Transition Metal Or Compound Thereof Reactant Patents (Class 423/244.06)
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Patent number: 6951635Abstract: Zinc oxide-based sorbents, and processes for preparing and using them are provided, wherein the sorbents are preferably used to remove one or more reduced sulfur species from gas streams. The sorbents contain an active zinc component, optionally in combination with one or more promoter components and/or one or more substantially inert components. The active zinc component is a two phase material, consisting essentially of a zinc oxide (ZnO) phase and a zinc aluminate (ZnAl2O4) phase. Each of the two phases is characterized by a relatively small crystallite size of typically less than about 500 Angstroms. Preferably the sorbents are prepared by converting a precursor mixture, containing a precipitated zinc oxide precursor and a precipitated aluminum oxide precursor, to the two-phase, active zinc oxide containing component.Type: GrantFiled: September 26, 2003Date of Patent: October 4, 2005Assignee: Research Triangle InstituteInventors: Santosh Kumar Gangwal, Brian Scott Turk, Raghubir Prasad Gupta
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Patent number: 6942842Abstract: The present invention provides a process for the preparation of carbon monoxide gas (CO gas) that is free of sulfur compounds to the greatest possible extent and a process to use that gas in chemical syntheses, for example, for the synthesis of phosgene from carbon monoxide and chlorine.Type: GrantFiled: January 12, 2004Date of Patent: September 13, 2005Assignee: Bayer AktiengesellschaftInventors: Werner Breuer, Karl-Heinz Köhler
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Patent number: 6905592Abstract: The invention relates to: a process for the desulphurization of feed streams comprising: supplying a hot process stream to a lead catalyst bed (8) comprising a first sulphur-removing catalyst and a second sulphur-removing catalyst under conditions whereby sulphur is removed from the process stream by the first sulphur-removing catalyst and said second sulphur-removing catalyst does not effectively remove sulphur from the stream at the operating temperature of the lead catalyst bed for the duration of the bed's life; collecting a hot partially sulphur-depleted stream from the lead catalyst bed and cooling said stream; passing said cooled stream through a lag catalyst bed (11) comprising the first sulphur-removing catalyst and the second sulphur-removing catalyst under conditions whereby sulphur is removed from the process stream by the second sulphur-removing catalyst and said first sulphur-removing catalyst removes sulphur less efficiently from the stream at the operating temperature of the lag catalyst bed;Type: GrantFiled: May 30, 2002Date of Patent: June 14, 2005Inventors: Roger Bence, Stephen Caig Littlewood, Philip Henry Donald Eastland
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Patent number: 6887445Abstract: In ridding fluids, including hydrocarbon fluids, both gaseous and liquid, of sulfur compounds including hydrogen sulfide, oxides of sulfur, and thiols, the present invention uses a small quantity of an activator, generally a noble metal oxide, preferably a copper species and/or a manganese species, along with a known oxide product, such as iron oxide, iron hydroxide, zinc oxide, zinc hydroxide, manganese oxide, manganese hydroxide, or combinations thereof, to thoroughly remove sulfur contaminants in a short amount of time. The activator allows for the use of smaller reactor vessels and the production of hydrocarbon fluids substantially free of sulfur products.Type: GrantFiled: March 8, 2002Date of Patent: May 3, 2005Assignee: M-I L.L.C.Inventors: Thomas G. Braga, Delbert C. Scranton, Jr.
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Publication number: 20040202597Abstract: The invention concerns a new method for desulfurization of syngas. The method comprises contacting a sulphur containing syngas having a temperature between 300° C. and 800° C. gas with a sorbent containing metallic iron in order to form a sulphur containing iron compound and a gas substantially free from sulphur or sulphur containing compounds.Type: ApplicationFiled: December 11, 2003Publication date: October 14, 2004Inventors: Rolf Hesbol, Karl-Axel Barkentin, Fredrik Eklund
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Patent number: 6800259Abstract: Methods to control hydrogen sulfide and/or arsine emissions are described. The method involves adding at least one copper compound (such as a copper(II) compound) to the material, such as material containing sulfur in a sufficient amount to control said emissions. The material that is treated with the copper compound(s) is preferably an ore, such as a valve metal containing ore.Type: GrantFiled: March 4, 2002Date of Patent: October 5, 2004Assignee: Cabot CorporationInventor: Robert A. Hard
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Publication number: 20040170549Abstract: Reduced sulfur gas species (e.g., H2S, COS and CS2) are removed from a gas stream by compositions wherein a zinc titanate ingredient is associated with a metal oxide-aluminate phase material in the same particle species. Nonlimiting examples of metal oxides comprising the compositions include magnesium oxide, zinc oxide, calcium oxide, nickel oxide, etc.Type: ApplicationFiled: March 2, 2004Publication date: September 2, 2004Applicants: Research Triangel Institute, INTERCAT, INC.Inventors: Albert A. Vierheilig, Raghubir P. Gupta, Brian S. Turk
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Publication number: 20040120875Abstract: The attrition resistance of sorbent compositions are enhanced by controlling the particle size distribution of the perlite component of the sorbent.Type: ApplicationFiled: December 19, 2002Publication date: June 24, 2004Inventors: Robert W. Morton, Jason J. Gislason, Glenn W. Dodwell
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Patent number: 6743405Abstract: A sorbent material is provided comprising a material reactive with sulfur, a binder unreactive with sulfur and an inert material, wherein the sorbent absorbs the sulfur at temperatures between 30 and 200° C. Sulfur absorption capacity as high as 22 weight percent has been observed with these materials.Type: GrantFiled: May 6, 2002Date of Patent: June 1, 2004Assignee: The United States of America as represented by the United States Department of EnergyInventor: Ranjani Siriwardane
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Patent number: 6726852Abstract: A method of manufacturing a synthesis gas containing hydrogen and carbon monoxide comprises steps of removing only hydrogen sulfide from a natural gas containing hydrogen sulfide and carbon dioxide by permitting the natural gas to pass through a hydrogen sulfide-removing device filled with a hydrogen sulfide absorbent, adding carbon dioxide and steam to the natural gas which the hydrogen sulfide has been removed to prepare a mixed gas, and feeding the mixed gas into a reaction tube of a reformer, thereby permitting mainly a steam reforming reaction to take place in the mixed gas. This method enables hydrogen sulfide in natural gas to be removed while permitting the carbon dioxide of natural gas to be effectively utilized, thereby reducing the quantity of carbon dioxide to be added to the natural gas to be transferred to the reformer.Type: GrantFiled: March 9, 2001Date of Patent: April 27, 2004Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Masaki Iijima, Kazuto Kobayashi, Kazuhiro Morita
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Patent number: 6685898Abstract: A catalytic composition and method of making the same in which a catalytic material has an average pore size distribution sufficiently large to substantially prevent capillary condensation.Type: GrantFiled: May 6, 2003Date of Patent: February 3, 2004Assignee: Engelhard CorporationInventors: Fred M. Allen, Patrick W. Blosser, Ronald M. Heck, Jeffrey B. Hoke, Terence C. Pole, John J. Steger
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Patent number: 6684627Abstract: The present invention is a method of solidifying sulfur component being the cause of “SOx poisoning” by use of a sulfur solidifier. The solidifier includes a metal element having a function of oxidizing the sulfur component and a basic metal element. And the solidifier solidifies sulfur component before exhaust gas flows into an NOx-occluding reduction-type exhaust purifying catalyst located on an exhaust path. Since the foregoing sulfur solidifier includes the above metal element and the basic metal element, it can effectively solidify the sulfur component which are the cause of the SOx poisoning, and ensure improvement in purification performance.Type: GrantFiled: May 21, 2001Date of Patent: February 3, 2004Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tatsuji Mizuno, Shinji Tsuji, Masahiko Takeuchi, Kenji Kato, Takaaki Ito, Yoshitsugu Ogura, Tetsuo Kawamura, Mareo Kimura
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Publication number: 20030203815Abstract: A sorbent composition comprising a promoter metal, zinc oxide, and a high density refractory metal oxide used to more effectively desulfurize a sulfur-containing fluid such as cracked-gasoline or diesel fuel.Type: ApplicationFiled: April 26, 2002Publication date: October 30, 2003Inventors: Gyanesh P. Khare, Glenn W. Dodwell
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Publication number: 20030165416Abstract: Methods to control hydrogen sulfide and/or arsine emissions are described. The method involves adding at least one copper compound (such as a copper(II) compound) to the material, such as material containing sulfur in a sufficient amount to control said emissions. The material that is treated with the copper compound(s) is preferably an ore, such as a valve metal containing ore.Type: ApplicationFiled: March 4, 2002Publication date: September 4, 2003Inventor: Robert A. Hard
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Patent number: 6610264Abstract: A process and system is disclosed for removing sulfur from tail-gas emitted from a Claus sulfur recovery process. First, the tail-gas is oxidized so as to convert sulfur therein to sulfur oxides. Oxidized tail-gas is directed into an absorber where a solid absorbent absorbs substantially all the sulfur oxides thereon. After allowing sufficient time for a desired amount of sulfur oxides to be absorbed, absorption is ceased. Next, the solid absorbent containing the absorbed sulfur oxides is contacted with a reducing gas so as to release an off gas containing hydrogen sulfide and sulfur dioxide. Upon releasing sulfur from the solid absorbent, the solid absorbent is regenerated and redirected into the absorber. Sulfur in the off gas emitted by regeneration is concentrated to an extent sufficient for use within a Claus sulfur recovery process for conversion to elemental sulfur.Type: GrantFiled: May 5, 1995Date of Patent: August 26, 2003Assignee: ExxonMobil Oil CorporationInventors: John Scott Buchanan, Joseph F. Sodomin, III, David L. Stern, Gerald J. Teitman
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Patent number: 6610263Abstract: System for removal of targeted pollutants, such as oxides of sulfur, oxides of nitrogen, mercury compounds and ash, from combustion and other industrial process gases and processes utilizing the system. Oxides of manganese are utilized as the primary sorbent in the system for removal or capture of pollutants. The oxides of manganese are introduced from feeders into reaction zones of the system where they are contacted with a gas from which pollutants are to be removed. With respect to pollutant removal, the sorbent may interact with a pollutant as a catalyst, reactant, adsorbent or absorbent. Removal may occur in single-stage, dual-stage, or multi-stage systems with a variety of different configurations and reaction zones, e.g., bag house, cyclones, fluidized beds, and the like. Process parameters, particularly system differential pressure, are controlled by electronic controls to maintain minimal system differential pressure, and to monitor and adjust pollutant removal efficiencies.Type: GrantFiled: July 31, 2001Date of Patent: August 26, 2003Assignee: EnviroScrub Technologies CorporationInventors: John E. Pahlman, Steve C. Carlton, Ray V. Huff, Charles F. Hammel, Richard M. Boren, Kevin P. Kronbeck, Joshua E. Larson, Patrick A. Tuzinski, Steve G. Axen
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Publication number: 20030157008Abstract: System for removal of targeted pollutants, such as oxides of sulfur, oxides of nitrogen, mercury compounds and ash, from combustion and other industrial process gases and processes utilizing the system. Oxides of manganese are utilized as the primary sorbent in the system for removal or capture of pollutants. The oxides of manganese are introduced from feeders into reaction zones of the system where they are contacted with a gas from which pollutants are to be removed. With respect to pollutant removal, the sorbent may interact with a pollutant as a catalyst, reactant, adsorbent or absorbent. Removal may occur in single-stage, dual-stage, or multi-stage systems with a variety of different configurations and reaction zones, e.g., bag house, cyclones, fluidized beds, and the like. Process parameters, particularly system differential pressure, are controlled by electronic controls to maintain minimal system differential pressure, and to monitor and adjust pollutant removal efficiencies.Type: ApplicationFiled: September 23, 2002Publication date: August 21, 2003Applicant: EnviroScrub Technologies CorporationInventors: John E. Pahlman, Steve C. Carlton, Ray V. Huff, Charles F. Hammel, Richard M. Boren, Kevin P. Kronbeck, Joshua E. Larson, Patrick A. Tuzinski, Steve G. Axen
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Patent number: 6607704Abstract: An integrated lean NOx trap. The integrated lean NOx trap includes a lean NOx trap containing a composite metal oxide mixture consisting essentially of about 80-100 wt % stoichiometric spinel MgAl2O4 and between about 0-20 wt % of CeO2 or CeO2—ZrO2. A method for removing NOx and SOx impurities from exhaust gases using the integrated lean NOx trap is also described.Type: GrantFiled: October 18, 2001Date of Patent: August 19, 2003Assignee: Ford Global Technologies, LLCInventors: Diane L. Guttridge, Jun (John) Li, Mohinder Singh Chattha, Robert J. Kudla, William Lewis Henderson Watkins
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Patent number: 6588205Abstract: An exhaust gas purifying apparatus is provided which includes a three way catalyst provided in an exhaust pipe of an internal combustion engine; and a NOx adsorption/reduction catalyst provided in the exhaust pipe to be located downstream of the three way catalyst. Nickel serving as a catalyst source is loaded on an alumina support layer of the NOx adsorption/reduction catalyst. When the engine operates with a fuel-rich air/fuel mixture at a relatively small air-fuel ratio, a reducing atmosphere is formed around the NOx catalyst, and the reaction to convert NiO into NiS occurs, thereby to consume H2S. As a result, consumption of SO2 proceeds, and the reaction to convert BaSO4 as an oxidized product of sulfur deposited on the NOx catalyst into BaCO3 as an NOx adsorbent is accelerated in an oxidizing atmosphere, thereby resuming the purifying capability of the NOx catalyst.Type: GrantFiled: May 12, 1998Date of Patent: July 8, 2003Assignee: Mitsubishi Jidosha Kogyo Kabushiki KaishaInventors: Shiro Kumagai, Kazuo Koga
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Publication number: 20030113250Abstract: A deactivated sorbent composition is reactivated by contacting the deactivated sorbent with a reducing stream under activation conditions sufficient to reduce the amount of sulfates associated with the sorbent composition.Type: ApplicationFiled: December 19, 2001Publication date: June 19, 2003Inventors: Glenn W. Dodwell, Ronald E. Brown, Robert W. Morton, Jason J. Gislason
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Publication number: 20020182135Abstract: In ridding fluids, including hydrocarbon fluids, both gaseous and liquid, of sulfur compounds including hydrogen sulfide, oxides of sulfur, and thiols, the present invention uses a small quantity of an activator, generally a noble metal oxide, preferably a copper species and/or a manganese species, along with a known oxide product, such as iron oxide, iron hydroxide, zinc oxide, zinc hydroxide, manganese oxide, manganese hydroxide, or combinations thereof, to thoroughly remove sulfur contaminants in a short amount of time. The activator allows for the use of smaller reactor vessels and the production of hydrocarbon fluids substantially free of sulfur products.Type: ApplicationFiled: March 8, 2002Publication date: December 5, 2002Applicant: M-I L.L.C.Inventors: Thomas G. Braga, Delbert C. Scranton
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Publication number: 20020150516Abstract: System for removal of targeted pollutants, such as oxides of sulfur, oxides of nitrogen, mercury compounds and ash, from combustion and other industrial process gases and processes utilizing the system. Oxides of manganese are utilized as the primary sorbent in the system for removal or capture of pollutants. The oxides of manganese are introduced from feeders into reaction zones of the system where they are contacted with a gas from which pollutants are to be removed. With respect to pollutant removal, the sorbent may interact with a pollutant as a catalyst, reactant, adsorbent or absorbent. Removal may occur in single-stage, dual-stage, or multi-stage systems with a variety of different configurations and reaction zones, e.g., bag house, cyclones, fluidized beds, and the like. Process parameters, particularly system differential pressure, are controlled by electronic controls to maintain minimal system differential pressure, and to monitor and adjust pollutant removal efficiencies.Type: ApplicationFiled: January 11, 2002Publication date: October 17, 2002Applicant: EnviroScrub Technologies CorporationInventors: John E. Pahlman, Kathleen S. Pahlman, Steve C. Carlton, Ray V. Huff, Charles F. Hammel, Richard M. Boren, Kevin P. Kronbeck, Joshua E. Larson, Patrick A. Tuzinski, Steve G. Axen
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Patent number: 6428761Abstract: A process for the reduction of gaseous sulfur compounds in gaseous streams. The gaseous stream is contacted with a sorber, e.g., zinc oxide, which is cable of sorbing the sulfur compounds under sulfur sorbing conditions. The sorber is present in the form of one or more layers on the surface of a monolith carrier, e.g., cordierite. The layers of the sorber have a total thickness of at least 3 g/in3 of the carrier. The process is especially useful for the removal of gaseous sulfur compounds such as H2S from gaseous streams.Type: GrantFiled: September 29, 2000Date of Patent: August 6, 2002Assignee: Engelhard CorporationInventors: Lawrence Shore, Robert J. Farrauto
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Publication number: 20020059864Abstract: The invention relates to a process for removing sulfur containing compounds such as H2S and COS from a gas stream, comprising contacting the gas stream with an absorbent in a fluidized bed, which absorbent is based on at least one oxide of a first metal selected from the group consisting of Mn, Fe, Co, Ni, Cu and Zn, in combination with at least one oxide of a second metal selected from the group consisting of Cr, Mo and W on a carrier selected from the group consisting of Al2O3, TiO2, or ZrO2 or mixtures thereof, said absorbent being in the form of particles.Type: ApplicationFiled: October 31, 2001Publication date: May 23, 2002Applicant: N.V. KEMAInventors: Frans Johan Joseph Gerard Janssen, Ronald Meijer
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Publication number: 20020058587Abstract: The present invention relates to a compressed metal oxide composition particle comprised of metal oxide and an organic binder, with the binder preferably being a water insoluble cellulose composition. The present invention also relates to a method for forming a compressed metal oxide composition particle, with the preferred method including compressing a metal oxide and binder mixture to form compressed metal oxide composition particles having a final particle size of between about 0.1 mm and about 200 mm.Type: ApplicationFiled: September 19, 2001Publication date: May 16, 2002Inventors: Delbert C. Scranton, Thomas G. Braga, Alan D. Johnson, Alvin Samuels
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Publication number: 20020058004Abstract: A method of treating exhaust from an internal combustion engine having an emission reduction device, such as a lean NOx trap, such that sulfur dioxide does not pass through the emission reduction device. Exhaust from the engine is directed to a first sulfur trap, which treats the exhaust and discharges exhaust that is substantially free of sulfur. The exhaust from the first sulfur trap is normally directed to the emission reduction device, but is diverted to a second sulfur trap when the first sulfur trap is saturated. During this diversion, a reducing agent introduced upstream of the first sulfur trap aids in purging the first sulfur trap and in reducing exhaust in the first sulfur trap to hydrogen sulfides, which are then treated by the second sulfur trap. When the first sulfur trap is thus purged, the exhaust gas is again directed to the emission reduction device.Type: ApplicationFiled: January 4, 2002Publication date: May 16, 2002Applicant: Southwest Research InstituteInventors: Gordan James J. Bartley, Magdi K. Khair
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Patent number: 6383464Abstract: A method for substantially reducing sulfur-oxide emissions from an asphalt air-blowing process involves adding an emission-reducing additive to the asphalt prior to air-blowing, or early in the air-blowing process, and filtering the flue gases produced in the process. The emission-reducing additive includes at least one metal hydroxide, metal oxide, metal carbonate, or metal bicarbonate, where the metal is sodium, potassium, calcium, magnesium, zinc, copper, or aluminum. The filter is preferably of the fiber-bed type, and removes at least a portion of the sulfur-containing compounds via condensation. The filtered stream of flue gases is subjected to an incineration process before being passed into the atmosphere.Type: GrantFiled: September 30, 1996Date of Patent: May 7, 2002Assignee: Owens Corning Fiberglas Technology, Inc.Inventors: Jorge A. Marzari, Michael R. Franzen, Jay H. Mirrow, David C. Trumbore
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Patent number: 6350422Abstract: A process for removing hydrogen sulfide from a fluid stream by contacting a hydrogen sulfide-containing stream with a sorbent composition wherein said sorbent composition is produced by mixing at least one zinc component which is zinc oxide or a compound convertible to zinc oxide, at least one silica component where the silica component comprises silica or a compound convertible to silica, at least one colloidal metal oxide, and optionally at least one pore generator component so as to form a mixture, extruding the mixture, sphering the resulting extrudate to form spherical particles having a size of form about 0.5 to about 15 millimeters drying the resulting spherical particles, calcining the dried particles, steaming the resulting calcined particles, sulfiding the steamed particles by contacting them with sulfides or sulfur at a temperature of about 200° C. to 1400° C.Type: GrantFiled: May 22, 2000Date of Patent: February 26, 2002Assignee: Phillips Petroleum CompanyInventors: Gyanesh P. Khare, Donald R. Engelbert
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Publication number: 20010048890Abstract: A removal method of malodorous substance and deodorization device thereof enables un-treated gas containing soluble or insoluble malodorous substance contained complexly to be removed by only one treatment process as far as the degree of sensing nothing by organoleptic test. The un-treated gas containing soluble or insoluble malodorous substance contained complexly is flushed in compliance with necessity to remove insoluble malodorous substance, before converting insoluble malodorous substance into soluble substance by virtue of conversion catalyst to flush to be removed.Type: ApplicationFiled: November 6, 1998Publication date: December 6, 2001Inventor: NAOAKI SATA
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Publication number: 20010043897Abstract: In ridding fluids, including hydrocarbon fluids, both gaseous and liquid, of sulfur compounds including hydrogen sulfide, oxides of sulfur, and thiols, the present invention uses a small quantity of an activator, generally a noble metal oxide, preferably a copper species, along with a known oxide product, such as iron oxide or zinc oxide, to thoroughly remove sulfur contaminants in a short amount of time. The activator allows for the use of smaller reactor vessels and the production of hydrocarbon fluids substantially free of sulfur products.Type: ApplicationFiled: June 15, 2001Publication date: November 22, 2001Inventor: Delbert C. Scranton
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Patent number: 6297189Abstract: A highly efficient sulfide catalyst for reducing sulfur dioxide to elemental sulfur, which maximizes the selectivity of elemental sulfur over byproducts and has a high conversion efficiency. Various feed stream contaminants, such as water vapor are well tolerated. Additionally, hydrogen, carbon monoxide, or hydrogen sulfides can be employed as the reducing gases while maintaining high conversion efficiency. This allows a much wider range of uses and higher level of feed stream contaminants than prior art catalysts.Type: GrantFiled: January 14, 1998Date of Patent: October 2, 2001Assignee: The Regents of the University of CaliforniaInventors: Yun Jin, Qiquan Yu, Shih-Ger Chang
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Patent number: 6281164Abstract: The useful life of SOx additives having a SO2→SO3 oxidation catalyst component and a SO3 absorption component can be extended by employing each of these components as separate and distinct physical particles, pellets, etc.Type: GrantFiled: February 2, 2000Date of Patent: August 28, 2001Assignee: Intercat-Savannah, Inc.Inventors: Edward J. Demmel, Albert A. Vierheilig, Regis B. Lippert
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Publication number: 20010016184Abstract: A system for treating the exhaust of an industrial process or combustion source to capture gaseous sulfur compounds which includes contacting the exhaust containing gaseous sulfur compounds with a system of: (1) a structured support coated with for example a monolith (2) a ceramic oxide containing for example TiO2 (3) a precious metal component for example Pt and optionally (4) a modifier such as Cu. The system captures the gaseous sulfur compounds. Gaseous sulfur compounds are then driven off in higher concentrations in a separate isolated lower flow stream in higher concentrations which are easier to process to less noxious or useful sulfur materials, and the catalyst/sorber regenerated. The system also removes carbon dioxide by the oxidation of the carbon monoxide to carbon dioxide.Type: ApplicationFiled: April 4, 2001Publication date: August 23, 2001Applicant: GOAL LINE ENVIRONMENTAL TECHNOLOGIES LLCInventors: Larry E. Campbell, Gregory J. Wagner
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Publication number: 20010014303Abstract: A catalyst system for deodorization and an apparatus for deodorization, each of which comprises a pretreating catalyst and a noble metal catalyst, the pretreating catalyst converting a sulfur atom of low oxidation state which deactivates the noble metal catalyst into a sulfur atom of high oxidation state which has little deactivation effects there on, the noble metal catalyst oxidizing aldehyde, etc., wherein a material to be deodorized is brought into contact with the pretreating catalyst prior to being brought into contact with the noble metal catalyst. As the pretreating catalyst, a catalyst comprising at least one selected from the group consisting of vanadium, chromium, manganese, iron, cobalt, nickel, copper and oxides thereof is used, while as the noble metal catalyst, a catalyst comprising at least one selected from the group consisting of ruthenium, rhodium, palladium, silver, rhenium, osmium, iridium, platinum and gold is used.Type: ApplicationFiled: April 13, 2001Publication date: August 16, 2001Inventor: Naoaki Sata
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Patent number: 6251348Abstract: A process is provided for removing sulfur compounds, such as hydrogen sulfide, sulfur oxides and thiols, out of fluids, such as natural gas or natural gas liquids, by contacting the fluid with a physical mixture of iron oxide, zinc oxide or mixtures thereof and an activator, such as platinum oxide, gold oxide, silver oxide, copper oxide, copper metal, copper carbonate, copper alloy, cadmium oxide, nickel oxide, palladium oxide, lead oxide, mercury oxide, tin oxide and cobalt oxide, preferably copper oxide wherein the activator is present in an amount equal to 0.125% by wt. to 5% by wt. of the total physical mixture. The contacting is conducted at a temperature of 300° C. or less.Type: GrantFiled: August 4, 1998Date of Patent: June 26, 2001Assignee: The SulfaTreat CompanyInventor: Delbert C. Scranton, Jr.
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Patent number: 6224840Abstract: The present invention relates to a &ggr;-Al2O3 sorbent impregnated with alkali salt and CuO, which has a superior SO2 sorption capacity and a high regeneration conversion rate. A &ggr;-Al2O3 sorbent of the present invention is impregnated with alkali salt and copper oxide, whose alkali salt and copper oxide(CuO) contents are 1 to 10 wt. % and 5 to 20 wt. % against 100 wt. % &ggr;-Al2O3 carrier, respectively. The &ggr;-Al2O3 sorbent of the invention has a superior SO2 sorption capacity and a high regeneration conversion rate, which facilitates efficient removal of SO2 by the conventional dry method.Type: GrantFiled: February 29, 2000Date of Patent: May 1, 2001Assignee: Korea Advanced Institute of Science and TechnologyInventors: Sang-Done Kim, Sang-Mun Jeong, Kyung-Seun Yoo
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Patent number: 6221277Abstract: The present invention relates to an activated metal oxide and methods for removing sulfur compounds from fluids, whereby the activated metal oxide includes an amount of metal oxide and an amount of ethoxylated fatty amine, with the ethoxylated fatty amine increasing the rate of reactivity between the metal oxide and the sulfur compounds, which include hydrogen sulfide, carbonyl sulfide, mercaptans, and other organic sulfides. The ethoxylated tallow amines include ethoxylated tallow amine, ethoxylated cocoa amine, ethoxylated oleic amine, ethoxylated soya amine, ethoxylated palmatic amine, ethoxylated steric amine, and combinations thereof. The method involves activating the metal oxide, preferably iron oxide or zinc oxide, with an amount of ethoxylated fatty amine so that when fluids, such as water or liquid hydrocarbons, contact the metal oxide the sulfur compounds are removed.Type: GrantFiled: February 17, 1998Date of Patent: April 24, 2001Assignee: The SulfaTreat CompanyInventor: Delbert C. Scranton, Jr.