Patents by Inventor Hans-Martin Allmann
Hans-Martin Allmann 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: 10710054Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA) comprising at least four catalyst zones arranged in succession in the reaction tube and filled with catalysts of different chemical composition wherein the active material of the catalysts comprise vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the reactor outlet has an antimony content (calculated as antimony trioxide) between 0.7 to 3.0 wt. %.Type: GrantFiled: January 14, 2016Date of Patent: July 14, 2020Assignee: BASF SEInventors: Diana Carolina Galeano Nunez, Christian Walsdorff, Jürgen Zühlke, Hans-Martin Allmann
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Patent number: 9914716Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which has been produced using antimony trioxide consisting predominantly of the senarmontite modification of which all primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide consisting predominantly of the senarmontite modification with a median primary crystallite size of less than 200 nm.Type: GrantFiled: February 17, 2015Date of Patent: March 13, 2018Assignee: BASF SEInventors: Diana C. Galeano Nunez, Christian Walsdorff, Jürgen Zühlke, Hans-Martin Allmann
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Patent number: 9868713Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which have been produced using antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm.Type: GrantFiled: February 17, 2015Date of Patent: January 16, 2018Assignee: BASF SEInventors: Nico F. Fischer, Diana C. Galeano Nunez, Michael Krämer, Markus Schubert, Jürgen Zühlke, Hans-Martin Allmann
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Publication number: 20180008962Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA) comprising at least four catalyst zones arranged in succession in the reaction tube and filled with catalysts of different chemical composition wherein the active material of the catalysts comprise vanadium and titanium dioxide and the active material of the catalyst in the last catalyst zone towards the reactor outlet has an antimony content (calculated as antimony trioxide) between 0.7 to 3.0 wt. %.Type: ApplicationFiled: January 14, 2016Publication date: January 11, 2018Inventors: DIANA CAROLINA GALEANO NUNEZ, Christian WALSDORFF, Jurgen ZQHLKE, Hans-Martin ALLMANN
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Patent number: 9765046Abstract: The present invention relates to a process for preparing phthalic anhydride by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a thermostatted catalyst and the supply of the at least one aromatic hydrocarbon to the catalyst is temporarily interrupted after putting the catalyst on stream.Type: GrantFiled: June 16, 2014Date of Patent: September 19, 2017Assignee: BASF SEInventors: Nico F. Fischer, Michael Krämer, Jürgen Zühlke, Hans-Martin Allmann
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Patent number: 9656983Abstract: A process for preparing carboxylic acids and/or carboxylic anhydrides by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a catalyst thermostatted by a heat carrier medium, which comprises keeping the temperature of the heat carrier medium constant during the startup of the reactor for at least 24 hours, during which neither the loading of the gas stream with hydrocarbons nor the gas stream volume is increased by more than 3%.Type: GrantFiled: June 16, 2014Date of Patent: May 23, 2017Assignee: BASF SEInventors: Michael Krämer, Nico F. Fischer, Jürgen Zühlke, Hans-Martin Allmann
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Publication number: 20170008866Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which have been produced using antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide comprising a noticeable proportion of senarmontite wherein some of the primary crystallites have a size of less than 200 nm.Type: ApplicationFiled: February 17, 2015Publication date: January 12, 2017Inventors: Nico F. FISCHER, Diana C. GALEANO NUNEZ, Michael KRÄMER, Markus SCHUBERT, Jürgen ZÜHLKE, Hans-Martin ALLMANN
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Publication number: 20170008867Abstract: The present invention relates to a catalyst system for oxidation of o-xylene and/or naphthalene to phthalic anhydride (PA), comprising a plurality of catalyst zones arranged in succession in the reaction tube, which has been produced using antimony trioxide consisting predominantly of the senarmontite modification of which all primary crystallites have a size of less than 200 nm. The present invention further relates to a process for gas phase oxidation, in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst system which comprises a plurality of catalyst zones arranged in succession in the reaction tube and which has been produced using an antimony trioxide consisting predominantly of the senarmontite modification with a median primary crystallite size of less than 200 nm.Type: ApplicationFiled: February 17, 2015Publication date: January 12, 2017Inventors: Diana C. GALEANO NUNEZ, Christian WALSDORFF, Jürgen ZÜHLKE, Hans-Martin ALLMANN
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Publication number: 20160152586Abstract: A process for preparing carboxylic acids and/or carboxylic anhydrides by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a catalyst thermostatted by a heat carrier medium, which comprises keeping the temperature of the heat carrier medium constant during the startup of the reactor for at least 24 hours, during which neither the loading of the gas stream with hydrocarbons nor the gas stream volume is increased by more than 3%.Type: ApplicationFiled: June 16, 2014Publication date: June 2, 2016Applicant: BASF SEInventors: Michael KRÄMER, Nico F. FISCHER, Jürgen ZÜHLKE, Hans-Martin ALLMANN
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Publication number: 20160145226Abstract: The present invention relates to a process for preparing phthalic anhydride by gas phase oxidation of aromatic hydrocarbons, in which a gas stream comprising at least one aromatic hydrocarbon and molecular oxygen is passed continuously over a thermostatted catalyst and the supply of the at least one aromatic hydrocarbon to the catalyst is temporarily interrupted after putting the catalyst on stream.Type: ApplicationFiled: June 16, 2014Publication date: May 26, 2016Inventors: Nico F. FISCHER, Michael KRÄMER, Jürgen ZÜHLKE, Hans-Martin ALLMANN
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Patent number: 9067187Abstract: The present invention relates to a process for gas-phase oxidation, in which a gaseous stream comprising an aromatic hydrocarbon and molecular oxygen is passed through two or more catalyst zones. Furthermore, the present invention relates to a catalyst system for gas-phase reaction using a preliminary zone.Type: GrantFiled: August 16, 2012Date of Patent: June 30, 2015Assignee: BASF SEInventors: Hagen Wilmer, Jürgen Zühlke, Thomas Lautensack, Hans-Martin Allmann, Frank Rosowski, Cornelia Dobner
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Patent number: 9029289Abstract: The present invention relates to a catalyst for preparing carboxylic acids and/or carboxylic anhydrides, which has a plurality of catalyst zones arranged in series and has been produced using a vanadium antimonate having a maximum content of crystalline valentinite of 5% by weight. The present invention further relates to a process for gas-phase oxidation in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst which has a plurality of catalyst zones arranged in series and has been produced using a vanadium antimonate having a maximum content of crystalline valentinite of 5% by weight.Type: GrantFiled: July 16, 2013Date of Patent: May 12, 2015Assignee: BASF SEInventors: Michael Krämer, Jürgen Zühlke, Stefan Altwasser, Nico Frederik Fischer, Frank Rosowski, Hans-Martin Allmann
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Patent number: 8859459Abstract: The present invention relates to a multilayer catalyst for preparing phthalic anhydride which has a plurality of catalyst layers arranged in succession in the reaction tube, with the individual catalyst layers having alkali metal contents which decrease in the flow direction. The present invention further relates to a process for the oxidation of naphthalene or o-xylene/naphthalene mixtures over such a multilayer catalyst and the use of such multilayer catalysts for the oxidation of naphthalene or o-xylene/naphthalene mixtures to phthalic anhydride.Type: GrantFiled: June 30, 2011Date of Patent: October 14, 2014Assignee: BASF SEInventors: Stefan Altwasser, Jürgen Zühlke, Hans-Martin Allmann, Frank Rosowski
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Publication number: 20140018550Abstract: The present invention relates to a catalyst for preparing carboxylic acids and/or carboxylic anhydrides, which has a plurality of catalyst zones arranged in series and has been produced using a vanadium antimonate having a maximum content of crystalline valentinite of 5% by weight. The present invention further relates to a process for gas-phase oxidation in which a gas stream comprising at least one hydrocarbon and molecular oxygen is passed through a catalyst which has a plurality of catalyst zones arranged in series and has been produced using a vanadium antimonate having a maximum content of crystalline valentinite of 5% by weight.Type: ApplicationFiled: July 16, 2013Publication date: January 16, 2014Inventors: Michael Krämer, Jürgen Zühlke, Stefan Altwasser, Nico Frederik Fischer, Frank Rosowski, Hans-Martin Allmann
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Patent number: 8492566Abstract: What is described is a process for starting up a gas phase oxidation reactor for oxidation of o-xylene to phthalic anhydride, said reactor comprising at least one catalyst layer and being temperature-controllable by means of a heat carrier medium, wherein a) the catalyst layer is interrupted by a moderator layer which is less catalytically active than the catalyst layer or is catalytically inactive, b) a gas stream is passed through the reactor with an initial loading of o-xylene and at an initial temperature of the heat transfer medium, c) the loading of the gas stream is increased to a target loading and, in parallel, the temperature of the heat transfer medium is lowered to an operating temperature. The introduction of the moderator layer allows the loading to be increased more rapidly and the startup time to be shortened.Type: GrantFiled: April 7, 2009Date of Patent: July 23, 2013Assignee: BASF SEInventors: Hagen Wilmer, Jürgen Zühlke, Thomas Lautensack, Hans-Martin Allmann, Frank Rosowski, Cornelia Katharina Dobner
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Publication number: 20130039821Abstract: The present invention relates to a process for gas-phase oxidation, in which a gaseous stream comprising an aromatic hydrocarbon and molecular oxygen is passed through two or more catalyst zones. Furthermore, the present invention relates to a catalyst system for gas-phase reaction using a preliminary zone.Type: ApplicationFiled: August 16, 2012Publication date: February 14, 2013Applicant: BASF SE*Inventors: Hagen Wilmer, Jürgen Zühlke, Thomas Lautensack, Hans-Martin Allmann, Frank Rosowski, Cornelia Dobner
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Patent number: 8263789Abstract: The present invention relates to a process for gas-phase oxidation, in which a gaseous stream comprising an aromatic hydrocarbon and molecular oxygen is passed through two or more catalyst zones. Furthermore, the present invention relates to a catalyst system for gas-phase reaction using a preliminary zone.Type: GrantFiled: December 12, 2007Date of Patent: September 11, 2012Assignee: BASF SEInventors: Hagen Wilmer, Jürgen Zühlke, Thomas Lautensack, Hans-Martin Allmann, Frank Rosowski, Cornelia Dobner
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Publication number: 20120004425Abstract: The present invention relates to a multilayer catalyst for preparing phthalic anhydride which has a plurality of catalyst layers arranged in succession in the reaction tube, with the individual catalyst layers having alkali metal contents which decrease in the flow direction. The present invention further relates to a process for the oxidation of naphthalene or o-xylene/naphthalene mixtures over such a multilayer catalyst and the use of such multilayer catalysts for the oxidation of naphthalene or o-xylene/naphthalene mixtures to phthalic anhydride.Type: ApplicationFiled: June 30, 2011Publication date: January 5, 2012Applicant: BASF SEInventors: Stefan Altwasser, Jürgen Zühlke, Hans-Martin Allmann, Frank Rosowski
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Patent number: 8067618Abstract: A process for gas phase oxidation in which a gaseous stream which comprises at least one aromatic hydrocarbon and molecular oxygen is passed through one or more catalyst layers, wherein a moderator layer is arranged between two catalyst layers arranged in succession in flow direction of the gaseous stream, the moderator layer being less catalytically active than the catalysts adjacent upstream and downstream or being catalytically inactive. The desired oxidation products are obtained in high yield over prolonged periods.Type: GrantFiled: April 27, 2007Date of Patent: November 29, 2011Assignee: BASF SEInventors: Thomas Lautensack, Hans-Martin Allmann, Hagen Wilmer
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Publication number: 20110034707Abstract: What is described is a process for starting up a gas phase oxidation reactor for oxidation of o-xylene to phthalic anhydride, said reactor comprising at least one catalyst layer and being temperature-controllable by means of a heat carrier medium, wherein a) the catalyst layer is interrupted by a moderator layer which is less catalytically active than the catalyst layer or is catalytically inactive, b) a gas stream is passed through the reactor with an initial loading of o-xylene and at an initial temperature of the heat transfer medium, c) the loading of the gas stream is increased to a target loading and, in parallel, the temperature of the heat transfer medium is lowered to an operating temperature. The introduction of the moderator layer allows the loading to be increased more rapidly and the startup time to be shortened.Type: ApplicationFiled: April 7, 2009Publication date: February 10, 2011Applicant: BASF SEInventors: Hagen Wilmer, Zürgen Zühike, Thomas Lautensack, Hans-Martin Allmann, Frank Rosowski, Cornelia Katharina Dobner