Patents by Inventor Jürgen Zühlke
Jürgen Zühlke 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: 11400437Abstract: The present invention is directed to a shaped catalyst body for preparing ethylene oxide, which comprises at least silver, cesium and rhenium applied to an alumina support, wherein the alumina support comprises Si, Ca, and Mg in a defined amount. Furthermore, the present invention is directed to a process for preparing the catalyst according to the present invention and process for preparing ethylene oxide by gas-phase oxidation of ethylene by means of oxygen in the presence of a shaped catalyst body according to the present invention.Type: GrantFiled: August 8, 2017Date of Patent: August 2, 2022Assignee: BASF SEInventors: Andrey Karpov, Michael Kraemer, Marco Bosch, Christian Bartosch, Juergen Zuehlke, Carlos Lizandara Pueyo, Guido Wasserschaff
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Publication number: 20220072524Abstract: A three-dimensional porous catalyst, catalyst carrier or absorbent monolith of stacked strands of catalyst, catalyst carrier or absorbent material, composed of alternating layers of linear spaced-apart parallel strands, wherein the strands in alternating layers are oriented at an angle to one another, wherein the distance between inner spaced-apart parallel strands is larger than the distance between outer spaced-apart parallel strands in at least a part of the layers of the monolith.Type: ApplicationFiled: November 4, 2019Publication date: March 10, 2022Inventors: Christian WALSDORFF, Marco Oskar KENNEMA, Miguel Angel ROMERO VALLE, Florian SCHARF, Dirk HENSEL, Juergen ZUEHLKE, Fred BORNINKHOF, Bart MICHIELSEN, Jasper LEFEVERE
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Publication number: 20210387958Abstract: A process for producing ethylene oxide by gas-phase oxidation of ethylene, comprising: directing a feed comprising gaseous ethylene and gaseous oxygen through a packing of individual shaped catalyst bodies, under conditions conducive to obtain a reaction mixture containing at least 2.7 vol.-% of ethylene oxide, wherein each shaped catalyst body comprises silver deposited on a refractory support and is characterized by a content of at least 20 wt.-% of silver, relative to the total weight of the shaped catalyst body; a BET surface area in the range of 1.6 to 3.0 m2/g; a first face side surface, a second face side surface and a circumferential surface with a plurality of passageways extending from the first face side surface to the second face side surface; and a uniform multilobed cross-section; and a longest direct diffusion pathway d, with 2d being in the range of 0.7 to 2.Type: ApplicationFiled: September 19, 2019Publication date: December 16, 2021Inventors: Andrey KARPOV, Marco Oskar KENNEMA, Nicolas DUYCKAERTS, Christian WALSDORFF, Christian BARTOSCH, Juergen ZUEHLKE, Miguel Angel ROMERO VALLE
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Publication number: 20210379569Abstract: A shaped catalyst body for producing ethylene oxide by gas-phase oxidation of ethylene, comprising silver deposited on a porous refractory support, the shaped catalyst body having a first face side surface, a second face side surface and a circumferential surface, characterized by a content of at least 20 wt.-% of silver, relative to the total weight of the shaped catalyst body; a multilobe structure; a plurality of passageways extending from the first face side surface to the second face side surface, outer passageways being arranged around a central passageway with one outer passageway being assigned to each lobe, wherein neighboring outer passageways are arranged essentially equidistantly to each other and the outer passageways are arranged essentially equidistantly to the central passageway; a minimum wall thickness A between two neighboring passageways in the range of 0.6 to 1.3 mm; a minimum wall thickness B between each outer passageway and the circumferential surface in the range of 1.1 to 1.Type: ApplicationFiled: September 19, 2019Publication date: December 9, 2021Inventors: Andrey KARPOV, Marco Oskar KENNEMA, Nicolas DUYCKAERTS, Christian WALSDORFF, Christian BARTOSCH, Juergen ZUEHLKE, Miguel Angel
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Publication number: 20210283583Abstract: The present invention is directed to a shaped catalyst body for preparing ethylene oxide, which comprises at least silver, cesium and rhenium applied to an alumina support, wherein the alumina support comprises Si, Ca, and Mg in a defined amount. Furthermore, the present invention is directed to a process for preparing the catalyst according to the present invention and process for preparing ethylene oxide by gas-phase oxidation of ethylene by means of oxygen in the presence of a shaped catalyst body according to the present invention.Type: ApplicationFiled: August 8, 2017Publication date: September 16, 2021Inventors: ANDREY KARPOV, Michael KRAEMER, Marco BOSCH, Christian BARTOSCH, Juergen ZUEHLKE, Carlos LIZANDARA PUEYO, Guido WASSERSCHAFF
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Publication number: 20210046459Abstract: The present invention provides a catalyst effective in the oxidative conversion of ethylene to ethylene oxide, comprising an alumina support and 20 to 45%by weight of the catalyst, of silver applied to the support, the catalyst meeting the following limitations (i) to (v): (i) an amount of cesium c(Cs) in mmol per Kg of catalyst of at least 2; (ii) an amount of rhenium c(Re) in mmol per Kg of catalyst of at least 3.0; (iii) an amount of tungsten c(W) in mmol per Kg of catalyst of at least 1.6; (iv) a silicon to alkaline earth metal molar ratio x of not higher than 1.80; (v) c(Cs)?c(Re)?c(W)?4·x?0.5.Type: ApplicationFiled: February 6, 2019Publication date: February 18, 2021Inventors: Andrey KARPOV, Christian WALSDORFF, Michael KRAEMER, Armin LANGE DE OLIVEIRA, Gerhard KRENNRICH, Christian BARTOSCH, Juergen ZUEHLKE
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Publication number: 20210039074Abstract: A method for preparing a silver impregnation solution comprises (a) charging a neutralization reactor R1 with an aqueous organic amine; (b) adding oxalic acid powder through a first feeding conduit to the neutralization reactor R1 to obtain an aqueous oxalic acid-organic amine solution; (c) directing the aqueous oxalic acid-organic amine solution from the neutralization reactor to a complexation reactor R2; (d) adding particulate silver oxide through a second feeding conduit to the complexation reactor R2 to obtain a silver impregnation solution; and, optionally, (e) subjecting the silver impregnation solution to filtration. The silver impregnation solution is used for producing a catalyst effective in the oxidative conversion of ethylene to ethylene oxide. The method allows for the preparation of a silver impregnation solution in an efficient and occupationally and environmentally safe way.Type: ApplicationFiled: February 6, 2019Publication date: February 11, 2021Inventors: Andrey KARPOV, Andreas LEHR, Daniela RIECK, Holger BORCHERT, Tobias WEINLAND, Marco BOSCH, Christian WALSDORFF, Christian BARTOSCH, Juergen ZUEHLKE
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Publication number: 20200398255Abstract: The invention relates to a shaped catalyst body in the form of a tetralobe having four outer through-passages and a ratio of diameter to height of the shaped body of from 0.25 to 1.0 and having a central fifth through-passage. It is used for the oxidation of S02 to S03.Type: ApplicationFiled: February 28, 2019Publication date: December 24, 2020Inventors: Marco Oskar KENNEMA, Gerald NIEFER, Niklas OEFNER, Christian WALSDORFF, Juergen ZUEHLKE, Dirk HENSEL, Miguel Angel ROMERO VALLE, Holger BORCHERT
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Patent number: 10710054Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA) comprising at least four catalyst zones arranged in succession in the reaction tube and filled with catalysts of different chemical composition wherein the active material of the catalysts comprise vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the reactor outlet has an antimony content (calculated as antimony trioxide) between 0.7 to 3.0 wt. %.Type: GrantFiled: January 14, 2016Date of Patent: July 14, 2020Assignee: BASF SEInventors: Diana Carolina Galeano Nunez, Christian Walsdorff, Jürgen Zühlke, Hans-Martin Allmann
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Patent number: 10307741Abstract: The invention relates to shaped catalyst bodies for the oxidation of SO2 to SO3, which comprise vanadium, at least one alkali metal and sulfate on a silicon dioxide support material, wherein the shaped body has the shape of a cylinder having 3 or 4 hollow-cylindrical convexities, obtainable by extrusion of a catalyst precursor composition comprising vanadium, at least one alkali metal and sulfate on a silicon dioxide support material through the opening of an extrusion tool, wherein the opening of the extrusion tool has a cross section formed by 3 or 4 partly overlapping rings whose midpoints lie essentially on a circular line having a diameter of y, wherein the rings are bounded by an outer line lying on a circle having an external diameter x1 and an inner line lying on a circle having an internal diameter x2.Type: GrantFiled: March 16, 2016Date of Patent: June 4, 2019Assignee: BASF SEInventors: Philipp Grüne, Christian Walsdorff, Markus Schubert, Holger Borchert, Jacob Cornelis Van Dorland, Jürgen Zühlke, Stefan Lipp, Michael Krämer
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Publication number: 20180104674Abstract: The invention relates to shaped catalyst bodies for the oxidation of SO2 to SO3, which comprise vanadium, at least one alkali metal and sulfate on a silicon dioxide support material, wherein the shaped body has the shape of a cylinder having 3 or 4 hollow-cylindrical convexities, obtainable by extrusion of a catalyst precursor composition comprising vanadium, at least one alkali metal and sulfate on a silicon dioxide support material through the opening of an extrusion tool, wherein the opening of the extrusion tool has a cross section formed by 3 or 4 partly overlapping rings whose midpoints lie essentially on a circular line having a diameter of y, wherein the rings are bounded by an outer line lying on a circle having an external diameter x1 and an inner line lying on a circle having an internal diameter x2.Type: ApplicationFiled: March 16, 2016Publication date: April 19, 2018Applicant: BASF SEInventors: PHILIPP GRÜNE, Christian WALSDORFF, Markus SCHUBERT, Holger BORCHERT, Jacob Cornelis VAN DORLAND, Jürgen ZÜHLKE, Stefan LIPP, Michael KRÄMER
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Patent number: 9914716Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which has been produced using antimony trioxide consisting predominantly of the senarmontite modification of which all primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide consisting predominantly of the senarmontite modification with a median primary crystallite size of less than 200 nm.Type: GrantFiled: February 17, 2015Date of Patent: March 13, 2018Assignee: BASF SEInventors: Diana C. Galeano Nunez, Christian Walsdorff, Jürgen Zühlke, Hans-Martin Allmann
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Patent number: 9868713Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which have been produced using antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm.Type: GrantFiled: February 17, 2015Date of Patent: January 16, 2018Assignee: BASF SEInventors: Nico F. Fischer, Diana C. Galeano Nunez, Michael Krämer, Markus Schubert, Jürgen Zühlke, Hans-Martin Allmann
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Patent number: 9765046Abstract: The present invention relates to a process for preparing phthalic anhydride by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a thermostatted catalyst and the supply of the at least one aromatic hydrocarbon to the catalyst is temporarily interrupted after putting the catalyst on stream.Type: GrantFiled: June 16, 2014Date of Patent: September 19, 2017Assignee: BASF SEInventors: Nico F. Fischer, Michael Krämer, Jürgen Zühlke, Hans-Martin Allmann
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Patent number: 9714227Abstract: The present invention relates to a catalyst for the epoxidation of alkenes, comprising silver, rhenium, cesium, lithium, tungsten and sulfur on a support. The present invention further relates to a process for producing the catalyst and the use of the catalyst for the oxidation of alkylenes to alkylene oxides. In addition, the present invention relates to a process for preparing ethylene oxide from ethylene, which comprises the oxidation of ethylene with oxygen in the presence of said catalyst.Type: GrantFiled: December 1, 2014Date of Patent: July 25, 2017Inventors: Joseph J. Zakzeski, Marco Bosch, Cornelia Dobner, Christian Bartosch, Jürgen Zühlke
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Patent number: 9656983Abstract: A process for preparing carboxylic acids and/or carboxylic anhydrides by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a catalyst thermostatted by a heat carrier medium, which comprises keeping the temperature of the heat carrier medium constant during the startup of the reactor for at least 24 hours, during which neither the loading of the gas stream with hydrocarbons nor the gas stream volume is increased by more than 3%.Type: GrantFiled: June 16, 2014Date of Patent: May 23, 2017Assignee: BASF SEInventors: Michael Krämer, Nico F. Fischer, Jürgen Zühlke, Hans-Martin Allmann
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Publication number: 20170008866Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which have been produced using antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm.Type: ApplicationFiled: February 17, 2015Publication date: January 12, 2017Inventors: Nico F. FISCHER, Diana C. GALEANO NUNEZ, Michael KRÄMER, Markus SCHUBERT, Jürgen ZÜHLKE, Hans-Martin ALLMANN
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Publication number: 20170008867Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which has been produced using antimony trioxide consisting predominantly of the senarmontite modification of which all primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide consisting predominantly of the senarmontite modification with a median primary crystallite size of less than 200 nm.Type: ApplicationFiled: February 17, 2015Publication date: January 12, 2017Inventors: Diana C. GALEANO NUNEZ, Christian WALSDORFF, Jürgen ZÜHLKE, Hans-Martin ALLMANN
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Publication number: 20160152586Abstract: A process for preparing carboxylic acids and/or carboxylic anhydrides by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a catalyst thermostatted by a heat carrier medium, which comprises keeping the temperature of the heat carrier medium constant during the startup of the reactor for at least 24 hours, during which neither the loading of the gas stream with hydrocarbons nor the gas stream volume is increased by more than 3%.Type: ApplicationFiled: June 16, 2014Publication date: June 2, 2016Applicant: BASF SEInventors: Michael KRÄMER, Nico F. FISCHER, Jürgen ZÜHLKE, Hans-Martin ALLMANN
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Publication number: 20160145226Abstract: The present invention relates to a process for preparing phthalic anhydride by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a thermostatted catalyst and the supply of the at least one aromatic hydrocarbon to the catalyst is temporarily interrupted after putting the catalyst on stream.Type: ApplicationFiled: June 16, 2014Publication date: May 26, 2016Inventors: Nico F. FISCHER, Michael KRÄMER, Jürgen ZÜHLKE, Hans-Martin ALLMANN