Patents by Inventor Ricarda Leiberich
Ricarda Leiberich 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: 11578157Abstract: The invention relates to an efficient process for the preparation of isoolefin polymers such as polyisobutene or butyl rubber by polymerization of isobutene and optionally further monomers in the presence of an initiator system prepared by continuously contacting at least one boron or aluminium compound and at least one initiator.Type: GrantFiled: July 6, 2018Date of Patent: February 14, 2023Assignee: ARLANXEO DEUTSCHLAND GMBHInventors: Hanns-Ingolf Paul, Rolf Feller, Udo Wiesner, Carsten Kreuder, Adam Gronowski, Ricarda Leiberich, Joachim Ritter
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Publication number: 20210147590Abstract: The invention relates to an efficient process for the preparation of isoolefin polymers such as polyisobutene or butyl rubber by polymerization of a liquid medium comprising the monomer(s) and ethane or carbon dioxide that is substantially dissolved therein.Type: ApplicationFiled: July 6, 2018Publication date: May 20, 2021Inventors: Hanns-Ingolf PAUL, Rolf FELLER, John George Arnold LOVEGROVE, Jörg KIRCHHOFF, Paul WAGNER, Ricarda LEIBERICH, Joachim RITTER
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Publication number: 20210139621Abstract: The invention relates to an efficient process for the preparation of isoolefin polymers such as polyisobutene or butyl rubber by polymerization of isobutene and optionally further monomers in the presence of an initiator system prepared by continuously contacting at least one boron or aluminium compound and at least one initiator.Type: ApplicationFiled: July 6, 2018Publication date: May 13, 2021Inventors: Hanns-Ingolf PAUL, Rolf FELLER, Udo WIESNER, Carsten KREUDER, Adam GRONOWSKI, Ricarda LEIBERICH, Joachim RITTER
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Patent number: 10131617Abstract: The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of at least one optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of distillation and recovered.Type: GrantFiled: May 4, 2015Date of Patent: November 20, 2018Assignee: COVESTRO DEUTSCHLAND AGInventors: Karl-Heinz Köhler, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski, Henning Kahnis, Gabriel Denecker, Johan Vanden Eynde, Weerachanan Somhom
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Patent number: 10125083Abstract: The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of an optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of crystallization and recovered.Type: GrantFiled: May 5, 2015Date of Patent: November 13, 2018Assignee: COVESTRO DEUTSCHLAND AGInventors: Karl-Heinz Köhler, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski, Henning Kahnis, Gabriel Denecker, Johan Vanden Eynde, Weerachanan Somhom
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Patent number: 9765012Abstract: The present application relates to a method for the continuous production of diaryl carbonate from phosgene and of at least one monohydroxy compound (monophenol) in the presence of catalysts, and to the use thereof for the production of polycarbonates.Type: GrantFiled: December 17, 2013Date of Patent: September 19, 2017Assignee: Covestro Deutschland AGInventors: Karl-Heinz Köhler, Henning Kahnis, Johan Vanden Eynde, Gabriel Denecker, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski
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Patent number: 9657158Abstract: The invention relates to an energy efficient, environmentally favorable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.Type: GrantFiled: July 28, 2015Date of Patent: May 23, 2017Assignee: ARLANXEO Deutschland GmbHInventors: Ricarda Leiberich, Joachim Ritter, Hanns-Ingolf Paul, Udo Wiesner, Holger Luesgen
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Publication number: 20170073299Abstract: The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of an optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of crystallization and recovered.Type: ApplicationFiled: May 5, 2015Publication date: March 16, 2017Inventors: Karl-Heinz Köhler, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski, Henning Kahnis, Gabriel Denecker, Johan Vanden Eynde, Weerachanan Somhom
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Publication number: 20170073300Abstract: The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of at least one optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of distillation and recovered.Type: ApplicationFiled: May 4, 2015Publication date: March 16, 2017Inventors: Karl-Heinz Köhler, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski, Henning Kahnis, Gabriel Denecker, Johan Vanden Eynde, Weerachanan Somhom
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Patent number: 9562125Abstract: The present invention relates to a method to control a liquid feed stream carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity.Type: GrantFiled: September 23, 2011Date of Patent: February 7, 2017Assignee: ARLANXEO Deutschland GmbHInventors: Ursula Tracht, Ricarda Leiberich, Michael Berger, Hanns-Ingolf Paul, Udo Wiesner
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Publication number: 20160002143Abstract: The present application relates to a method for the continuous production of diaryl carbonate from phosgene and of at least one monohydroxy compound (monophenol) in the presence of catalysts, and to the use thereof for the production of polycarbonates.Type: ApplicationFiled: December 17, 2013Publication date: January 7, 2016Applicant: BAYER MATERIALSCIENCE AGInventors: Karl-Heinz KÖHLER, Henning KAHNIS, Johan VANDEN EYNDE, Gabriel DENECKER, Ricarda LEIBERICH, Kaspar HALLENBERGER, Korbinian KRÄMER, Florian LIPSKI
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Publication number: 20150329700Abstract: The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.Type: ApplicationFiled: July 28, 2015Publication date: November 19, 2015Inventors: Ricarda LEIBERICH, Joachim RITTER, Hanns-Ingolf PAUL, Udo WIESNER, Holger LUESGEN
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Patent number: 9127137Abstract: The invention relates to an energy efficient, environmentally favorable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.Type: GrantFiled: July 17, 2012Date of Patent: September 8, 2015Assignee: LANXESS INTERNATIONAL SAInventors: Ricarda Leiberich, Joachim Ritter, Hanns-Ingolf Paul, Udo Wiesner, Holger Luesgen
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Patent number: 9068031Abstract: The present invention relates to a reactor (10) and a process for continuous polymerization, where the reactor (10) has an essentially tubular reactor housing (16). The reactor housing (16) has a drive (38) which runs along the geometric central axis (12) in the flow direction (22) and is configured as a central shaft. A rotatably arranged scraper or wiper (36) is provided within the reactor housing (16); the scraper or wiper (36) has at least one scraper or wiper blade (42) to run along an interior side (44) of the reactor housing (16). The rotational movement of the scraper or wiper (36) results in radial mixing of a stream within the reactor housing (16) which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or a loop flow or backflow within the reactor (10) or else via an additional external pumped circulation system (23) possible.Type: GrantFiled: December 29, 2011Date of Patent: June 30, 2015Assignee: LANXESS INTERNATIONAL SAInventors: Hanns-Ingolf Paul, Rolf Feller, Paul Wagner, John Lovegrove, Joachim Ritter, Ricarda Leiberich, Jörg Kirchhoff, Udo Wiesner
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Patent number: 9040732Abstract: The invention provides a process for preparing diaryl carbonates from dialkyl carbonates and aromatic hydroxyl compounds using at least two reaction columns, a process section for recovering the dialkyl carbonate used in the reaction and for removing the alcohol of reaction, one or more process steps for removing the by-products obtained in the process which have a boiling point between that of the dialkyl carbonate and that of the alkyl aryl carbonate formed during the preparation of the diaryl carbonate, and a process step for further purification of the diaryl carbonate obtained from the reaction columns.Type: GrantFiled: June 12, 2009Date of Patent: May 26, 2015Assignee: Bayer MaterialScience AGInventors: Andre Düx, Guenter Olf, Kaspar Hallenberger, Georg Ronge, Ricarda Leiberich, Johan Vanden Eynde, Wim Wuytack, Pieter Ooms, Johann Rechner
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Publication number: 20140309362Abstract: The invention relates to an energy efficient, environmentally favourable process for the preparation of brominated butyl rubbers, that uses a bromination agent and a oxidizing agent in order to enhance the utilization of bromine contained in the bromination agent. In a preferred embodiment a common medium for both solution polymerization and subsequent bromination of the rubber is employed.Type: ApplicationFiled: July 17, 2012Publication date: October 16, 2014Applicant: LANXESS INTERNATIONAL SAInventors: Ricarda Leiberich, Joachim Ritter, Hanns-Ingolf Paul, Udo Wiesner, Holger Luesgen
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Patent number: 8747756Abstract: The present invention relates to a reactor (10) and a process for continuous polymerization, where the reactor (10) has an essentially tubular reactor housing (16). The reactor housing (16) has a drive (38) which runs along the geometric central axis (12) in the flow direction (22) and is configured as a central shaft. A rotatably arranged scraper or wiper (36) is provided within the reactor housing (16); the scraper or wiper (36) has at least one scraper or wiper blade (42) to run along an interior side (44) of the reactor housing (16). The rotational movement of the scraper or wiper (36) results in radial mixing of a stream within the reactor housing (16) which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or backflow within the reactor (10) possible.Type: GrantFiled: July 1, 2010Date of Patent: June 10, 2014Assignee: LANXESS International SAInventors: Rolf Feller, Hanns-Ingolf Paul, Paul Wagner, John Lovegrove, Jörg Kirchhoff, Joachim Ritter, Ricarda Leiberich, Udo Wiesner
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Publication number: 20140148561Abstract: The present invention relates to a reactor (10) and a process for continuous polymerization, where the reactor (10) has an essentially tubular reactor housing (16). The reactor housing (16) has a drive (38) which runs along the geometric central axis (12) in the flow direction (22) and is configured as a central shaft. A rotatably arranged scraper or wiper (36) is provided within the reactor housing (16); the scraper or wiper (36) has at least one scraper or wiper blade (42) to run along an interior side (44) of the reactor housing (16). The rotational movement of the scraper or wiper (36) results in radial mixing of a stream within the reactor housing (16) which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or a loop flow or backflow within the reactor (10) or else via an additional external pumped circulation system (23) possible.Type: ApplicationFiled: December 29, 2011Publication date: May 29, 2014Applicant: LANXESS INTERNATIONAL S.A.Inventors: Hanns-Ingolf Paul, Rolf Feller, Paul Wagner, John Lovegrove, Joachim Ritter, Ricarda Leiberich, Jörg Kirchhoff, Udo Wiesner
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Publication number: 20140058050Abstract: The present invention relates to a method to control a liquid feed stream carried out by measuring at least one spectrum of the liquid feed stream comprising an initiator or catalyst, determining its activity using a predictive model on the basis of said spectrum and adjusting the feed streams and/or the preparation conditions of the feed stream comprising the initiators or catalysts in order to attain or maintain a desired level of total activity.Type: ApplicationFiled: September 23, 2011Publication date: February 27, 2014Applicant: LANXESS Deutschland GmbHInventors: Ursula Tracht, Ricarda Leiberich, Michael Berger, Hanns-Ingolf Paul, Udo Wiesner
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Publication number: 20120302706Abstract: The present invention relates to a reactor (10) and a process for continuous polymerization, where the reactor (10) has an essentially tubular reactor housing (16). The reactor housing (16) has a drive (38) which runs along the geometric central axis (12) in the flow direction (22) and is configured as a central shaft. A rotatably arranged scraper or wiper (36) is provided within the reactor housing (16); the scraper or wiper (36) has at least one scraper or wiper blade (42) to run along an interior side (44) of the reactor housing (16). The rotational movement of the scraper or wiper (36) results in radial mixing of a stream within the reactor housing (16) which dominates gravity effects and, by virtue of shaping of the scrapers or wipers, optionally makes plug flow or backflow within the reactor (10) possible.Type: ApplicationFiled: July 1, 2010Publication date: November 29, 2012Applicant: LANXESS INTERNATIONAL SAInventors: Rolf Feller, Hanns-Ingolf Paul, Paul Wagner, John Lovegrove, Jörg Kirchhoff, Joachim Ritter, Ricarda Leiberich, Udo Wiesner