Patents by Inventor Eike Johannes Bergner
Eike Johannes Bergner 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: 9988331Abstract: The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method has the following steps a.1) catalytic hydrogenation of neral and/or geranial to give citronellal, b.1) cyclization of citronellal to isopulegol in the presence of an acidic catalyst, c.1) purification of isopulegol by crystallization and d.1) catalytic hydrogenation of isopulegol to give menthol.Type: GrantFiled: October 23, 2012Date of Patent: June 5, 2018Assignee: BASF SEInventors: Gunnar Heydrich, Gabriele Gralla, Matthias Rauls, Joachim Schmidt-Leithoff, Klaus Ebel, Wolfgang Krause, Steffen Oehlenschläger, Christoph Jäkel, Marko Friedrich, Eike Johannes Bergner, Nawid Kashani-Shirazi, Rocco Paciello
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Publication number: 20130046118Abstract: The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method comprises the following steps a.1) catalytic hydrogenation of neral and/or geranial to give citronellal, b.1) cyclization of citronellal to isopulegol in the presence of an acidic catalyst, c.1) purification of isopulegol by crystallization and d.1) catalytic hydrogenation of isopulegol to give menthol.Type: ApplicationFiled: October 23, 2012Publication date: February 21, 2013Applicant: BASF SEInventors: Gunnar Heydrich, Gabriele Gralla, Matthias Rauls, Joachim Schmidt-Leithoff, Klaus Ebel, Wolfgang Krause, Steffen Oehlenschläger, Christoph Jäkel, Marko Friedrich, Eike Johannes Bergner, Nawid Kashani-Shirazi, Rocco Paciello
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Patent number: 8318985Abstract: The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method comprises the following steps a) catalytic hydrogenation of neral and/or geranial to give citronellal, b) cyclization of citronellal to isopulegol in the presence of an acidic catalyst, c) purification of isopulegol by crystallization and d) catalytic hydrogenation of isopulegol to give menthol.Type: GrantFiled: November 13, 2008Date of Patent: November 27, 2012Assignee: BASF SEInventors: Gunnar Heydrich, Gabriele Gralla, Matthias Rauls, Joachim Schmidt-Leithoff, Klaus Ebel, Wolfgang Krause, Steffen Oehlenschläger, Christoph Jäkal, Marko Friedrich, Eike Johannes Bergner, Nawid Kashani-Shirazi, Rocco Paciello
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Patent number: 7960593Abstract: The present invention relates to a process for preparing racemic or optically active menthol by catalytically hydrogenating racemic or optically active isopulegol in the presence of hydrogen and catalysts which comprise nickel-, copper-, zirconium- and molybdenum-containing compounds. The present invention relates specifically to a corresponding process far continuously catalytically hydrogenating L-isopulegol to L-menthol.Type: GrantFiled: July 16, 2008Date of Patent: June 14, 2011Assignee: BASF SEInventors: Gabriele Gralla, Gunnar Heydrich, Eike Johannes Bergner, Klaus Ebel
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Publication number: 20100249467Abstract: The present invention relates to a particularly economic overall method for producing menthol, specifically for producing optically active, essentially enantiomerically and diastereomerically pure L-menthol and racemic menthol, starting from the starting material citral which is available inexpensively on an industrial scale. The method comprises the following steps a.1) catalytic hydrogenation of neral and/or geranial to give citronellal, b.1) cyclization of citronellal to isopulegol in the presence of an acidic catalyst, c.1) purification of isopulegol by crystallization and d.1) catalytic hydrogenation of isopulegol to give menthol.Type: ApplicationFiled: November 13, 2008Publication date: September 30, 2010Applicant: BASF SEInventors: Gunnar Heydrich, Gabriele Gralla, Matthias Rauls, Joachim Schmidt-Leithoff, Klaus Ebel, Wolfgang Krause, Steffen Oehlenschläger, Christoph Jäkel, Marko Friedrich, Eike Johannes Bergner, Nawid Kashani-Shirazi, Rocco Paciello
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Publication number: 20100191021Abstract: The present invention relates to a process for preparing racemic or optically active menthol by catalytically hydrogenating racemic or optically active isopulegol in the presence of hydrogen and catalysts which comprise nickel-, copper-, zirconium- and molybdenum-containing compounds. The present invention relates specifically to a corresponding process far continuously catalytically hydrogenating L-isopulegol to L-menthol.Type: ApplicationFiled: July 16, 2008Publication date: July 29, 2010Applicant: BASF SEInventors: Gabriele Gralla, Gunnar Heydrich, Eike Johannes Bergner, Klaus Ebel
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Patent number: 7709688Abstract: Processes comprising: (a) enantioselectively hydrogenating a staffing material comprising a component selected from geraniol, nerol and mixtures thereof to form optically active citronellol; (b) converting the optically active citronellol to optically active citronellal; (c) cyclizing the optically active citronellal to form a mixture comprising optically active isopulegol; and (d) subjecting the mixture to further processing comprising: (i) separating the optically active isopulegol from the mixture and hydrogenating the separated optically active isopulegol to form optically active menthol; or (ii) hydrogenating the optically active isopulegol in the mixture to form optically active menthol and separating the optically active menthol from the mixture.Type: GrantFiled: November 24, 2005Date of Patent: May 4, 2010Assignee: BASF SEInventors: Eike Johannes Bergner, Klaus Ebel, Thorsten Johann, Oliver Löber
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Patent number: 7468463Abstract: The present invention relates to a process for preparing optically active aldehydes or ketones which have from 3 to 25 carbon atoms and at least one racemizable stereocenter by catalytic dehydrogenation of the corresponding optically active primary or secondary alcohols in the gas phase in the presence of a catalyst.Type: GrantFiled: March 4, 2005Date of Patent: December 23, 2008Assignee: BASF AGInventors: Thorsten Johann, Oliver Löber, Eike Johannes Bergner, Klaus Ebel, Klaus Harth, Christian Walsdorff
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Publication number: 20080139852Abstract: Processes comprising: (a) enantioselectively hydrogenating a starting material comprising a component selected from geraniol, nerol and mixtures thereof to form optically active citronellol; (b) converting the optically active citronellol to optically active citronellal; (c) cyclizing the optically active citronellal to form a mixture comprising optically active isopulegol; and (d) subjecting the mixture to further processing comprising: (i) separating the optically active isopulegol from the mixture and hydrogenating the separated optically active isopulegol to form optically active menthol; or (ii) hydrogenating the optically active isopulegol in the mixture to form optically active menthol and separating the optically active menthol from the mixture.Type: ApplicationFiled: November 24, 2005Publication date: June 12, 2008Applicant: BASF AktiengesellschaftInventors: Eike Johannes Bergner, Klaus Ebel, Thorsten Johann, Oliver Lober
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Patent number: 7319161Abstract: The invention relates to a process for preparing cyclohexanedicarboxylic acids or derivatives thereof, such as esters and/or anhydrides, encompassing the reaction of diene/maleic acid anhydride mixtures, in particular of butadiene/maleic acid anhydride mixtures or of mixtures of maleic acid anhydrides and C5-dienes to give alkyl-substituted or unsubstituted cyclohexenedicarboxylic acid anhydrides in the condensed phase, ester formation, and then hydrogenation to give the corresponding cyclohexanedicarboxylic acid derivative, and also to the use of the cyclohexanedicarboxylic acids or derivatives thereof prepared according to the invention as plasticizers for plastics.Type: GrantFiled: February 15, 2002Date of Patent: January 15, 2008Assignee: BASF AktiengesellschaftInventors: Ralf Noe, Hartmut Hibst, Klaus Halbritter, Melanie Maas-Brunner, Boris Breitscheidel, Gerd Kaibel, Klemens Massonne, Axel Salden, Klaus Ebel, Eike Johannes Bergner, Frank Haese
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Publication number: 20040054220Abstract: The invention relates to a process for preparing cyclohexanedicarboxylic acids or derivatives thereof, such as esters and/or anhydrides, encompassing the reaction of diene/maleic acid anhydride mixtures, in particular of butadiene/maleic acid anhydride mixtures or of mixtures of maleic acid anhydrides and C5-dienes to give alkyl-substituted or unsubstituted cyclohexenedicarboxylic acid anhydrides in the condensed phase, ester formation, and then hydrogenation to give the corresponding cyclohexanedicarboxylic acid derivative, and also to the use of the cyclohexanedicarboxylic acids or derivatives thereof prepared according to the invention as plasticizers for plastics.Type: ApplicationFiled: August 6, 2003Publication date: March 18, 2004Inventors: Ralf Noe, Hartmut Hibst, Klaus Halbritter, Melanie Maas-Brunner, Boris Breitscheidel, Gerd Kaibel, Klemens Massonne, Axel Salden, Klaus Ebel, Eike Johannes Bergner, Frank Haese
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Publication number: 20030100790Abstract: The invention relates to a process for preparing N-formylamino carboxylic esters by reacting amino carboxylic acids with formic esters.Type: ApplicationFiled: October 29, 2002Publication date: May 29, 2003Inventors: Alexander Wartini, Eike Johannes Bergner, Klaus Ebel