Patents by Inventor Thomas Letzelter
Thomas Letzelter 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: 11862795Abstract: Process for modifying an electrode active material according to general formula Li1+xTM1?xO2, wherein TM contains a combination of Ni and at least one transition metal selected from Co and Mn, and, optionally, at least one metal selected from Al, Ba, and Mg and, optionally, one or more transition metals other than Ni, Co, and Mn, wherein at least 75 mole-% of TM is Ni, and x is in the range of from ?0.05 to 0.2, said process comprising the steps of (a) treating said Li1+xTM1?xO2 with an aqueous medium with a pH value of at least 5 and up to 14, (b) removing said aqueous medium from treated Li1+xTM1?xO2 by way of a solid-liquid separation, wherein steps (a) and (b) are commenced with a maximum time difference of 3 minutes. In addition, the present invention is directed towards Ni-rich electrode active materials.Type: GrantFiled: June 17, 2019Date of Patent: January 2, 2024Assignee: BASF SEInventors: Christoph Erk, Thomas Letzelter, Markus Hoelzle, Carsten Sueling
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Publication number: 20230406723Abstract: Described herein is a process for manufacture of a cathode active material including the steps of (a) providing a particulate electrode active material according to general formula Li1+xTM1?xO2, where TM is Ni and, optionally, at least one element selected from the group consisting of Al, Mg, Ba, and transition metals other than Ni, and x is in a range of from ?0.05 to 0.2, and where at least 50 mole-% of TM is Ni, (b) adding an aqueous medium that includes LiOH in dissolved form to the particulate electrode active material provided in step (a), (c) removing the liquid phase by a solid-liquid separation method, and (d) at least partially recycling the liquid phase from step (c) for use in a treatment step.Type: ApplicationFiled: September 16, 2021Publication date: December 21, 2023Inventors: Zhenji HAN, Jumpei NAKAYAMA, Junji KASHIWAGI, Hitoshi FUKUMITSU, Frank RAUSCHER, Christoph ERK, Thomas LETZELTER
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Publication number: 20210376318Abstract: Process for modifying an electrode active material according to general formula Li1+xTM1?xO2, wherein TM contains a combination of Ni and at least one transition metal selected from Co and Mn, and, optionally, at least one metal selected from Al, Ba, and Mg and, optionally, one or more transition metals other than Ni, Co, and Mn, wherein at least 75 mole-% of TM is Ni, and x is in the range of from ?0.05 to 0.2, said process comprising the steps of (a) treating said Li1+xTM1?xO2 with an aqueous medium with a pH value of at least 5 and up to 14, (b) removing said aqueous medium from treated Li1+xTM1?xO2 by way of a solid-liquid separation, wherein steps (a) and (b) are commenced with a maximum time difference of 3 minutes. In addition, the present invention is directed towards Ni-rich electrode active materials.Type: ApplicationFiled: June 17, 2019Publication date: December 2, 2021Applicant: BASF SEInventors: Christoph ERK, Thomas LETZELTER, Markus HOELZLE, Carsten SUELING
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Patent number: 10767105Abstract: The present invention relates to a method for preparing a concentrated polysaccharide mass, in particular a method for preparing concentrated glucan or schizophyllan, in particular a method for redispersing glucan or schizophyllan for producing a ready-to-use mass.Type: GrantFiled: September 30, 2016Date of Patent: September 8, 2020Assignee: BASF SEInventors: Thomas Letzelter, Sascha Rollie, Andreas Bauder, Florian Lehr, Burkhard Ernst, Daniel Silbernagel, Tobias Käppler
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Patent number: 10273514Abstract: The presently claimed invention is directed to a method for the preparation of an aqueous solution comprising at least one beta-glucan comprising at least the steps of a) fermentation of at least one fungal strain in an a fermentation broth, b) addition of at least one acid to the fermentation broth to adjust the pH to a value in the range of ?2.0 to ?4.0 and c) filtration of the fermentation broth to obtain an aqueous solution comprising the at least one beta-glucan and at least one beta-glucan that is obtained by this method.Type: GrantFiled: December 2, 2015Date of Patent: April 30, 2019Assignee: Wintershall Holding GmbHInventors: Sascha Rollie, Tobias Käppler, Carsten Schwalb, Florian Lehr, Andrea Hlubek, Jörg Therre, Christian Fleck, Thomas Letzelter, Stephan Freyer, Andrea Herold, Hansjörg Rettenmaier, Bernd Leonhardt
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Publication number: 20180273831Abstract: The present invention relates to a method for preparing a concentrated polysaccharide mass, in particular a method for preparing concentrated glucan or schizophyllan, in particular a method for redispersing glucan or schizophyllan for producing a ready-to-use mass.Type: ApplicationFiled: September 30, 2016Publication date: September 27, 2018Inventors: THOMAS LETZELTER, Sascha ROLLIE, Andreas BAUDER, Florian LEHR, Burkhard ERNST, Daniel SILBERNAGEL, Tobias KÄPPLER
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Publication number: 20180273647Abstract: The presently claimed invention relates to a method for concentrating a beta-glucan comprising at least the following steps: (a1) contacting an aqueous beta-glucan solution having a concentration [c1] with at least one precipitating agent p1 to obtain a precipitated beta-glucan in a solvent mixture comprising water and the at least one precipitating agent p1; (b1) separating the precipitated beta-glucan from the solvent mixture comprising water and the at least one precipitating agent p1 to obtain a precipitated beta-glucan having a concentration [c2]; and (c1) applying force to the precipitated beta-glucan of (b1) to obtain a precipitated beta-glucan having a concentration [c3].Type: ApplicationFiled: October 30, 2015Publication date: September 27, 2018Inventors: Sascha ROLLIE, Christoph ZIEGLER, Florian LEHR, Tobias KÄPPLER, Andrea SEIBERT, Thomas LETZELTER, Andreas WEBER, Stephan FREYER, Georg GROSSMANN, Burkhard Ernst
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Publication number: 20170362619Abstract: The presently claimed invention is directed to a method for the preparation of an aqueous solution comprising at least one beta-glucan comprising at least the steps of a) fermentation of at least one fungal strain in an a fermentation broth, b) addition of at least one acid to the fermentation broth to adjust the pH to a value in the range of ?2.0 to ?4.0 and c) filtration of the fermentation broth to obtain an aqueous solution comprising the at least one beta-glucan and at least one beta-glucan that is obtained by this method.Type: ApplicationFiled: December 2, 2015Publication date: December 21, 2017Inventors: Sascha ROLLIE, Tobias KÄPPLER, Carsten SCHWALB, Florian LEHR, Andrea HLUBEK, Jörg THERRE, Christian FLECK, Thomas LETZELTER, Stephan FREYER, Andrea HEROLD, Hansjörg RETTENMAIER, Bernd LEONHARDT
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Publication number: 20090143618Abstract: A process is proposed for preparing acid formates in which a liquid stream I comprising formic acid and a liquid stream II comprising a metal formate are prepared, the liquid streams I and II are fed to a rectification column in such a manner that a higher or identical feed point to the rectification column is chosen for the liquid stream II than for the liquid stream I, the liquid streams I and II are mixed in the rectification column, with water being removed overhead from the rectification column and a bottoms stream comprising the acid formate is taken off from the rectification column, which comprises the bottoms stream being produced as melt comprising less than 0.5% by weight of water.Type: ApplicationFiled: November 5, 2004Publication date: June 4, 2009Applicant: BASF AKTIENGESELLSCHAFTInventors: Alexander Hauk, Jorn Karl, Jurgen Paschold, Stefan Gropp, Anna Valeska Lohmann, Robert Lenz, Thomas Letzelter, Robert Heinz
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Publication number: 20080306312Abstract: Alkoxides are isolated by crystallization of an alcohol from a solution in the corresponding alcohol, with the alkoxide being crystallized out at a pressure of at least 3 bar abs. and a temperature of at least 120° C.Type: ApplicationFiled: December 13, 2006Publication date: December 11, 2008Applicant: BASF SEInventors: Bernd Eck, Matthias Rauls, Hermann Josef Feise, Thomas Letzelter, Josef Guth
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Patent number: 6683022Abstract: Method for the discontinuous thermal treatment of catalyst material comprising the steps (a) introducing the catalyst material into a reactor, (b) heating the catalyst material, (c) thermally treating the catalyst material in the reactor at the reactor temperature, (d) discharging the catalyst material from the reactor and (e) cooling the catalyst material, wherein the reactor temperature is kept constant during the steps (a) to (e), step (b) is carried out during and/or after step (a), step (e) is carried out during and/or after step (d), and step (c) is carried out after step (b) and before step (e). The method is used primarily for the calcination or activation of catalysts or catalyst supports which are used in polyolefin production.Type: GrantFiled: March 27, 2000Date of Patent: January 27, 2004Assignee: Basell Polyolefine GmbHInventors: Paulus De Lange, Michael Kämmerer, Thomas Brauch, Kaspar Evertz, Thomas Letzelter, Peter Kölle, Hans-Jacob Feindt
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Patent number: 6437198Abstract: The invention relates to a process for preparing alkali metal alkoxides by reacting alkali metals with alcohols in the presence of a catalyst, preferably a transition metal salt and especially iron(III) chloride.Type: GrantFiled: December 5, 2000Date of Patent: August 20, 2002Assignee: BASF AktiengesellschaftInventors: Holger Friedrich, Josef Guth, Jürgen Schweinzer, Thomas Letzelter, Hans-Jürgen Bender
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Patent number: 6281392Abstract: Orthoesters are prepared by reacting 1,1,1-trihaloalkanes with alkali metal alkoxides in the presence of the corresponding alcohol, a slurry of the alkali metal alkoxide in the corresponding alcohol being used.Type: GrantFiled: November 15, 1999Date of Patent: August 28, 2001Assignee: BASF AktiengesellschaftInventors: Kirsten Burkart, Josef Guth, Thomas Letzelter, Jürgen Schweinzer, Hans-Josef Sterzel
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Patent number: 5981798Abstract: A crystalline solid which has a sufficiently low hygroscopicity for processing and use and essentially consists of glycine-N,N-diacetic acid derivatives is prepared by adjusting the water content of the starting material containing the glycine-N,N-diacetic acid derivatives to a value of from 10 to 30% by weight, based on the starting material, and subsequently bringing about crystallization.Type: GrantFiled: November 5, 1997Date of Patent: November 9, 1999Assignee: BASF AktiengesellschaftInventors: Michael Schonherr, Matthias Rauls, Hermann Ascherl, Thomas Letzelter, Dieter Baumann, Birgit Potthoff-Karl