Patents by Inventor Thomas Holtmann
Thomas Holtmann 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: 11926639Abstract: A process for preparing oligo ethylene glycol methyl ether borate involves feeding boric acid and oligo ethylene glycol monomethyl ether into a reactor, and reacting to obtain a raw product containing oligo ethylene glycol methyl ether borate, water, and unreacted boric acid and oligo ethylene glycol monomethyl ether. The raw product is fed to a reactive distillation device and boric acid is reacted with oligo ethylene glycmonomethyl ether for full conversion of boric acid. A distillate stream containing water is transferred from the top of the reactive distillation device to a condenser, and a condensed liquid stream is recycled to the top of the reactive distillation device. A bottom product stream containing oligo ethylene glycol methyl ether borate is withdrawn from the reactive distillation device. The bottom product stream is partially recycled to a reboiler. The resulting vapor stream is recycled to the bottom of the reactive distillation device.Type: GrantFiled: November 19, 2020Date of Patent: March 12, 2024Assignee: BASF SEInventors: Kathrin Luise Mariethres Werth, Thomas Holtmann, Rainer Papp, Mirko Haider, Joachim Wulff-Doering
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Publication number: 20230002421Abstract: A process for preparing oligo ethylene glycol methyl ether borate involves feeding boric acid and oligo ethylene glycol monomethyl ether into a reactor, and reacting to obtain a raw product containing oligo ethylene glycol methyl ether borate, water, and unreacted boric acid and oligo ethylene glycol monomethyl ether. The raw product is fed to a reactive distillation device and boric acid is reacted with oligo ethylene glycmonomethyl ether for full conversion of boric acid. A distillate stream containing water is transferred from the top of the reactive distillation device to a condenser, and a condensed liquid stream is recycled to the top of the reactive distillation device. A bottom product stream containing oligo ethylene glycol methyl ether borate is withdrawn from the reactive distillation device. The bottom product stream is partially recycled to a reboiler. The resulting vapor stream is recycled to the bottom of the reactive distillation device.Type: ApplicationFiled: November 19, 2020Publication date: January 5, 2023Applicant: BASF SEInventors: Kathrin Luise Mariethres WERTH, Thomas Holtmann, Rainer Papp, Mirko Haider, Joachim Wulff-Doering
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Publication number: 20200009535Abstract: The invention relates to a silver-comprising catalyst system for the preparation of aldehydes and/or ketones by oxidative dehydrogenation of alcohols, in particular the oxidative dehydrogenation of methanol to form formaldehyde, comprising a first catalyst layer and a second catalyst layer, wherein the first catalyst layer consists of a silver-comprising material in the form of balls of wire, gauzes or knitteds having a weight per unit area of from 0.3 to 10 kg/m2 and a wire diameter of from 30 to 200 ?m and the second catalyst layer consists of a silver-comprising material in the form of granular material having an average particle size of from 0.5 to 5 mm and the two catalyst layers are in direct contact with one another. The invention further relates to a corresponding process for the preparation of aldehydes and/or ketones, in particular of formaldehyde, by oxidative dehydrogenation of corresponding alcohols over a silver-comprising catalyst system.Type: ApplicationFiled: February 14, 2018Publication date: January 9, 2020Inventors: Ekaterina TROUSSARD, Roman Daniel PILZ, Emil ROETH, Marco BOSCH, Susanne WEBER, Peter LOECHER, Daniel PFEIFFER, Thomas HOLTMANN
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Publication number: 20170037545Abstract: A method and a device for spreading a fiber strand to provide a strip-type fiber strand. In particular, the initial fiber strand is provided with an initial width and thickness, and is then spread to form the strip-type fiber strand having a greater final width and a smaller final thickness as compared to the initial width and thickness. The fiber strand consists of continuous multifilament fibers.Type: ApplicationFiled: March 18, 2015Publication date: February 9, 2017Inventors: Jürgen Keppel, Andy Rakovac, Thomas Holtmann
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Patent number: 8030485Abstract: The invention relates to a process for preparing free-flowing, pulverulent alkoxycarbonylaminotriazine from an alkanolic reaction mixture which is obtained in the preparation of alkoxycarbonylaminotriazines and comprises at least one alkoxycarbonylaminotriazine, at least one cyclic and/or acyclic carbonic ester, at least one C1-C13-alkanol which optionally comprises one or two oxygen atoms in the form of ether bonds and is optionally substituted by C1-C4-alkyl and/or hydroxyl, and also at least one alkali metal or alkaline earth metal alkoxide, with or without melamine and with or without catalyst, by atomizing and drying the reaction mixture in a spray drier.Type: GrantFiled: May 31, 2006Date of Patent: October 4, 2011Assignee: BASF AktiengesellschaftInventors: Joerg Schneider, Guenter Scherr, Rainer Erhardt, Andreas Eichfelder, Martin Reif, Stefan Hirsch, Georg Sieder, Thomas Holtmann, Juergen Ciprian, Hermann Ascherl
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Patent number: 7750194Abstract: A process for preparing alkanols (I) selected from the group consisting of isopropanol and 2-butanol from the corresponding alkanes (II) selected from the group consisting of propane and n-butane, comprising the steps of: A) providing a starting gas stream a comprising the alkane (II); B) feeding the starting gas stream a comprising the alkane (II) into a dehydrogenation zone and subjecting the alkane (II) to a dehydrogenation to the alkene (III) to obtain a product gas stream b comprising the alkene (III) and unconverted alkane (II), with or without high boilers, steam, hydrogen and low boilers; C) at least compressing product gas stream b, optionally separating product gas stream b into an aqueous phase c1, a phase c2 comprising the alkene (III) and the alkane (II), with or without high boilers, and a gas phase c3 comprising hydrogen and low boilers; D) reacting product gas stream b or the phase c2 comprising alkene (III) and alkane (II) with an organic acid (IV) in an esterification zone to obtain a produType: GrantFiled: July 16, 2007Date of Patent: July 6, 2010Assignee: BASF AktiengesellschaftInventors: Georg Degen, Sven Crone, Ralf Boehling, Ansgar Gereon Altenhoff, Wolfgang Rohde, Jochen Buerkle, Goetz-Peter Schindler, Thomas Holtmann, Markus Schmitt
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Publication number: 20100048960Abstract: A process for preparing alkanols (I) selected from the group consisting of isopropanol and 2-butanol from the corresponding alkanes (II) selected from the group consisting of propane and n-butane, comprising the steps of: A) providing a starting gas stream a comprising the alkane (II); B) feeding the starting gas stream a comprising the alkane (II) into a dehydrogenation zone and subjecting the alkane (II) to a dehydrogenation to the alkene (III) to obtain a product gas stream b comprising the alkene (III) and unconverted alkane (II), with or without high boilers, steam, hydrogen and low boilers; C) at least compressing product gas stream b, optionally separating product gas stream b into an aqueous phase c1, a phase c2 comprising the alkene (III) and the alkane (II), with or without high boilers, and a gas phase c3 comprising hydrogen and low boilers; D) reacting product gas stream b or the phase c2 comprising alkene (III) and alkane (II) with an organic acid (IV) in an esterification zone to obtain a produType: ApplicationFiled: July 16, 2007Publication date: February 25, 2010Applicant: BASF AktiengesellschaftInventors: Georg Degen, Sven Crone, Ralf Boehling, Ansgar Gereon Altenhoff, Wolfgang Rohde, Jochen Buerkle, Goetz-Peter Schindler, Thomas Holtmann, Markus Schmitt
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Publication number: 20080306261Abstract: Processes comprising: providing an alkanolic reaction mixture, the alkanolic reaction mixture comprising: at least one alkoxycarbonylaminotriazine; at least one carbonic ester; at least one C1-C13-alkanol, which alkanol may further comprise up to two ether-bound oxygen atoms and may further comprise a substituent selected from the group consisting of C1-C4-alkyls and hydroxyls; and at least one alkali metal alkoxide or alkaline earth metal alkoxide; and subjecting the alkanolic reaction mixture to extraction with a polar extractant such that at least a portion of polar/ionic components present in the reaction mixture are removed, wherein the polar extractant is less than entirely miscible with an organic phase of the reaction mixture, to form an alkanolic phase comprising the at least one alkoxycarbonylaminotriazine and a polar phase comprising the polar extractant and the portion of polar/ionic components; and wherein the extraction is carried out with one or more selected from the group consisting of mixer/Type: ApplicationFiled: June 2, 2006Publication date: December 11, 2008Applicant: BASF AktiengesellschaftInventors: Jörg Schneider, Gunter Scherr, Rainer Erhardt, Andreas Eichfelder, Martin Reif, Stefan Hirsch, Georg Sieder, Thomas Holtmann, Jurgen Ciprian, Hermann Ascherl
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Publication number: 20080275236Abstract: The invention relates to a process for removing salts from an alkanolic reaction mixture which is obtained in the preparation of alkoxycarbonylaminotriazines and comprises at least one alkoxycarbonylaminotriazine, at least one cyclic and/or acyclic carbonic ester, at least one C1-C13-alkanol which optionally comprises one or two oxygen atoms as ether bonds and is optionally substituted by C1-C4-alkyl and/or hydroxyl, and also at least one alkali metal alkoxide or alkaline earth metal alkoxide, with or without melamine and with or without catalyst, in which salts are removed from the reaction mixture by ion exchange over a cation exchanger and/or anion exchanger.Type: ApplicationFiled: June 1, 2006Publication date: November 6, 2008Applicant: BASF AKTIENGESELLSCHAFTInventors: Jorg Schneider, Gunter Scherr, Rainer Erhardt, Andreas Eichfelder, Martin Reif, Stefan Hirsch, Georg Sieder, Thomas Holtmann, Juergen Ciprian, Hermann Ascherl
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Publication number: 20080207901Abstract: The invention relates to a process for preparing free-flowing, pulverulent alkoxycarbonylaminotriazine from an alkanolic reaction mixture which is obtained in the preparation of alkoxycarbonylaminotriazines and comprises at least one alkoxycarbonylaminotriazine, at least one cyclic and/or acyclic carbonic ester, at least one C1-C13-alkanol which optionally comprises one or two oxygen atoms in the form of ether bonds and is optionally substituted by C1-C4-alkyl and/or hydroxyl, and also at least one alkali metal or alkaline earth metal alkoxide, with or without melamine and with or without catalyst, by atomizing and drying the reaction mixture in a spray drier.Type: ApplicationFiled: May 31, 2006Publication date: August 28, 2008Applicant: BASF AktiengesellschaftInventors: Joerg Schneider, Gunter Scherr, Rainer Erhardt, Andreas Eichfelder, Martin Reif, Stefan Hirsch, Georg Sieder, Thomas Holtmann, Jurgen Ciprian, Hermann Ascherl