Patents by Inventor Georg Friedrich Thiele
Georg Friedrich Thiele 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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Publication number: 20230382829Abstract: A method for preparing 1,2-propanediol involves reacting propene with hydrogen peroxide, in the presence of a phase transfer catalyst and a heteropolytungstate, in a liquid reaction mixture containing an aqueous phase with a maximum apparent pH of 6 and an organic phase containing a solvent having a solubility in water at 20° C. of less than 500 mg/kg. The method then involves separating the liquid reaction mixture into an aqueous phase containing 1,2-propanediol and an organic phase; recycling at least a part of the separated organic phase to the reaction; and extracting the separated aqueous phase with an extractant solution containing the same phase transfer catalyst and solvent as used in the reaction to provide an extracted aqueous phase and an extract phase. The method further involves recycling at least a part of the extract phase to the reaction and recovering 1,2-propanediol from the extracted aqueous phase.Type: ApplicationFiled: October 7, 2021Publication date: November 30, 2023Applicant: Evonik Operations GmbHInventors: Holger Wiederhold, David Bolz, Georg Friedrich Thiele, Bernd Jaeger, Hans-Jürgen Köhle, Sebastian Imm, Marina Lazar
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Publication number: 20230271130Abstract: A facility and a process with four membrane separation units, where the second separation unit separates the retentate of the first unit, the third separation unit separates the permeate of the first unit, the fourth separation unit separates the retentate of the third unit, the permeate of the second unit and the retentate of the fourth unit are recycled to the feed to the first unit, the permeate of the fourth unit is passed to a methane oxidation unit and the permeate of the third unit is discharged to the atmosphere allows separating methane and carbon dioxide from a gas stream, providing a methane rich stream with the retentate of the second unit at a high methane yield and adhering to low limits for methane discharge to the atmosphere with a small size methane oxidation unit.Type: ApplicationFiled: July 1, 2021Publication date: August 31, 2023Applicant: EVONIK OPERATIONS GMBHInventors: Markus PRISKE, Hanns KUHLMANN, Georg Friedrich THIELE
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Patent number: 10597374Abstract: The integrated process comprises a step a) of dehydrogenating propane providing a stream S1 comprising propane and propene; a step b) of separating stream S1 in at least one rectification column, providing an overhead product stream S2 comprising more than 99% by weight propene, a side stream S3 comprising from 90 to 98% by weight propene and a bottoms product stream S4 enriched in propane; a step c) of reacting propene with hydrogen peroxide in the presence of an epoxidation catalyst using propene in molar excess; and a step d) of separating non-reacted propene and propene oxide from the reaction mixture of step c) providing a propene oxide product and a stream S5 comprising propene and propane; wherein stream S3 is passed to step c), stream S5 is recycled to step b) and stream S4 is recycled to step a).Type: GrantFiled: May 11, 2017Date of Patent: March 24, 2020Assignees: Evonik Operations GmbH, thyssenkrupp Industrial Solutions AGInventors: Holger Wiederhold, David Bolz, Georg Friedrich Thiele
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Publication number: 20190276419Abstract: The integrated process comprises a step a) of dehydrogenating propane providing a stream S1 comprising propane and propene; a step b) of separating stream S1 in at least one rectification column, providing an overhead product stream S2 comprising more than 99% by weight propene, a side stream S3 comprising from 90 to 98% by weight propene and a bottoms product stream S4 enriched in propane; a step c) of reacting propene with hydrogen peroxide in the presence of an epoxidation catalyst using propene in molar excess; and a step d) of separating non-reacted propene and propene oxide from the reaction mixture of step c) providing a propene oxide product and a stream S5 comprising propene and propane; wherein stream S3 is passed to step c), stream S5 is recycled to step b) and stream S4 is recycled to step a).Type: ApplicationFiled: May 11, 2017Publication date: September 12, 2019Applicants: EVONIK DEGUSSA GMBH, thyssenkrupp Industrial Solutions AGInventors: Holger WIEDERHOLD, David BOLZ, Georg Friedrich THIELE
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Patent number: 10214471Abstract: The process for preparing 1,2-propanediol from propene and hydrogen peroxide comprises the steps of a) reacting propene with hydrogen peroxide in the presence of a catalyst mixture comprising a phase transfer catalyst and a heteropolytungstate, wherein the reaction is carried out in a liquid mixture comprising an aqueous phase having a pH of at most 6 and an organic phase, b) separating the biphasic mixture from step a) into an aqueous phase and an organic phase comprising propene oxide, c) recycling the propene oxide present in the separated organic phase into the reaction of step a) and d) separating 1,2-propanediol from the aqueous phase separated in step b).Type: GrantFiled: November 1, 2016Date of Patent: February 26, 2019Assignee: Evonik Degussa GmbHInventors: Holger Wiederhold, David Bolz, Bernd Jaeger, Hans-Jürgen Köhle, Sebastian Imm, Georg Friedrich Thiele
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Publication number: 20180354878Abstract: The process for preparing 1,2-propanediol from propene and hydrogen peroxide comprises the steps of a) reacting propene with hydrogen peroxide in the presence of a catalyst mixture comprising a phase transfer catalyst and a heteropolytungstate, wherein the reaction is carried out in a liquid mixture comprising an aqueous phase having a pH of at most 6 and an organic phase, b) separating the biphasic mixture from step a) into an aqueous phase and an organic phase comprising propene oxide, c) recycling the propene oxide present in the separated organic phase into the reaction of step a) and d) separating 1,2-propanediol from the aqueous phase separated in step b).Type: ApplicationFiled: November 1, 2016Publication date: December 13, 2018Applicant: EVONIK DEGUSSA GMBHInventors: Holger Wiederhold, David BOLZ, Bernd JAEGER, Hnas-Jürgen KÖHLE, Sebastian IMM, Georg Friedrich THIELE
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Publication number: 20180057473Abstract: The method for the epoxidation of propene comprises continuously reacting propene with hydrogen peroxide in the presence of a homogeneous epoxidation catalyst in a reaction mixture comprising an aqueous liquid phase and an organic liquid phase using a loop reactor with mixing of the liquid phases, withdrawing aqueous phase from the loop reactor and extracting it by liquid-liquid-extraction using propene as extractant to provide an extract comprising propene and propene oxide.Type: ApplicationFiled: February 3, 2016Publication date: March 1, 2018Applicant: Evonik Degussa GmbHInventors: Juergen Stock, Daniel REIN, Jörg SCHALLENBERG, Georg Friedrich THIELE
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Patent number: 6639108Abstract: A process for the work-up of a reaction mixture formed by ammoximation of a ketone, in particular an alkanone or cycloalkanone, by means of hydrogen peroxide and ammonia in homogeneous solution over a titanium-containing catalyst. It comprises the substeps removal of the catalyst, selective separation of the oxime formed in the ammoximation from the reaction mixture, removal of water of reaction and recirculation of the solvent. The work-up is carried out using at least one membrane separation step and is also successful in the case of incomplete ketone conversion and in the presence of dissolved salts.Type: GrantFiled: September 3, 2002Date of Patent: October 28, 2003Assignee: Degussa AGInventors: Thomas Schiffer, Peter Ernst Esser, Martin Roos, Franz-Felix Kuppinger, Günter Stevermüer, Georg Friedrich Thiele
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Patent number: 6620970Abstract: The present invention relates to a process for working up an ammoximation reaction mixture, by separating a catalyst from the reaction mixture, removing the ketone oxime product, discharging the water of the reaction, and recirculating a solvent, where the ketone oxime formed is removed in a liquid phase with at least one liquid-liquid extraction in a ternary solvent system.Type: GrantFiled: September 3, 2002Date of Patent: September 16, 2003Assignee: Degussa AGInventors: Thomas Schiffer, Peter Ernst Esser, Jörg Krissmann, Martin Roos, Günter Stevermüer, Georg Friedrich Thiele
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Publication number: 20030105356Abstract: A process for the work-up of a reaction mixture formed by ammoximation of a ketone, in particular an alkanone or cycloalkanone, by means of hydrogen peroxide and ammonia in homogeneous solution over a titanium-containing catalyst. It comprises the substeps removal of the catalyst, selective separation of the oxime formed in the ammoximation from the reaction mixture, removal of water of reaction and recirculation of the solvent. The work-up is carried out using at least one membrane separation step and is also successful in the case of incomplete ketone conversion and in the presence of dissolved salts.Type: ApplicationFiled: September 3, 2002Publication date: June 5, 2003Applicant: DEGUSSA AGInventors: Thomas Schiffer, Peter Ernst Esser, Martin Roos, Franz-Felix Kuppinger, Gunter Stevermuer, Georg Friedrich Thiele
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Patent number: 6566555Abstract: Oximes are prepared by reacting carbonyl compounds, hydrogen peroxide and ammonia in the presence of a catalyst system comprising a catalyst comprising titanium, silicon and oxygen and a cocatalyst comprising an acidic solid comprising an organic or inorganic support material, where either the support material itself has Lewis-acid or Brönsted acid properties, or Lewis-acid or Brönsted-acid functional groups are applied to the support material.Type: GrantFiled: September 26, 2001Date of Patent: May 20, 2003Assignee: Degussa AGInventors: Georg Friedrich Thiele, Steffen Hasenzahl, Thomas Schiffer
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Publication number: 20030065220Abstract: The present invention relates to a process for working up an ammoximation reaction mixture, by separating a catalyst from the reaction mixture, removing the ketone oxime product, discharging the water of the reaction, and recirculating a solvent, where the ketone oxime formed is removed in a liquid phase with at least one liquid-liquid extraction in a ternary solvent system.Type: ApplicationFiled: September 3, 2002Publication date: April 3, 2003Applicant: DEGUSSA AGInventors: Thomas Schiffer, Peter Ernst Esser, Jorg Krissmann, Martin Roos, Gunter Stevermuer, Georg Friedrich Thiele
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Patent number: 6462235Abstract: Oximes are produced in high yields and with high selectivity by reacting aldehydes or ketones with hydrogen peroxide and ammonia in the presence of a heterogeneous catalyst and an ammonium salt or substituted ammonium salt. The heterogeneous catalyst is synthesized on the basis of titanium, silicon and oxygen. Optionally, a Lewis-acid and/or Brnsted-acid cocatalyst can be present.Type: GrantFiled: November 21, 2001Date of Patent: October 8, 2002Assignee: Degussa AGInventors: Georg Friedrich Thiele, Thomas Schiffer, Georg Oenbrink
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Publication number: 20020143210Abstract: Oximes are produced in high yields and with high selectivity by reacting aldehydes or ketones with hydrogen peroxide and ammonia in the presence of a heterogeneous catalyst and an ammonium salt or substituted ammonium salt. The heterogeneous catalyst is synthesized on the basis of titanium, silicon and oxygen. Optionally, a Lewis-acid and/or Brønsted-acid cocatalyst can be present.Type: ApplicationFiled: November 21, 2001Publication date: October 3, 2002Applicant: DEGUSSA AGInventors: Georg Friedrich Thiele, Thomas Schiffer, Georg Oenbrink
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Publication number: 20020058840Abstract: Oximes are prepared by reacting carbonyl compounds, hydrogen peroxide and ammonia in the presence of a catalyst system comprising a catalyst comprising titanium, silicon and oxygen and a cocatalyst comprising an acidic solid comprising an organic or inorganic support material, where either the support material itself has Lewis-acid or Brönsted acid properties, or Lewis-acid or Brönsted-acid functional groups are applied to the support material.Type: ApplicationFiled: September 26, 2001Publication date: May 16, 2002Applicant: DEGUSSA AGInventors: Georg Friedrich Thiele, Steffen Hasenzahl, Thomas Schiffer