Patents by Inventor Chandra Ratnasamy
Chandra Ratnasamy has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11033877Abstract: Embodiments provided herein are compositions directed to porous iron oxides, which are suitable for removing hydrogen sulfide and other sulfur-containing organic contaminants from hydrocarbon streams, and in which the iron oxide component of the composition contains both maghemite and hematite phases, with maghemite forming the greater portion of these phases. In some embodiments, magnetite, aluminum oxide, alumina silicate, and a binder comprised of an organic substance are homogenized, followed by calcining which burns away the organic and converts magnetite to a mix of maghemite and hematite.Type: GrantFiled: September 12, 2017Date of Patent: June 15, 2021Assignee: Clariant international, LtdInventors: Valéria Perfeito Vicentini, Chandra Ratnasamy, Jeff Braden, Matthew R. Purcell, Marc Kemper Born, Marco Antonio Logli
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Patent number: 10532343Abstract: The present disclosure relates to nickel/aluminum-containing catalyst materials useful, for example, as reforming catalysts, processes for making them, and processes for using them in molten carbonate fuel cells. In one aspect, the disclosure provides a catalyst material including an alumina carrier in an amount in the range of about 5 wt % to about 75 wt %; and a mixed metal oxide in an amount in the range of about 25 wt % to about 95 wt %, the mixed metal oxide including at least about 90 wt % of oxides of nickel and aluminum, the mixed metal oxide having an atomic ratio of nickel to aluminum in the range of about 60:40 to about 90:10, the mixed metal oxide being substantially free of zirconium, in the form of a composite of the alumina carrier and the mixed metal oxide.Type: GrantFiled: May 15, 2017Date of Patent: January 14, 2020Assignee: CLARIANT CORPORATIONInventors: Chandra Ratnasamy, Jon P. Wagner, Yeping Cai, David B. Rogers, Jason E. Spencer, Jeffery L. Braden
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Publication number: 20180071713Abstract: Embodiments provided herein are compositions directed to porous iron oxides, which are suitable for removing hydrogen sulfide and other sulfur-containing organic contaminants from hydrocarbon streams, and in which the iron oxide component of the composition contains both maghemite and hematite phases, with maghemite forming the greater portion of these phases. In some embodiments, magnetite, aluminum oxide, alumina silicate, and a binder comprised of an organic substance are homogenized, followed by calcining which burns away the organic and converts magnetite to a mix of maghemite and hematite.Type: ApplicationFiled: September 12, 2017Publication date: March 15, 2018Inventors: Valéria Perfeito Vicentini, Chandra Ratnasamy, Jeff Braden, Matthew R. Purcell, Marc Kemper Born, Marco Antonio Logli
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Publication number: 20170333875Abstract: The present disclosure relates to nickel/aluminum-containing catalyst materials useful, for example, as reforming catalysts, processes for making them, and processes for using them in molten carbonate fuel cells. In one aspect, the disclosure provides a catalyst material including an alumina carrier in an amount in the range of about 5 wt % to about 75 wt %; and a mixed metal oxide in an amount in the range of about 25 wt % to about 95 wt %, the mixed metal oxide including at least about 90 wt % of oxides of nickel and aluminum, the mixed metal oxide having an atomic ratio of nickel to aluminum in the range of about 60:40 to about 90:10, the mixed metal oxide being substantially free of zirconium, in the form of a composite of the alumina carrier and the mixed metal oxide.Type: ApplicationFiled: May 15, 2017Publication date: November 23, 2017Inventors: Chandra RATNASAMY, Jon P. WAGNER, Yeping CAI, David B. ROGERS, Jason E. SPENCER, Jeffery L. BRADEN
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Patent number: 9327238Abstract: A system for removing CO, H2 and CH4 from an anode waste gas stream from a fuel cell is disclosed. The two catalyst system may comprise a platinum/palladium catalyst and a copper/manganese catalyst. The anode waste stream comes in contact with the platinum/palladium catalyst prior to contacting the copper/manganese catalyst.Type: GrantFiled: November 16, 2011Date of Patent: May 3, 2016Assignee: CLARIANT CORPORATIONInventors: Greg Cullen, Jon P. Wagner, Georg Anfang, Chandra Ratnasamy
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Patent number: 8834835Abstract: A catalytic water gas shift process at temperatures above about 450° C. up to about 900° C. or so wherein the catalyst includes rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.Type: GrantFiled: January 28, 2013Date of Patent: September 16, 2014Assignees: Clariant Corporation, L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges ClaudeInventors: Jon P. Wagner, Michael W. Balakos, Chandra Ratnasamy
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Patent number: 8658321Abstract: A method for producing a substantially desulfurized a hydrocarbon fuel stream at temperatures less than 100° C. The method includes providing a nondesulfurized fuel cell hydrocarbon fuel stream that may include water and passing the fuel stream sequentially through a zeolite Y adsorbent and a selective sulfur adsorbent. The zeolite Y adsorbent may be exchanged with copper ions. The method produces a substantially desulfurized hydrocarbon fuel stream containing less than 50 ppb sulfur.Type: GrantFiled: November 20, 2012Date of Patent: February 25, 2014Assignee: Clariant CorporationInventors: Chandra Ratnasamy, Jon P. Wagner, R. Steve Spivey, Hans-Georg Anfang
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Publication number: 20130134359Abstract: A catalytic water gas shift process at temperatures above about 450° C. up to about 900° C. or so wherein the catalyst includes rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.Type: ApplicationFiled: January 28, 2013Publication date: May 30, 2013Applicants: L'Air Liquide, Societe Anonyme Pour L'Etude Et L'Exploitation Des Procedes Georges Claude, Clariant CorporationInventors: Jon P. Wagner, Michael W. Balakos, Chandra Ratnasamy
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Publication number: 20120128563Abstract: A system for removing CO, H2 and CH4 from an anode waste gas stream from a fuel cell is disclosed. The two catalyst system may comprise a platinum/palladium catalyst and a copper/manganese catalyst. The anode waste stream comes in contact with the platinum/palladium catalyst prior to contacting the copper/manganese catalyst.Type: ApplicationFiled: November 16, 2011Publication date: May 24, 2012Inventors: Greg CULLEN, Jon P. Wagner, Georg Anfang, Chandra Ratnasamy
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Publication number: 20120121500Abstract: A water gas shift catalyst for use at temperatures above about 450° C. up to about 900° C. or so comprising rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.Type: ApplicationFiled: January 26, 2012Publication date: May 17, 2012Applicants: L'AIR LIQUIDE SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE, SUD-CHEMIE INC.Inventors: Jon P. Wagner, Michael W. Balakos, Chandra Ratnasamy
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Patent number: 8119558Abstract: A water gas shift catalyst for use at temperatures above about 450° C. up to about 900° C. or so comprising rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.Type: GrantFiled: March 14, 2008Date of Patent: February 21, 2012Assignees: Süd-Chemie Inc., L'Air Liquide Societe Anonyme pour l'Etude et l'Exploitation des Procedes Georges ClaudeInventors: Jon P. Wagner, Michael W. Balakos, Chandra Ratnasamy
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Patent number: 7964114Abstract: The present development is a catalyst for use in water gas shift processes, a method for making the catalyst and a method of using the catalyst. The catalyst is composed of iron oxide, copper oxide, zinc oxide, alumina, and optionally, potassium oxide, and is produced using a hydrothermal synthesis process. The catalyst demonstrates surprising activity for conversion of carbon monoxide under high to moderate temperature shift reaction conditions.Type: GrantFiled: December 17, 2007Date of Patent: June 21, 2011Assignee: Sud-Chemie Inc.Inventors: Chao Chen, Eshan Li, Yanxia Wang, Yeping Cai, Chandra Ratnasamy, Jeffery E. Riley, Xueqin J. Wang, Shizhong Zhao, Jürgen R. Ladebeck
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Publication number: 20100292076Abstract: A water gas shift catalyst for use at temperatures above about 450° C. up to about 900° C. or so comprising a partially reducible transition metal oxide without an active metal added thereto.Type: ApplicationFiled: September 14, 2009Publication date: November 18, 2010Applicant: SUD-CHEMIE INC.Inventors: Jon P. Wagner, Chandra Ratnasamy, Maxim Lyubovsky, Frank D. Lomax
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Patent number: 7771586Abstract: A strontium-doped, calcium-alumina nickel supported reforming catalyst is useful for reforming reactions when it is desired to generate a low H2/CO ratio synthesis gas and to reduce coking. The catalyst can generate a synthesis gas having a H2/CO ratio of less than about 2.3. The catalyst includes alumina, from about 0.3 wt. % to about 35 wt. % of calcium oxide, from about 0.1 wl % to about 35 wt. % of a strontium promoter, and about 0.5 wt. % to about 30 wt. % nickel. The support is prepared by a method wherein the calcium oxide is combined with the alumina to form aluminum-rich calcium aluminates.Type: GrantFiled: June 11, 2007Date of Patent: August 10, 2010Assignee: Sud-Chemie Inc.Inventors: Chandra Ratnasamy, Yeping Cai, William M. Faris, Jürgen R. Ladebeck
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Publication number: 20090232728Abstract: A water gas shift catalyst for use at temperatures above about 450° C. up to about 900° C. or so comprising rhenium deposited on a support, preferably without a precious metal, wherein the support is prepared from a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and/or an additional dopant selected from Ga, Nd, Pr, W, Ge, Fe, oxides thereof and mixtures thereof.Type: ApplicationFiled: March 14, 2008Publication date: September 17, 2009Applicant: Sud-Chemie Inc.Inventors: Jon P. Wagner, Michael W. Balakos, Chandra Ratnasamy
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Publication number: 20090152500Abstract: The present development is a catalyst for use in water gas shift processes, a method for making the catalyst and a method of using the catalyst. The catalyst is composed of iron oxide, copper oxide, zinc oxide, alumina, and optionally, potassium oxide, and is produced using a hydrothermal synthesis process. The catalyst demonstrates surprising activity for conversion of carbon monoxide under high to moderate temperature shift reaction conditions.Type: ApplicationFiled: December 17, 2007Publication date: June 18, 2009Inventors: Chao Chen, Eshan Li, Yanxia Wang, Yeping Cai, Chandra Ratnasamy, Jeffery E. Riley, Xueqin J. Wang, Shizhong Zhao, Jurgen R. Ladebeck
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Publication number: 20090118119Abstract: A water gas shift catalyst comprising a precious metal deposited on a support, wherein the support is prepared from a mixture comprising a low surface area material, such as an aluminate, particularly a hexaaluminate, and a high surface area material, such as a mixed metal oxide, particularly a mixture of zirconia and ceria, to which may be added one or more of a high surface area transitional alumina, an alkali or alkaline earth metal dopant and an additional dopant selected from Ga, Nd, Pr, W, Ge, Au, Ag, Fe, oxides thereof and mixtures thereof.Type: ApplicationFiled: November 1, 2007Publication date: May 7, 2009Applicant: SUD-CHEMIE INC.Inventors: Chandra Ratnasamy, Jon P. Wagner
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Publication number: 20090108238Abstract: A catalyst for reforming hydrocarbons comprising a precious metal, preferably selected from the group consisting of rhodium, platinum, palladium, osmium, iridium, ruthenium, rhenium, and combinations thereof deposited on a support, wherein the support is produced from a mixture of a low surface area material and a high surface area material.Type: ApplicationFiled: October 31, 2007Publication date: April 30, 2009Applicant: SUD-CHEMIE INC.Inventors: Jon P. Wagner, Chandra Ratnasamy, Charles D. Faulk
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Publication number: 20080260631Abstract: A hydrogen production process includes combining a first feedstream and a second feedstream to produce, in a pre-reforming reactor, a first product stream comprising CH4 and H2O; wherein the first feedstream contains a mixture of H2 and at least one selected from the group consisting of hydrocarbons having two or more carbon atoms and alcohols having two or more carbon atoms, and the mixture has a hydrogen stoichiometric ratio (?) of at least 0.1, and the second feedstream contains steam; feeding the first product stream into a reforming reactor; and reacting the first product stream in the reforming reactor to produce a second product stream containing CO and H2; and a catalyst for use in the process.Type: ApplicationFiled: February 12, 2008Publication date: October 23, 2008Applicant: H2GEN INNOVATIONS, INC.Inventors: Franklin D. Lomax, Maxim Lyubovsky, Rama Zakaria, Jon P. Wagner, Chandra Ratnasamy
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Publication number: 20080032887Abstract: A promoted calcium-alumina supported reforming catalyst that is particularly useful for reforming reactions where low H2/CO ratio synthesis gas, such as less than 2.3 is generated directly is disclosed. The catalyst comprises alumina, from about 0.3 wt % to about 35 wt % calcium oxide, from about 0.1 wt % to about 35 wt % of a strontium promoter, and from about 0.5 wt % to about 30 wt % nickel. The support is prepared by a method wherein the calcium oxide is combined with the alumina to form aluminum-rich calcium aluminates.Type: ApplicationFiled: June 11, 2007Publication date: February 7, 2008Inventors: Chandra Ratnasamy, Yeping Cai, William Faris, Jurgen Ladebeck