Patents by Inventor Peter Zehner
Peter Zehner 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: 11884611Abstract: A reactor for performing a gas/liquid biphasic high-pressure reaction with a foaming medium, comprising an interior formed by a cylindrical, vertically oriented elongate shell, a bottom and a cap, wherein the interior is divided by internals into a backmixed zone and a zone of limited backmixing, wherein the backmixed zone and the zone of limited backmixing are consecutively traversable by the reaction mixture, wherein the backmixed zone comprises means for introducing gas and liquid and a gas outlet and also comprises at least one mixing apparatus selected from a stirrer, a jet nozzle and means for injecting the gas, and the zone of limited backmixing comprises a reaction product outlet, a first cylindrical internal element which in the interior extends in the longitudinal direction of the reactor and which delimits the zone of limited backmixing from the backmixed zone, backmixing-preventing second internal elements in the form of random packings, structured packings or liquid-permeable trays arranged in thType: GrantFiled: September 3, 2019Date of Patent: January 30, 2024Assignee: BASF SEInventors: Oliver Bey, Peter Zehner, Michael Acker, Rocco Paciello, Mathias Schelwies, Martin Haubner, Guenter Wegner, Gerd Tebben, Gunnar Heydrich, Georg Seeber
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Patent number: 11766653Abstract: A process for performing a continuous gas/liquid biphasic high-pressure reaction, wherein a gas and a liquid are introduced into a backmixed zone of a reactor and in the backmixed zone the gas is dispersed in the liquid by stirring, injection of gas and/or a liquid jet, a reaction mixture consecutively traverses the backmixed zone and a zone of limited backmixing, and a liquid reaction product is withdrawn at a reaction product outlet of the zone of limited backmixing, wherein the reactor comprises: an interior formed by a cylindrical vertically oriented elongate shell, a bottom and a cap, wherein the interior is divided by means of internals into the backmixed zone, the zone of limited backmixing and a cavity, a first cylindrical internal element which in the interior extends in the longitudinal direction of the reactor and which delimits the zone of limited backmixing from the backmixed zone, backmixing-preventing second internal elements in the form of random packings, structured packings or liquid-permeabType: GrantFiled: September 3, 2019Date of Patent: September 26, 2023Assignee: BASF SEInventors: Oliver Bey, Peter Zehner, Andreas Keller, Stephanie Renz, Mathias Schelwies, Rocco Paciello, Martin Haubner, Guenter Wegner, Gerd Tebben, Gunnar Heydrich, Georg Seeber
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Patent number: 11529607Abstract: A reactor for performing a reaction between two immiscible fluids of different density, comprising an interior formed by a cylindrical, vertically oriented elongate shell, a bottom and a cap, wherein the interior is divided by internals into a backmixed zone, a zone of limited backmixing preferably arranged below the backmixed zone and a plug-flow zone which are at least consecutively traversable by one of the fluids, wherein the backmixed zone comprises at least one inlet and the plug-flow zone comprises an outlet and the backmixed zone comprises at least one mixing apparatus selected from a stirrer, a jet nozzle and means for injecting the fluid of lower density, a first cylindrical internal element which in the interior extends in the longitudinal direction of the reactor, which delimits the zone of limited backmixing from the plug-flow zone and which comprises a first passage to the backmixed zone and a second passage to the plug-flow zone, a second internal element which delimits the backmixed zone fromType: GrantFiled: September 3, 2019Date of Patent: December 20, 2022Assignee: BASF SEInventors: Oliver Bey, Peter Zehner, Mathias Schelwies, Rocco Paciello, Martin Haubner, Guenter Wegner, Gerd Tebben, Gunnar Heydrich, Georg Seeber, Michael Acker
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Patent number: 11242306Abstract: Process for the continuous production of an optically active carbonyl compound by asymmetric hydrogenation of a prochiral ?,?-unsaturated carbonyl compound with hydrogen in the presence of a homogeneous rhodium catalyst that has at least one chiral ligand, wherein a liquid reaction mixture comprising the prochiral ?,?-unsaturated carbonyl compound is subjected in a first, backmixed reactor to a gas/liquid two-phase hydrogenation, and the liquid reaction mixture is then further hydrogenated in a second reactor, wherein the prochiral ?,?-unsaturated carbonyl compound is employed in the first reactor in a concentration from 3% to 20% by weight. The process allows a high total conversion to the prochiral ?,?-unsaturated carbonyl compound.Type: GrantFiled: September 3, 2019Date of Patent: February 8, 2022Assignee: BASF SEInventors: Peter Zehner, Oliver Bey
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Publication number: 20210371361Abstract: A reactor for performing a gas/liquid biphasic high-pressure reaction with a foaming medium, comprising an interior formed by a cylindrical, vertically oriented elongate shell, a bottom and a cap, wherein the interior is divided by internals into a backmixed zone and a zone of limited backmixing, wherein the backmixed zone and the zone of limited backmixing are consecutively traversable by the reaction mixture, wherein the backmixed zone comprises means for introducing gas and liquid and a gas outlet and also comprises at least one mixing apparatus selected from a stirrer, a jet nozzle and means for injecting the gas, and the zone of limited backmixing comprises a reaction product outlet, a first cylindrical internal element which in the interior extends in the longitudinal direction of the reactor and which delimits the zone of limited backmixing from the backmixed zone, backmixing-preventing second internal elements in the form of random packings, structured packings or liquid-permeable trays arranged in thType: ApplicationFiled: September 3, 2019Publication date: December 2, 2021Inventors: Oliver BEY, Peter ZEHNER, Michael ACKER, Rocco PACIELLO, Mathias SCHELWIES, Martin HAUBNER, Guenter WEGNER, Gerd TEBBEN, Gunnar HEYDRICH, Georg SEEBER
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Publication number: 20210354101Abstract: A process for performing a continuous gas/liquid biphasic high-pressure reaction, wherein a gas and a liquid are introduced into a backmixed zone of a reactor and in the backmixed zone the gas is dispersed in the liquid by stirring, injection of gas and/or a liquid jet, a reaction mixture consecutively traverses the backmixed zone and a zone of limited backmixing, and a liquid reaction product is withdrawn at a reaction product outlet of the zone of limited backmixing, wherein the reactor comprises: an interior formed by a cylindrical vertically oriented elongate shell, a bottom and a cap, wherein the interior is divided by means of internals into the backmixed zone, the zone of limited backmixing and a cavity, a first cylindrical internal element which in the interior extends in the longitudinal direction of the reactor and which delimits the zone of limited backmixing from the backmixed zone, backmixing-preventing second internal elements in the form of random packings, structured packings or liquid-permeabType: ApplicationFiled: September 3, 2019Publication date: November 18, 2021Inventors: Oliver BEY, Peter ZEHNER, Andreas KELLER, Stephanie RENZ, Mathias SCHELWIES, Rocco PACIELLO, Martin HAUBNER, Guenter WEGNER, Gerd TEBBEN, Gunnar HEYDRICH, Georg SEEBER
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Publication number: 20210275987Abstract: A reactor for performing a reaction between two immiscible fluids of different density, comprising an interior formed by a cylindrical, vertically oriented elongate shell, a bottom and a cap, wherein the interior is divided by internals into a backmixed zone, a zone of limited backmixing preferably arranged below the backmixed zone and a plug-flow zone which are at least consecutively traversable by one of the fluids, wherein the backmixed zone comprises at least one inlet and the plug-flow zone comprises an outlet and the backmixed zone comprises at least one mixing apparatus selected from a stirrer, a jet nozzle and means for injecting the fluid of lower density, a first cylindrical internal element which in the interior extends in the longitudinal direction of the reactor, which delimits the zone of limited backmixing from the plug-flow zone and which comprises a first passage to the backmixed zone and a second passage to the plug-flow zone, a second internal element which delimits the backmixed zone fromType: ApplicationFiled: September 3, 2019Publication date: September 9, 2021Inventors: Oliver BEY, Peter ZEHNER, Mathias SCHELWIES, Rocco PACIELLO, Martin HAUBNER, Guenter WEGNER, Gerd TEBBEN, Gunnar HEYDRICH, Georg SEEBER, Michael ACKER
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Publication number: 20210214296Abstract: Process for the continuous production of an optically active carbonyl compound by asymmetric hydrogenation of a prochiral ?,?-unsaturated carbonyl compound with hydrogen in the presence of a homogeneous rhodium catalyst that has at least one chiral ligand, wherein a liquid reaction mixture comprising the prochiral ?,?-unsaturated carbonyl compound is subjected in a first, backmixed reactor to a gas/liquid two-phase hydrogenation, and the liquid reaction mixture is then further hydrogenated in a second reactor, wherein the prochiral ?,?-unsaturated carbonyl compound is employed in the first reactor in a concentration from 3% to 20% by weight. The process allows a high total conversion to the prochiral ?,?-unsaturated carbonyl compound.Type: ApplicationFiled: September 3, 2019Publication date: July 15, 2021Inventors: Peter ZEHNER, Oliver BEY
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Patent number: 9302237Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. In the apparatus of the invention, the diversion of an internal circulatory flow in the reactor is effected by means of a diversion pan which is arranged underneath a heat exchanger.Type: GrantFiled: January 6, 2014Date of Patent: April 5, 2016Assignee: BASF SEInventors: Oliver Bey, Christian Kunkelmann, Roland Bauer, Andreas Raichle, Hartmut Riechers, Peter Zehner
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Patent number: 9295971Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. Here, the cooling medium surrounds the tubes of the heat exchanger of the apparatus of the invention whereas the reaction takes place in the tubes.Type: GrantFiled: January 6, 2014Date of Patent: March 29, 2016Assignee: BASF SEInventors: Oliver Bey, Andreas Raichle, Hartmut Riechers, Roland Mueller, Wolfgang Mackenroth, Peter Zehner
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Patent number: 9249029Abstract: The invention relates to an improved process for vaporizing organic compounds and the further conversion thereof.Type: GrantFiled: January 21, 2011Date of Patent: February 2, 2016Assignee: BASF SEInventors: Ralf Boehling, Michael Schipper, Stefan Birnbach, Peter Petersen, Achim Gritsch, Alois Wellisch, Hermann Luyken, Albert Steiner, Peter Zehner
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Patent number: 8859805Abstract: The invention relates to a multistage process for the continuous preparation of organic, distillable polyisocyanates, preferably diisocyanates, particularly preferably aliphatic or cycloaliphatic diisocyanates, by reaction of the corresponding organic polyamines with carbonic acid derivatives and alcohols to form low molecular weight monomeric polyurethanes and thermal dissociation of the latter, in which the polyisocyanates produced and unusable residues are separated off at particular stages of the reaction and reusable by-products and intermediates are recirculated to preceding stages.Type: GrantFiled: September 9, 2010Date of Patent: October 14, 2014Assignee: BASF SEInventors: Torsten Mattke, Matthias Kloetzer, Eckhard Stroefer, Bernhard Geissler, Peter Zehner
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Publication number: 20140200370Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. Here, the cooling medium surrounds the tubes of the heat exchanger of the apparatus of the invention whereas the reaction takes place in the tubes.Type: ApplicationFiled: January 6, 2014Publication date: July 17, 2014Applicant: BASF SEInventors: Oliver BEY, Andreas RAICHLE, Hartmut RIECHERS, Roland MUELLER, Wolfgang MACKENROTH, Peter ZEHNER
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Publication number: 20140200369Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. In the apparatus of the invention, the diversion of an internal circulatory flow in the reactor is effected by means of a diversion pan which is arranged underneath a heat exchanger.Type: ApplicationFiled: January 6, 2014Publication date: July 17, 2014Applicant: BASF SEInventors: Oliver BEY, Christian KUNKELMANN, Roland BAUER, Andreas RAICHLE, Hartmut RIECHERS, Peter ZEHNER
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Publication number: 20140200351Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. The apparatus of the invention comprises one or more ejectors which each comprise a diffuser.Type: ApplicationFiled: January 6, 2014Publication date: July 17, 2014Applicant: BASF SEInventors: Oliver BEY, Christian Kunkelmann, Roland Bauer, Patrick Huebler, Peter Zehner
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Publication number: 20140124356Abstract: The present invention relates to a process for solar thermal energy production in which switching between daytime and nighttime operation is possible, and also to a device for solar thermal energy production. The present invention relates, in particular, to the use of the process and of the device for producing drinking water or service water.Type: ApplicationFiled: November 1, 2013Publication date: May 8, 2014Applicant: BASF SEInventors: Christian MUELLER, Otto MACHHAMMER, Peter ZEHNER
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Publication number: 20140064017Abstract: A process for mixing a liquid stored in a vessel, in which gas is sucked in from the gas phase present above the liquid interface with a suction apparatus present in the liquid, and released into it again for the gas-induced mixing of the liquid.Type: ApplicationFiled: August 21, 2013Publication date: March 6, 2014Inventors: Michael Blechschmitt, Ulrich Hammon, Friedrich-Georg Martin, Klaus Joachim Mueller-Engel, Peter Zehner
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Patent number: 8579495Abstract: A process for mixing a liquid stored in a vessel, in which gas is sucked in from the gas phase present above the liquid interface with a suction apparatus present in the liquid, and released into it again for the gas-induced mixing of the liquid.Type: GrantFiled: September 19, 2007Date of Patent: November 12, 2013Assignee: BASF SEInventors: Michael Blechschmitt, Ulrich Hammon, Friedrich-Georg Martin, Klaus Joachim Mueller-Engel, Peter Zehner
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Patent number: 8492584Abstract: The invention relates to a process for oxidizing at least one organic substance with oxygen, which comprises the following steps: (a) adding the at least one organic substance as a liquid and an oxygenous gas stream to a first reaction stage to form a reaction mixture, at least some of the oxygen reacting with the organic compound to form a reaction product, (b) adding the reaction mixture from the first reaction stage to an adiabatically operated reaction stage in which the unconverted organic substance reacts further at least partly to give the product. The invention further relates to an apparatus for performing the process.Type: GrantFiled: August 18, 2008Date of Patent: July 23, 2013Assignee: BASF SEInventors: Joaquim Henrique Teles, Steffen Oehlenschläger, Kai Gumlich, Martin Schäfer, Stephan Lamm, Stefan Berg, Michael Nilles, Hans-Peter Schildberg, Tilo John, Peter Zehner
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Publication number: 20120292176Abstract: A process and an apparatus for obtaining pure water from seawater, comprising: a) a raw water is provided that comprises at least one non-volatile component (salt), b) the raw water provided is passed as cooling medium into a heat ex-changer, c) additional heat is supplied to the raw water that is heated in the heat exchanger, d) the raw water from step c) is fed to an evaporation zone, e) a carrier gas suitable for water vapour is provided (air), f) the carrier gas is brought into contact with the raw water in counter current flow in the evaporation zone which contains baffles, wherein the carrier gas takes up water vapour from the raw water, g) the raw water that is obtained in step f) that is enriched with the at least one non-volatile component is taken off from the evaporation zone, h) the water vapour- loaded carrier gas from the evaporation zone is fed to the heat exchanger and is cooled in counter current flow to the raw water, wherein the water vapour present in the carrier gas partially condenses ouType: ApplicationFiled: February 9, 2011Publication date: November 22, 2012Applicant: BASF SEInventors: Otto Machhammmer, Christian Mueller, Peter Zehner