Patents by Inventor Christian Kuhrs
Christian Kuhrs 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: 8415265Abstract: A process for the preparation of melamine by decomposition of urea with the use of a catalyst, the catalyst comprising a) 10-90% by weight of zeolite, b) 10-90% by weight of a matrix comprising silica, alumina, silicon aluminum oxides and/or clay minerals, and c) 0-10% by weight of additives and the total content of nickel and vanadium in the catalyst being less than 500 ppm.Type: GrantFiled: May 21, 2008Date of Patent: April 9, 2013Assignee: BASF SEInventors: Christian Kuhrs, Andreas Kern, Tilo John, Wolfgang Steiner, Heiko Maas
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Patent number: 7902411Abstract: The present invention relates to a catalyst composition for the oxychlorination of ethylene, comprising a mixture of metal salts on a support, where said metal salts are applied to the support in such ratios that the catalyst composition comprises a) from 3 to 12% by weight of copper as copper salt, b) from 0 to 3% by weight of an alkaline earth metal as alkaline earth metal salt, c) from 0 to 3% by weight of an alkaline metal as alkaline metal salt, d) from 0.001 to 0.1% by weight, preferably from 0.005 to 0.05% by weight, of at least one metal selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum, and/or from 0.0001 to 0.1% by weight, preferably from 0.001 to 0.05% by weight, of gold, as corresponding metal salt or tetrachloroauric acid, where all percentages by weight are based on the total weight of the catalyst including support material.Type: GrantFiled: August 7, 2006Date of Patent: March 8, 2011Assignee: BASF Catalysts LLCInventors: Christian Kuhrs, Ruprecht Meissner
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Publication number: 20100184976Abstract: A process for the preparation of melamine by decomposition of urea with the use of a catalyst, the catalyst comprising a) 10-90% by weight of zeolite, b) 10-90% by weight of a matrix comprising silica, alumina, silicon aluminum oxides and/or clay minerals, and c) 0-10% by weight of additives and the total content of nickel and vanadium in the catalyst being less than 500 ppm.Type: ApplicationFiled: May 21, 2008Publication date: July 22, 2010Applicant: BASF SEInventors: Christian Kuhrs, Andreas Kern, Tilo John, Wolfgang Steiner, Heiko Maas
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Publication number: 20100160667Abstract: Processes comprising: (a) providing a shaped body having a surface and comprising a metal oxide, and impregnating the shaped body with a liquid comprising an unsaturated compound; (b) subjecting the impregnated shaped body to thermolysis under an inert gas atmosphere at a temperature of 250 to 400° C., such that at least 10% by weight of the unsaturated compound is thermalized to form a layer of a high molecular weight polyaromatic on at least a portion of the surface of the shaped body; and (c) reacting the shaped body with a reagent to functionalize the polyaromatic layer, wherein the shaped body has a smallest dimension in any spatial direction of at least 1 mm to provide a shaped catalyst body having ion- exchange properties; shaped catalyst bodies prepared thereby and uses therefor as catalysts.Type: ApplicationFiled: August 7, 2007Publication date: June 24, 2010Applicant: BASF SEInventors: Marco Bosch, Nawid Kashani-Shirazi, Christian Kuhrs
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Patent number: 7560496Abstract: The invention relates to a catalytically active composition for the selective methanation of carbon monoxide which comprises at least one element selected from the group consisting of ruthenium, rhodium, nickel and cobalt as active component and a support material based on carbon. The invention further provides for the use of this catalytically active composition for the selective methanation of carbon monoxide and in the production of hydrogen for fuel cell applications.Type: GrantFiled: January 19, 2006Date of Patent: July 14, 2009Assignee: BASF AktiengesellschaftInventors: Christian Kuhrs, Markus Hoelzle, Till Gerlach, Michael Hesse
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Publication number: 20080139676Abstract: The invention relates to a catalytically active composition for the selective methanation of carbon monoxide which comprises at least one element selected from the group consisting of ruthenium, rhodium, nickel and cobalt as active component and a support material based on carbon. The invention further provides for the use of this catalytically active composition for the selective methanation of carbon monoxide and in the production of hydrogen for fuel cell applications.Type: ApplicationFiled: January 19, 2006Publication date: June 12, 2008Applicant: BASF AktiengesellschaftInventors: Christian Kuhrs, Markus Holzle, Till Gerlach, Michael Hesse
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Patent number: 7253280Abstract: The present invention relates to a process for the catalytic preparation of melamine by decomposition of urea over particular solid catalysts using a main reactor and an after-reactor. A catalyst having a low Lewis acidity is used in the main reactor and a catalyst having an equal or preferably higher Lewis acidity is used in the after-reactor.Type: GrantFiled: January 16, 2004Date of Patent: August 7, 2007Assignee: BASF AktiengesellschaftInventors: Christian Kuhrs, Eckehard Danz, Wolfgang Steiner, Ralf-Thomas Rahn, Thomas Grassler, Reiner Geier, Klaus Harth, Markus Hölzle
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Publication number: 20060270879Abstract: The present invention relates to a catalyst composition for the oxychlorination of ethylene, comprising a mixture of metal salts on a support, where said metal salts are applied to the support in such ratios that the catalyst composition comprises a) from 3 to 12% by weight of copper as copper salt, b) from 0 to 3% by weight of an alkaline earth metal as alkaline earth metal salt, c) from 0 to 3% by weight of an alkaline metal as alkaline metal salt, d) from 0.001 to 0.1% by weight, preferably from 0.005 to 0.05% by weight, of at least one metal selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum, and/or from 0.0001 to 0.1% by weight, preferably from 0.001 to 0.05% by weight, of gold, as corresponding metal salt or tetrachloroauric acid, where all percentages by weight are based on the total weight of the catalyst including support material.Type: ApplicationFiled: August 7, 2006Publication date: November 30, 2006Applicant: BASF AktiengesellschaftInventors: Christian Kuhrs, Ruprecht Meissner
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Patent number: 7126035Abstract: The present invention relates to a catalyst composition for the oxychlorination of ethylene, comprising a mixture of metal salts on a support, where said metal salts are applied to the support in such ratios that the catalyst composition comprises a) from 3 to 12% by weight of copper as copper salt, b) from 0 to 3% by weight of an alkaline earth metal as alkaline earth metal salt, c) from 0 to 3% by weight of an alkaline metal as alkaline metal salt, d) from 0.001 to 0.1% by weight, preferably from 0.005 to 0.05% by weight, of at least one metal selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum, and/or from 0.0001 to 0.1% by weight, preferably from 0.001 to 0.05% by weight, of gold, as corresponding metal salt or tetrachloroauric acid, where all percentages by weight are based on the total weight of the catalyst including support material.Type: GrantFiled: February 4, 2003Date of Patent: October 24, 2006Assignee: BASF AktiengesellschaftInventors: Christian Kuhrs, Ruprecht Meissner
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Publication number: 20060167250Abstract: The present invention relates to a process for the catalytic preparation of melamine by decomposition of urea over particular solid catalysts using a main reactor and an after-reactor. A catalyst having a low Lewis acidity is used in the main reactor and a catalyst having an equal or preferably higher Lewis acidity is used in the after-reactor.Type: ApplicationFiled: January 16, 2004Publication date: July 27, 2006Applicant: BASF AKTIENGESELLSCHAFTInventors: Christian Kuhrs, Eckehard Danz, Wolfgang Steiner, Ralf-Thomas Rahn, Thomas Grabler, Reiner Geter, Klaus Harth, Markus Holzle
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Publication number: 20060140849Abstract: The invention relates to a catalyst for the catalytic oxidation of hydrogen chloride, comprising on a support a) from 0.001 to 30% by weight of gold, b) from 0 to 3% by weight of one or more alkaline earth metals, c) from 0 to 3% by weight of one or more alkali metals, d) from 0 to 10% by weight of one or more rare earth metals, e) from 0 to 10% by weight of one or more further metals selected from the group consisting of ruthenium, palladium, platinum, osmium, iridium, silver, copper and rhenium, in each case based on the total weight of the catalyst.Type: ApplicationFiled: September 25, 2003Publication date: June 29, 2006Inventors: Christian Kuhrs, Christian Walsdorff, Martin Fiene, Eckhard Stroefer, Klaus Harth
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Publication number: 20060099138Abstract: Process for preparing chlorine from hydrochloric acid, which comprises the steps: a) providing a hydrochloric acid feed stream I; b) providing a hydrochloric acid recycle stream II; c) separating off a hydrogen chloride stream IV from the hydrochloric acid feed stream I and the hydrochloric acid recycle stream II in a distillation step; d) feeding the hydrogen chloride stream IV, an oxygen-containing steam V and, if desired, an oxygen-containing recycle stream Va into an oxidation zone and oxidizing hydrogen chloride to chlorine in the presence of a catalyst to give a product gas stream VI comprising chlorine, unreacted oxygen, unreacted hydrogen chloride and water vapor; e) separating off hydrogen chloride and water from the product gas stream VI in an absorption step to give a gas stream VII and the hydrochloric acid recycle stream II; f) if desired, drying the gas stream VII; g) separating off an oxygen-containing stream from the gas stream VII and, if desired, recirculating at least part of this as oxygenType: ApplicationFiled: October 27, 2003Publication date: May 11, 2006Applicant: BASF AktiengesellschaftInventors: Christian Walsdorff, Martin Fiene, Christian Kuhrs, Eckhard Stroefer, Klaus Harth
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Patent number: 6900363Abstract: A process for preparing 1,2-dichloroethane which comprises (A) feeding an ethane-containing feed gas stream into a dehydrogenation zone and dehydrogenating ethane to ethane to give a product gas stream comprising ethane, ethane and secondary constituents, (B) feeding the ethan- and ethene-containing dehydrogenation product gas stream as a single stream or a plurality of substreams, optionally after having separated off secondary constituents, into one or more chlorination zones, chlorinating ethene to 1,2-dichloroethane to give one or more product gas streams comprising 1,2-dichloroethane, ethane and possibly further secondary constituents, isolating 1,2-dichloroethane and one or more ethane-containing circulating gas streams and recirculating the ethane-containing circulating gas stream or streams to the ethane dehydrogenation.Type: GrantFiled: December 4, 2002Date of Patent: May 31, 2005Assignee: BASF AktiengesellschaftInventors: Klaus Harth, Götz-Peter Schindler, Christian Walsdorff, Christian Kuhrs, Falk Simon
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Publication number: 20050020864Abstract: The present invention relates to a catalyst composition for the oxychlorination of ethylene, comprising a mixture of metal salts on a support, where said metal salts are applied to the support in such ratios that the catalyst composition comprises a) from 3 to 12% by weight of copper as copper salt, b) from 0 to 3% by weight of an alkaline earth metal as alkaline earth metal salt, c) from 0 to 3% by weight of an alkaline metal as alkaline metal salt, d) from 0.001 to 0.1% by weight, preferably from 0.005 to 0.05% by weight, of at least one metal selected from the group consisting of ruthenium, rhodium, palladium, osmium, iridium and platinum, and/or from 0.0001 to 0.1% by weight, preferably from 0.001 to 0.05% by weight, of gold, as corresponding metal salt or tetrachloroauric acid, where all percentages by weight are based on the total weight of the catalyst including support material.Type: ApplicationFiled: February 4, 2003Publication date: January 27, 2005Inventors: Christian Kuhrs, Ruprecht Meissner
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Publication number: 20040267063Abstract: A process for preparing 1,2-dichloroethane which comprisesType: ApplicationFiled: June 3, 2004Publication date: December 30, 2004Inventors: Klaus Harth, Gotz-Peter Schindler, Christian Walsdorff, Christian Kuhrs, Falk Simon