohatsu, Edward F. Gleason
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Patent number: 4624940Abstract: Catalysts having three types of particles dispersed on a monolith have surprising oxidation and three-way activity even after exposure to temperatures above 1000.degree. C. The particle types are: (1) palladium dispersed on stabilized alumina; (2) ceria-containing promoter particles and (3) washcoat stabilization particles.Type: GrantFiled: April 12, 1985Date of Patent: November 25, 1986Assignee: Engelhard CorporationInventors: Chung-Zong Wan, Joseph C. Dettling
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Patent number: 4623635Abstract: A method for the preparation of a high activity palladium metal based catalyst having the formulaPdTe.sub.a Zn.sub.d E.sub.ewhereE is one or more metals from the group IIA, IVA, VA, IB, VIIB or VIII; anda, d and e are from about 0 to 3, with the proviso that at least d or e.noteq.0.The method comprises the step of forming an aqueous solution of a palladium compound, adding to the solution a powder of a reducing metal more electropositive than palladium and reducing the palladium to its metallic state on the surface of the reducing metal and, separating the resulting catalyst from the solution. Catalysts prepared according to this method are useful for producing esters from aldehydes and alcohols and provide greater conversions to the ester than catalysts prepared by previous processes.Type: GrantFiled: April 18, 1985Date of Patent: November 18, 1986Assignee: The Standard Oil CompanyInventors: Christos Paparizos, Wilfrid G. Shaw, James L. Callahan
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Patent number: 4621071Abstract: A composite active phase/support catalyst adapted for the treatment of internal combustion engine exhaust gases, the active phase of which comprising at least one metal from a first group comprising platinum, palladium, iridium, rhodium, ruthenium, rhenium, silver, gold or plurality thereof and at least one additional metal and the support therefor comprising binder/filler admixture, is facilely prepared by (i) intimately admixing the binder and filler support material with at least 50% by weight but less than all of said at least one first group metal, or precursor thereof, and/or of said at least one additional metal, (ii) forming the resulting admixture into catalyst shaped article, (iii) drying and optionally calcining said catalyst shaped article, (iv) incorporating the remainder of said at least one first group metal, or precursor thereof, and/or said at least one additional metal into said catalyst shaped article, and then (v) drying and activating the composite catalyst.Type: GrantFiled: December 7, 1984Date of Patent: November 4, 1986Assignee: Pro-CatalyseInventors: Gilbert Blanchard, Michel Prigent
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Patent number: 4612099Abstract: According to the present invention, there is used a usual reactive ion etching apparatus (as shown in FIG. 1) including a vacuum vessel (1), exhaust means (2), etching gas supply means (4), plasma generating electrodes (6) and high frequency power supply (7). Substance having a catalytic action (8) is inserted in the etching gas supply means (4), by which the present invention is characterized. According to the present invention, a catalyst having an action of dehydrogenation, dehydrohalogenation or dehalogenation dependent on the molecular structure of a halogenized gas to be used, is inserted in the etching gas supply means in the path thereof, thereby to improve the etching speed and the etching selectively without the use of explosive or injurious gases such as hydrogen, chlorine, hydrogen chloride or hydrogen fluoride as additive gases.Type: GrantFiled: July 11, 1984Date of Patent: September 16, 1986Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Masuo Tanno, Yuichiro Yamada
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Patent number: 4608362Abstract: A process and catalyst for the acetoxylation of propylene, said catalyst consisting essentially of palladium, bismuth, potassium, and rubidium.Type: GrantFiled: August 2, 1985Date of Patent: August 26, 1986Assignee: Phillips Petroleum CompanyInventor: Charles A. Drake
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Patent number: 4601996Abstract: An improved nickel-tin hydrogenation catalyst additionally comprising palladium provides a highly active catalyst more easily activated than conventional nickel hydrogenation catalysts, and a process employing the improved catalyst to stabilize lubricating oils to ultraviolet radiation is disclosed.Type: GrantFiled: November 13, 1984Date of Patent: July 22, 1986Assignee: Chevron Research CompanyInventor: Stephen J. Miller
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Patent number: 4587229Abstract: A process and catalyst for the acetoxylation of propylene, said catalyst consisting essentially of palladium, bismuth, and rubidium on a support.Type: GrantFiled: October 22, 1984Date of Patent: May 6, 1986Assignee: Phillips Petroleum CompanyInventors: Charles A. Drake, Stephen E. Reiter
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Patent number: 4581343Abstract: A pollution control catalyst for a catalytic converter in the exhaust system of an internal combustion engine, which catalyst comprises a support impregnated with (i) at least one platinum group precious metal, and with (ii) cerium base metal, or a combination of cerium and at least one other base metal, is facilely prepared by (1) impregnating a catalyst support with precursor compounds of said cerium base metal, or of said cerium base metal and of at least one other base metal, (2) activating said impregnated support, under a neutral or oxidizing atmosphere, at a temperature ranging from 120.degree. to 800.degree. C.Type: GrantFiled: May 15, 1984Date of Patent: April 8, 1986Assignee: Pro-CatalyseInventors: Gilbert Blanchard, Jean-Pierre Brunelle, Richard Doziere, Emmanuel Goldenberg, Michel Prigent
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Patent number: 4565802Abstract: Para-xylene is selectively prepared by reacting toluene and a methylating agent in the presence of a phosphorus modified catalyst comprising a silica polymorph intermixed with an inorganic refractory oxide, said catalyst having an alkali content of less than about 1.3 milliequivalents per gram as available alkali.Type: GrantFiled: December 5, 1983Date of Patent: January 21, 1986Assignee: Union Oil Company of CaliforniaInventor: Dean A. Young
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Patent number: 4537873Abstract: A catalyst comprising precious metal particles supported on a carrier obtained from (a) titania as a first component and (b) as a second component at least one metal oxide selected from oxides of magnesium, strontium, lanthanum, yttrium, cerium, zirconium, silicon and tin, is effective for catalytic combustion of a fuel at a temperature of 400.degree. to 1500.degree. C. with excellent durability.Type: GrantFiled: November 29, 1983Date of Patent: August 27, 1985Assignee: Hitachi, Ltd.Inventors: Akira Kato, Tomoichi Kamo, Shigeo Uno, Hiroshi Kawagoshi, Hisao Yamashita, Shinpei Matsuda
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Patent number: 4532228Abstract: This invention is concerned with the production of catalyst-coated, ceramic honeycomb structures wherein the ceramic contains microcracks and wherein a washcoat is applied to the honeycomb structures prior to the application of the catalyst. The invention contemplates depositing an organic material in the microcracks and, preferably, carbonizing said organic material prior to application of the washcoat, and which is burned out after application of the washcoat.Type: GrantFiled: January 19, 1984Date of Patent: July 30, 1985Assignee: Corning Glass WorksInventors: Carlo M. Golino, Irwin M. Lachman, Lawrence A. Nordlie
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Patent number: 4528279Abstract: A monolithic catalyst, for the purification of exhaust gases from an internal combustion engine, comprising: an inert carrier; a film of alumina and rare earth oxides coated onto the surface of said inert carrier, wherein Ce and La are present in said film at an atomic ratio of Ce/La of 0.05-0.3 and the total content of rare earth oxides in said film is 2-50 wt. %, measured as R.sub.2 O.sub.3, wherein R is an element of the lanthanide series of the Periodic Table; and said film carries a catalyst component containing at least one element of the platinum family.Type: GrantFiled: March 23, 1984Date of Patent: July 9, 1985Assignees: Toyota Jidosha Kogyo Kabushiki Kaisha, Cataler Industrical Co. Ltd.Inventors: Yoshihiro Suzuki, Hiroo Kinoshita, Masayasu Sato, Masanori Ohara
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Patent number: 4521531Abstract: A palladium-on-silica catalyst for the anthraquinone-hydroquinone method of preparing hydrogen peroxide is prepared by adding acid solutions of a palladium compound and of an additive metal salt to an aqueous slurry of silica particles, lowering the pH of the slurry to about 0.8-1.0, then incrementally raising the pH of the slurry to 2.3-2.7, to 3.8-4.2, then to 6.8-7.2, and then reducing the palladium compound to palladium metal.Type: GrantFiled: August 15, 1983Date of Patent: June 4, 1985Assignee: E. I. Du Pont de Nemours and CompanyInventor: John S. Coates
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Patent number: 4518703Abstract: Para-xylene is selectively prepared by reacting toluene and a methylating agent in the presence of a phosphorus modified catalyst comprising a silica polymorph intermixed with an inorganic refractory oxide, said catalyst having an alkali content of less than about 1.3 milliequivalents per gram as available alkali.Type: GrantFiled: December 6, 1982Date of Patent: May 21, 1985Assignee: Union Oil Company of CaliforniaInventor: Dean A. Young
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Patent number: 4497909Abstract: Novel catalyst compositions are provided comprising a silica/alumina carrier having a silica content less than about 40% by weight and at least one noble metal component of Group VIII of the Periodic Table and wherein the catalyst contains (1) pores having a diameter of smaller than 600 .ANG. occupying at least 90% of the total pore volume and (2) pores having a diameter of 150 to 600 .ANG. occupying at least about 40% of the total volume of the pores having a diameter of smaller than 600 .ANG.. This catalyst is particularly useful in the production of jet fuels and white oils.Type: GrantFiled: August 6, 1981Date of Patent: February 5, 1985Assignee: Toa Nenryo Kogyo Kabushiki KaishaInventors: Takuji Itoh, Ikuo Akitsuki
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Patent number: 4492769Abstract: A pollution control catalyst for a catalytic converter within the exhaust system of an internal combustion engine is facilely prepared by (i) coating/impregnating a catalyst support with palladium and at least one base metal catalyst, (ii) activating the step (i) catalyst, (iii) next coating/impregnating the step (ii) activated catalyst with at least one platinum group precious metal other than palladium, or combination of palladium and at least one other platinum group precious metal, and (iv) then activating the step (iii) catalyst.Type: GrantFiled: July 25, 1983Date of Patent: January 8, 1985Assignee: Pro-CatalyseInventors: Gilbert Blanchard, Jean-Pierre Brunelle, Michel Prigent
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Patent number: 4487958Abstract: A process is disclosed for preparing a diester of oxalic acid by contacting carbon monoxide and an ester of nitrous acid in the vapor state under a pressure in the presence of a supported palladium monolith catalyst.Type: GrantFiled: September 30, 1982Date of Patent: December 11, 1984Assignee: Union Carbide CorporationInventors: Bernard C. Ream, Joseph P. Henry, Louis A. Kapicak
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Patent number: 4473705Abstract: A process for producing an oxalate diester is provided. The oxalate diester is produced by reacting an aliphatic alcohol, carbon monoxide and molecular oxygen at an elevated temperature and under pressure in the presence of a catalyst comprising (1) metallic palladium or a palladium compound, (2) a heteropoly-acid and (3) at least one nitrogen compound selected from the group consisting of nitric acid, nitrogen oxides and esters of nitrous acid.Type: GrantFiled: December 21, 1982Date of Patent: September 25, 1984Assignee: Mitsubishi Gas Chemical Company, Inc.Inventors: Hiroshi Miyamori, Tadashi Simomura, Mituo Miura, Katsushige Hayashi
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Patent number: 4468523Abstract: Synthesis of dialkyl oxalates by the oxidative carbonylation of liquid monohydric saturated alcohols of from 1 to 20 carbon atoms with carbon monoxide and oxygen or an oxygen-containing gas in the presence of a catalytic amount of a catalyst comprising palladium or a salt thereof in combination with vanadium in the oxide (V.sub.2 O.sub.5, V.sub.2 O.sub.4, V.sub.2 O.sub.3) form and titanium or a non-hydrolyzable salt thereof, said catalyst being present in a heterogeneous phase.Type: GrantFiled: June 16, 1982Date of Patent: August 28, 1984Assignee: Atlantic Richfield CompanyInventors: John J. Leonard, John A. Sofranko
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Patent number: 4459372Abstract: Surface-metallated aluminas and silicas are species many of whose physical properties, such as surface and pore volume, are unchanged but which exhibit superior hydrothermal stability. Suitable for use as catalytic supports, these materials can be simply prepared by treating the alumina or silica with a tetrahalide of a metal, such as titanium or zirconium, removing the unreacted tetrahalide, and calcining the resulting material in a moist atmosphere.Type: GrantFiled: August 25, 1982Date of Patent: July 10, 1984Assignee: UOP Inc.Inventor: Blaise J. Arena
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Patent number: 4427536Abstract: In a process for cracking a sulfur-containing hydrocarbon an improved oxidation promoter for converting SO.sub.2 to SO.sub.3 comprising an intimate association of palladium and at least one other metal selected from the group comprising platinum, osmium, iridium, rhenium, and rhodium.Type: GrantFiled: August 13, 1982Date of Patent: January 24, 1984Assignee: Chevron Research CompanyInventors: Alan W. Klaassen, Richard D. Bezman