Patents Represented by Attorney, Agent or Law Firm Donald T. Black
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Patent number: 8329614Abstract: Solid adsorbents, following their use for mercury removal from flue gas, that do not interfere with the ability of air-entraining additives (such as surfactants) to form stable bubbles when added to fly ash containing the adsorbents. The interference is overcome by heating the materials used in the manufacture of the adsorbent so that magnesium hydroxide and/or one or more alkali compounds containing one or more silicate, aluminate, and/or phosphate moiety, added or already present in the materials, binds multivalent cations present in the materials that could otherwise interfere with the surfactant activity.Type: GrantFiled: May 27, 2010Date of Patent: December 11, 2012Assignee: Praxair Technology, Inc.Inventors: Chien-Chung Chao, David R. Thompson, Jurron Bradley, Steve J. Pontonio
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Patent number: 8328909Abstract: Solid adsorbents, following their use for mercury removal from flue gas, that do not interfere with the ability of air-entraining additives (such as surfactants) to form stable bubbles when added to fly ash containing the adsorbents. The interference is overcome by heating the materials used in the manufacture of the adsorbent so that magnesium hydroxide and/or one or more alkali compounds containing one or more silicate, aluminate, and/or phosphate moiety, added or already present in the materials, binds multivalent cations present in the materials that could otherwise interfere with the surfactant activity.Type: GrantFiled: May 27, 2010Date of Patent: December 11, 2012Assignee: Praxair Technology, Inc.Inventors: Chien-Chung Chao, David R. Thompson, Jurron Bradley, Steve J. Pontonio
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Patent number: 8282715Abstract: Carbon dioxide-containing feed stream such as flue gas is treated to produce a high-purity carbon dioxide stream by a series of steps including removing SOx and NOx with activated carbon, carrying out subambient-temperature processing to produce a product stream and a vent stream, and treating the vent stream by pressure swing adsorption or by physical or chemical absorption to produce a product stream which is recycled to the feed stream.Type: GrantFiled: June 5, 2012Date of Patent: October 9, 2012Assignee: Praxair Technology, Inc.Inventors: Nick Joseph Degenstein, Minish Mahendra Shah, Bernard Thomas Neu
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Patent number: 8235709Abstract: A valve useful in distributing gas received in one inlet to several outlets in a sequence, and burner apparatus including this valve for feeding material in sequence to outlets of a burner thereby forming a non-stationary flame at the burner.Type: GrantFiled: September 20, 2011Date of Patent: August 7, 2012Assignee: Praxair Technology, Inc.Inventors: James Patrick Meagher, Mark Allen Kailburn, William Thoru Kobayashi, Bryan R. Bielec, Friedrich Eduard Purkert
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Patent number: 8216344Abstract: Carbon dioxide-containing feed stream such as flue gas is treated to produce a high-purity carbon dioxide stream by a series of steps including removing SOx and NOx with activated carbon, carrying out subambient-temperature processing to produce a product stream and a vent stream, and treating the vent stream by pressure swing adsorption or by physical or chemical absorption to produce a product stream which is recycled to the feed stream.Type: GrantFiled: September 22, 2009Date of Patent: July 10, 2012Assignee: Praxair Technology, Inc.Inventors: Nick Joseph Degenstein, Minish Mahendra Shah, Bernard Thomas Neu
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Patent number: 8142542Abstract: Offgas containing carbon dioxide and carbon monoxide that is produced in the reduction of ores and other metal oxides in a reactor is treated to reduce its carbon dioxide content and is then contacted with metal oxide to reduce the oxidation state of the metal and oxidize carbon monoxide therein to carbon dioxide, following which the reduced metal is oxidized with steam to produce hydrogen that can be fed to the reactor.Type: GrantFiled: September 22, 2011Date of Patent: March 27, 2012Assignee: Praxair Technology, Inc.Inventors: Raymond Francis Drnevich, Joseph Michael Schwartz, Minish Mahendra Shah, Dante Patrick Bonaquist
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Patent number: 8124561Abstract: A gas mixture preheated to high temperatures using an oxy-fuel, an oxygen-enriched air-fuel or an air-fuel burner is used to devolatilize and partially oxidize carbonaceous feedstock, thereby producing an active residual char that can be used in applications utilizing activated carbon. Use of hot gas and ground carbonaceous feedstock allows the equipment to be minimized, thereby allowing the activated carbon to be produced at or near points of use, for example the production of activated char at or near utility boilers for use in the reduction of mercury emissions from flue gas streams.Type: GrantFiled: March 26, 2010Date of Patent: February 28, 2012Assignee: Praxair Technology, Inc.Inventors: Lawrence E. Bool, III, Chien-Chung Chao, Mark K. Weise, Jurron L. D. Bradley
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Patent number: 8105074Abstract: A stream of hot oxygen is formed by providing a duct and a fuel lance movable axially within the duct, flowing gaseous fuel out of the lance into the duct, mixing it in the duct with gaseous oxidant, flowing the mixture out of the duct into an atmosphere which is hot enough that it ignites the mixture without aid of an ignition source other than said atmosphere, and combusting said mixture in a flame that does not extend into said duct; then moving the lance so its fuel outlet approaches the duct exit orifice so that the base of said flame moves inside said duct to the fuel outlet; and then moving the lance to draw the fuel outlet and the flame attached thereto away from the exit orifice into the duct; and increasing the flow rate of gaseous oxidant in said duct, so that combustion of fuel within the duct heats uncombusted oxygen which emerges as a stream of hot oxidant.Type: GrantFiled: June 24, 2009Date of Patent: January 31, 2012Assignee: Praxair Technology, Inc.Inventors: William John Mahoney, Bryan R. Bielec, Gary Thomas Vardian, Adrian Christian Deneys, Michael Francis Riley, William Eric Slye
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Patent number: 8057734Abstract: Offgas containing carbon dioxide and carbon monoxide that is produced in the reduction of ores and other metal oxides in a reactor is treated to reduce its carbon dioxide content and is then contacted with metal oxide to reduce the oxidation state of the metal and oxidize carbon monoxide therein to carbon dioxide, following which the reduced metal is oxidized with steam to produce hydrogen that can be fed to the reactor.Type: GrantFiled: February 23, 2010Date of Patent: November 15, 2011Assignee: Praxair Technology, Inc.Inventors: Raymond Francis Drnevich, Joseph Michael Schwartz, Minish Mahendra Shah, Dante Patrick Bonaquist
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Patent number: 8056366Abstract: Heat in a stream of combustion products obtained from a glassmelting furnace heated by oxy-fuel combustion is passed to incoming glassmaking materials in a heat exchanger without requiring reduction of the temperature of the stream yet without causing softening of the glassmaking material.Type: GrantFiled: May 10, 2010Date of Patent: November 15, 2011Assignee: Praxair Technology, Inc.Inventors: Hisashi Kobayashi, Kuang Tsai Wu
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Patent number: 8051680Abstract: Heat in a stream of combustion products obtained from a glassmelting furnace heated by oxy-fuel combustion is passed to incoming glassmaking materials in a heat exchanger without requiring reduction of the temperature of the stream yet without causing softening of the glassmaking material.Type: GrantFiled: September 17, 2008Date of Patent: November 8, 2011Assignee: Praxair Technology, Inc.Inventor: Hisashi Kobayashi
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Patent number: 8033295Abstract: A valve useful in distributing gas received in one inlet to several outlets in a sequence, and burner apparatus including this valve for feeding material in sequence to outlets of a burner thereby forming a non-stationary flame at the burner.Type: GrantFiled: February 8, 2008Date of Patent: October 11, 2011Assignee: Praxair Technology, Inc.Inventors: James Patrick Meagher, Mark Allen Kailburn, Willam Thoru Kobayashi, Bryan R Bielec, Friedrich Eduard Purkert
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Patent number: 8017550Abstract: The present invention provides catalytic adsorbents formed from doping activated carbon with a dispersed halide salt. The catalytic adsorbents provided herein are stable and harmless at room temperature, yet allow for chemical adsorption at elevated temperatures typical of those for flue gas streams. The present invention also provides methods of manufacturing the doped activated carbon adsorbents.Type: GrantFiled: September 12, 2005Date of Patent: September 13, 2011Assignee: Praxair Technology, Inc.Inventors: Chien-Chung Chao, Steve J. Pontonio
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Patent number: 7959892Abstract: A hot oxygen stream containing radicals is fed into a gas stream, such as a catalyst regenerator flue gas stream, that contains carbon monoxide to convert carbon monoxide to carbon dioxide.Type: GrantFiled: June 18, 2008Date of Patent: June 14, 2011Assignee: Praxair Technology, Inc.Inventors: Kuang-Tsai Wu, Lee Rosen, David Lenhert, Christopher Leger
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Patent number: 7959708Abstract: A method and apparatus for forming internally shrouded supersonic coherent jets comprising an inert gas, such as pure argon and argon/oxygen mixtures. This method and apparatus can be employed to produce low-carbon steels with a top lance in basic oxygen steelmaking.Type: GrantFiled: December 14, 2007Date of Patent: June 14, 2011Assignee: Praxair Technology, Inc.Inventors: William John Mahoney, Gary Thomas Vardian
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Patent number: 7946129Abstract: Corrosion of the inner surface of the crown of a glassmelting furnace is reduced or avoided by directing at low velocity along that surface a gaseous stream comprising water vapor, or comprising the combustion products of an oxy-fuel burner operated at a stoichiometric ratio of at least 1.0, or the combustion products of a burner operated at a stoichiometric ratio less than 1.0, or by injecting into the furnace interior a gaseous reactant which reacts with alkali species in said space.Type: GrantFiled: November 13, 2007Date of Patent: May 24, 2011Assignee: Praxair Technology, Inc.Inventors: Kuang-Tsai Wu, Hisashi Kobayashi
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Patent number: 7927572Abstract: Carbon dioxide is purified by processes employing NOx-rich sulfuric acid that can be formed by removal of SO2 from the carbon dioxide.Type: GrantFiled: September 22, 2009Date of Patent: April 19, 2011Assignee: Praxair Technology, Inc.Inventors: Nick Joseph Degenstein, Minish Mahendra Shah
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Patent number: 7927573Abstract: Carbon dioxide is purified by processes employing NOx-rich sulfuric acid that can be formed by removal of SO2 from the carbon dioxide.Type: GrantFiled: September 22, 2009Date of Patent: April 19, 2011Assignee: Praxair Technology, Inc.Inventors: Nick Joseph Degenstein, Minish Mahendra Shah, Ravi Kumar
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Patent number: 7896647Abstract: Heating provided by a burner that combusts hydrocarbon fuel can be provided at a sequence of different heat transfer rates by adjusting the total oxygen concentration of oxidant streams fed to the burner. A burner with which the method can be practiced is also disclosed.Type: GrantFiled: May 11, 2009Date of Patent: March 1, 2011Assignee: Praxair Technology, Inc.Inventors: William Thoru Kobayashi, Abilio Tasca, Francisco Dominques Alves De Sousa
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Patent number: 7767007Abstract: Solid adsorbents, following their use for mercury removal from flue gas, that do not interfere with the ability of air-entraining additives (such as surfactants) to form stable bubbles when added to fly ash containing the adsorbents. The interference is overcome by heating the materials used in the manufacture of the adsorbent so that magnesium hydroxide and/or one or more alkali compounds containing one or more silicate, aluminate, and/or phosphate moiety, added or already present in the materials, binds multivalent cations present in the materials that could otherwise interfere with the surfactant activity.Type: GrantFiled: November 27, 2007Date of Patent: August 3, 2010Assignee: Praxair Technology, Inc.Inventors: Chien-Chung Chao, David R. Thompson, Jurron Bradley, Steve J. Pontonio