Patents by Inventor Kathrin Wissel-Stoll
Kathrin Wissel-Stoll 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: 20200123039Abstract: One aspect relates to a process for the preparation of a quartz glass body including: i.) providing a silicon dioxide granulate, ii.) making a first glass melt out of the silicon dioxide granulate, iii.) making a glass product out of at least one part of the glass melt, iv.) reducing the size of the glass product to obtain a quartz glass grain, v.) making a further glass melt from the quartz glass grain and vi.) making a quartz glass body out of at least one part of the further glass melt. Furthermore, one aspect relates to a quartz glass body obtainable by this process. Furthermore, one aspect relates to a reactor, which is obtainable by further processing of the quartz glass body.Type: ApplicationFiled: June 13, 2018Publication date: April 23, 2020Applicant: Heraeus Quarzglas GmbH & Co. KGInventors: Boris Gromann, Marcus Constantin Goebel, Nils Christian Nielsen, Michael Huenermann, Kathrin Wissel-Stoll
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Patent number: 10081580Abstract: The present invention relates to a process for preparing cyclohexane by isomerizing a hydrocarbon mixture (HM1) comprising methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. The starting material used is a stream (S1) which originates from a steamcracking process. The hydrocarbon mixture (HM1) obtained from this stream (S1) in an apparatus for aromatics removal has a reduced aromatics content compared to stream (S1), and (HM1) may optionally also be (virtually) free of aromatics. Depending on the type and amount of the aromatics remaining in the hydrocarbon mixture (HM1), especially in the case that benzene is present, the isomerization may additionally be preceded by performance of a hydrogenation of (HM1). In addition, depending on the presence of other components of (HM1), further purification steps may optionally be performed prior to or after the isomerization or hydrogenation.Type: GrantFiled: October 15, 2013Date of Patent: September 25, 2018Assignee: BASF SEInventors: Steffen Tschirschwitz, Kathrin Wissel-Stoll, Jochen Bürkle, Albena Kostova, Markus Schmitt, Veronika Wloka, Stephan Deuerlein, Marco Bosch, Steffen Oehlenschläger, Michael Schreiber, Gauthier Luc Maurice Averlant, Joni Joni, Roman Prochazka, Martin Bock, Alois Kindler, Daniela Malkowsky, Katharina Spuhl, Stefan Bitterlich, Daniel Pfeiffer
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Publication number: 20140114099Abstract: The present invention relates to a process for preparing cyclohexane by isomerizing a hydrocarbon mixture (HM1) comprising methylcyclopentane (MCP) in the presence of a catalyst. The catalyst is preferably an acidic ionic liquid. The starting material used is a stream (S1) which originates from a steamcracking process. The hydrocarbon mixture (HM1) obtained from this stream (S1) in an apparatus for aromatics removal has a reduced aromatics content compared to stream (S1), and (HM1) may optionally also be (virtually) free of aromatics. Depending on the type and amount of the aromatics remaining in the hydrocarbon mixture (HM1), especially in the case that benzene is present, the isomerization may additionally be preceded by performance of a hydrogenation of (HM1). In addition, depending on the presence of other components of (HM1), further purification steps may optionally be performed prior to or after the isomerization or hydrogenation.Type: ApplicationFiled: October 15, 2013Publication date: April 24, 2014Applicant: BASF SEInventors: Steffen Tschirschwitz, Kathrin Wissel-Stoll, Jochen Bürkle, Albena Kostova, Markus Schmitt, Veronika Wloka, Stephan Deuerlein, Marco Bosch, Steffen Oehlenschläger, Michael Schreiber, Gauthier Luc Maurice Averlant, Joni Joni, Roman Prochazka, Martin Bock, Alois Kindler, Daniela Malkowsky, Katharina Spuhl, Stefan Bitterlich, Daniel Pfeiffer
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Patent number: 8703992Abstract: Process for the preparation of aromatic and heteroaromatic carboxylic acids, carboxylic acid esters and carboxamides by the reaction of aromatic or heteroaromatic halides R—Xn, in which n=integer from 1 to 6, R=substituted or unsubstituted and aromatic or heteroaromatic radical and X=chlorine, bromine or iodine atom, with carbon monoxide and water, ammonia, alcohols or amines in the presence of bases and zero-valent or divalent palladium compounds and bidentate diphosphanes or complexes of zero-valent or divalent palladium with bidentate diphosphanes, in which use is made of bidentate diphosphanes (R1—)(R2—)P—Y—P(—R3)(—R4) in which R1 to R4=unsubstituted aryl radicals or aryl radicals substituted with at least one radical exhibiting a positive resonance effect or a positive inductive effect, or unsubstituted or substituted cycloalkyl radicals, and Y=hydrocarbon group with a total of 2 to 20 carbon atoms, in which at least one of the carbon atoms carries only one or no hydrogen atom as substituent; except foType: GrantFiled: May 25, 2009Date of Patent: April 22, 2014Assignee: BASF SEInventors: Nina Challand, Ansgar Gereon Altenhoff, Joachim Schmidt-Leithoff, Kathrin Wissel-Stoll, Michael Rack, Joachim Rheinheimer
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Patent number: 8586794Abstract: The present invention relates to 5-isopropyl-3-aminomethyl-2-methyl-1-aminocyclohexane (carvonediamine) and to a process for preparation thereof by a) reacting carvone with hydrogen cyanide, b) then reacting the carvonenitrile obtained in stage a) with ammonia in the presence of an imine formation catalyst and c) then reacting the carvonenitrile imine-containing reaction mixture obtained in stage b) with hydrogen and ammonia over hydrogenation catalysts. The present invention further relates to the use of carvonediamine as a hardener for epoxy resins, as an intermediate in the preparation of diisocyanates, as a starter in the preparation of polyetherols and/or as a monomer for polyamide preparation.Type: GrantFiled: July 13, 2009Date of Patent: November 19, 2013Assignee: BASF SEInventors: Martin Ernst, Alfred Oftring, Kathrin Wissel-Stoll, Oemer Uensal, Stephan Freyer, Ansgar Gereon Altenhoff, Wolfgang Staffel
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Patent number: 8461390Abstract: A process for preparing substituted biphenyls of the formula I where R1=nitro or amino, R2=cyano, halogen, C1-C4-haloalkyl, C1-C4-haloalkoxy or C1-C4-haloalkylthio, n=from 0 to 3, and R3=hydrogen, cyano or halogen, which comprises reacting a halobenzene of the formula II in which Hal is chlorine or bromine, in the presence of a base and of a palladium catalyst which consists of palladium and a bidentate phosphorus ligand of the formula III where Ar is phenyl which is substituted if desired and R4 and R5 are each C1-C8-alkyl or C3-C6-cycloalkyl or together form a 2- to 7-membered bridge which may, if desired, bear a C1-C6-alkyl substituent, in a solvent or diluent, with a phenylboronic acid IVa a diphenylborinic acid IVb or a mixture of IVa and IVb.Type: GrantFiled: June 22, 2009Date of Patent: June 11, 2013Assignee: BASF SEInventors: Sebastian Peer Smidt, Volker Maywald, Kathrin Wissel-Stoll, Joachim Schmidt-Leithoff, Ansgar Gereon Altenhoff, Michael Keil
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Publication number: 20110172456Abstract: Process for the preparation of aromatic and heteroaromatic carboxylic acids, carboxylic acid esters and carboxamides by the reaction of aromatic or heteroaromatic halides R—Xn, in which n=integer from 1 to 6, R=substituted or unsubstituted and aromatic or heteroaromatic radical and X=chlorine, bromine or iodine atom, with carbon monoxide and water, ammonia, alcohols or amines in the presence of bases and zero-valent or divalent palladium compounds and bidentate diphosphanes or complexes of zero-valent or divalent palladium with bidentate diphosphanes, in which use is made of bidentate diphosphanes (R1—)(R2—)P—Y—P(—R3)(—R4) in which R1 to R4=unsubstituted aryl radicals or aryl radicals substituted with at least one radical exhibiting a positive resonance effect or a positive inductive effect, or unsubstituted or substituted cycloalkyl radicals, and Y=hydrocarbon group with a total of 2 to 20 carbon atoms, in which at least one of the carbon atoms carries only one or no hydrogen atom as substituent; except fType: ApplicationFiled: May 25, 2009Publication date: July 14, 2011Applicant: BASF SEInventors: Nina Challand, Ansgar Gereon Altenhoff, Joachim Schmidt-Leithoff, Kathrin Wissel-Stoll, Michael Rack, Joachim Rheinheimer
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Publication number: 20110137098Abstract: A process for isomerizing a saturated hydrocarbon, by performing the isomerization in the presence of a superacidic ionic liquid comprising an organic cation and an inorganic anion, where the anion is a superacidic aluminum trichloride-Lewis base adduct, and of an olefin.Type: ApplicationFiled: December 6, 2010Publication date: June 9, 2011Applicant: BASF SEInventors: STEFFEN TSCHIRSCHWITZ, Stephan Deuerlein, Jochen Bürkle, Markus Schmitt, Steffen Oehlenschläger, Kathrin Wissel-Stoll, Veronika Wloka
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Publication number: 20110124918Abstract: The present invention relates to 5-isopropyl-3-aminomethyl-2-methyl-1-aminocyclohexane (carvonediamine) and to a process for preparation thereof by a) reacting carvone with hydrogen cyanide, b) then reacting the carvonenitrile obtained in stage a) with ammonia in the presence of an imine formation catalyst and c) then reacting the carvonenitrile imine-containing reaction mixture obtained in stage b) with hydrogen and ammonia over hydrogenation catalysts. The present invention further relates to the use of carvonediamine as a hardener for epoxy resins, as an intermediate in the preparation of diisocyanates, as a starter in the preparation of polyetherols and/or as a monomer for polyamide preparation.Type: ApplicationFiled: July 13, 2009Publication date: May 26, 2011Applicant: BASF SEInventors: Martin Ernst, Alfred Oftring, Kathrin Wissel-Stoll, Oemer Uensal, Stephan Freyer, Ansgar Gereon Altenhoff, Wolfgang Staffel
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Publication number: 20110105766Abstract: A process for preparing substituted biphenyls of the formula I where R1=nitro or amino, R2=cyano, halogen, C1-C4-haloalkyl, C1-C4-haloalkoxy or C1-C4-haloalkylthio, n=from 0 to 3, and R3=hydrogen, cyano or halogen, which comprises reacting a halobenzene of the formula II in which Hal is chlorine or bromine, in the presence of a base and of a palladium catalyst which consists of palladium and a bidentate phosphorus ligand of the formula III where Ar is phenyl which is substituted if desired and R4 and R5 are each C1-C8-alkyl or C3-C6-cycloalkyl or together form a 2- to 7-membered bridge which may, if desired, bear a C1-C6-alkyl substituent, in a solvent or diluent, with a phenylboronic acid IVa a diphenylborinic acid IVb or a mixture of IVa and IVb.Type: ApplicationFiled: June 22, 2009Publication date: May 5, 2011Applicant: BASF SEInventors: Sebastian Peer Smidt, Volker Maywald, Kathrin Wissel-Stoll, Joachim Schmidt-Leithoff, Ansgar Gereon Altenhoff, Michael Keil