Patents by Inventor Dieter Stuetzer
Dieter Stuetzer 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: 8933262Abstract: The present invention relates to a process for preparing polyisocyanates from natural raw material sources, in which a composition comprising low molecular weight aromatics which comprise at least one hydroxy group or at least one alkoxy group per molecule (oxyaromatics) is produced from a biomass material, these oxyaromatics are converted into the corresponding aromatic amines and, optionally after condensation with formaldehyde, reacted further with phosgene to give compounds comprising isocyanate groups.Type: GrantFiled: May 24, 2012Date of Patent: January 13, 2015Assignee: BASF SEInventors: Eckhard Stroefer, Otto Machhammer, Stefan Bitterlich, Roman Prochazka, Mario Emmeluth, Julia Leschinski, Emmanouil Pantouflas, Dirk Klingler, Stephan Deuerlein, Stephan Schunk, Jochem Henkelmann, Dieter Stützer
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Patent number: 8796496Abstract: The present invention relates to a process for nonoxidatively dehydroaromatizing a reactant stream comprising C1-C4-aliphatics, comprising the steps of I. feeding reactant stream E into a reaction zone 1, converting reactant stream E under nonoxidative conditions in the presence of a particulate catalyst to a product stream P comprising aromatic hydrocarbons and discharging product stream P from reaction zone 1, II. transferring the catalyst with reduced activity as a result of deposited coke into a reaction zone 2, III. at least partly regenerating the catalyst with supply of a hydrogen-comprising gas stream H in a reaction zone 2, at least some of the coke deposited being converted to methane to form a methane-comprising gas stream M which is fed at least partly to reaction zone 1, IV. discharging the catalyst from reaction zone 2 and V.Type: GrantFiled: August 23, 2010Date of Patent: August 5, 2014Assignee: BASF SEInventors: Christian Schneider, Martin Karches, Joana Coelho Tsou, Sebastian Ahrens, Dieter Stuetzer
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Publication number: 20140155257Abstract: The invention relates to a method of production of catalyst particles, comprising platinum and tin and also at least one further element, selected from lanthanum and cesium, on zirconium dioxide as support, comprising the steps: preparation of one or more solutions containing precursor compounds of Pt, Sn and at least one further element of La or Cs and also ZrO2, converting the solution(s) to an aerosol, bringing the aerosol into a directly or indirectly heated pyrolysis zone, carrying out pyrolysis, and separation of the particles formed from the pyrolysis gas. Suitable precursor compounds comprise zirconium(IV) acetylacetonate, lanthanum(II) acetylacetonate and cesium acetate, hexamethyldisiloxane, tin 2-ethylhexanoate, platinum acetylacetonate, zirconium(IV) propylate in n-propanol and lanthanum(II) acetylacetonate. The invention also relates to the catalyst particles obtainable using the method according to the invention, and to the use thereof as dehydrogenation catalysts.Type: ApplicationFiled: February 4, 2014Publication date: June 5, 2014Applicant: BASF SEInventors: Stefan Hannemann, Dieter Stützer, Goetz-Peter Schindler, Peter Pfab, Frank Kleine Jäger, Dirk Großschmidt
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Patent number: 8680005Abstract: The invention relates to a method of production of catalyst particles, comprising platinum and tin and also at least one further element, selected from lanthanum and cesium, on zirconium dioxide as support, comprising the steps: preparation of one or more solutions containing precursor compounds of Pt, Sn and at least one further element of La or Cs and also ZrO2, converting the solution(s) to an aerosol, bringing the aerosol into a directly or indirectly heated pyrolysis zone, carrying out pyrolysis, and separation of the particles formed from the pyrolysis gas. Suitable precursor compounds comprise zirconium(IV) acetylacetonate, lanthanum(II) acetylacetonate and cesium acetate, hexamethyldisiloxane, tin 2-ethylhexanoate, platinum acetylacetonate, zirconium(IV) propylate in n-propanol and lanthanum(II) acetylacetonate. The invention also relates to the catalyst particles obtainable using the method according to the invention, and to the use thereof as dehydrogenation catalysts.Type: GrantFiled: January 24, 2012Date of Patent: March 25, 2014Assignee: BASF SEInventors: Stefan Hannemann, Dieter Stützer, Goetz-Peter Schindler, Peter Pfab, Frank Kleine Jäger, Dirk Groβschmidt
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Patent number: 8436204Abstract: The invention provides a process for preparing isocyanates by reacting amines with phosgene, wherein the amine or a mixture of amine and a solvent is mixed in the form of an aerosol with gaseous phosgene and the amine is subsequently reacted with phosgene.Type: GrantFiled: July 5, 2007Date of Patent: May 7, 2013Assignee: BASF AktiengesellschaftInventors: Carsten Knoesche, Eckhard Stroefer, Dieter Stuetzer, Bernd Sachweh, Markus Linsenbuhler, Andreas Woelfert
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Publication number: 20120302786Abstract: The present invention relates to a process for preparing polyisocyanates from natural raw material sources, in which a composition comprising low molecular weight aromatics which comprise at least one hydroxy group or at least one alkoxy group per molecule (oxyaromatics) is produced from a biomass material, these oxyaromatics are converted into the corresponding aromatic amines and, optionally after condensation with formaldehyde, reacted further with phosgene to give compounds comprising isocyanate groups.Type: ApplicationFiled: May 24, 2012Publication date: November 29, 2012Applicant: BASF SEInventors: Eckhard Stroefer, Otto Machhammer, Stefan Bitterlich, Roman Prochazka, Mario Emmeluth, Julia Leschinski, Emmanouil Pantouflas, Dirk Klingler, Stephan Deuerlein, Stephan Schunk, Jochem Henkelmann, Dieter Stützer
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Publication number: 20120190538Abstract: The invention relates to a method of production of catalyst particles, comprising platinum and tin and also at least one further element, selected from lanthanum and cesium, on zirconium dioxide as support, comprising the steps: preparation of one or more solutions containing precursor compounds of Pt, Sn and at least one further element of La or Cs and also ZrO2, converting the solution(s) to an aerosol, bringing the aerosol into a directly or indirectly heated pyrolysis zone, carrying out pyrolysis, and separation of the particles formed from the pyrolysis gas. Suitable precursor compounds comprise zirconium(IV) acetylacetonate, lanthanum(II) acetylacetonate and cesium acetate, hexamethyldisiloxane, tin 2-ethylhexanoate, platinum acetylacetonate, zirconium(IV) propylate in n-propanol and lanthanum(II) acetylacetonate. The invention also relates to the catalyst particles obtainable using the method according to the invention, and to the use thereof as dehydrogenation catalysts.Type: ApplicationFiled: January 24, 2012Publication date: July 26, 2012Applicant: BASF SEInventors: Stefan Hannemann, Dieter Stützer, Goetz-Peter Schindler, Peter Pfab, Frank Kleine Jäger, Dirk Großschmidt
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Publication number: 20120190537Abstract: The invention relates to a method of production of catalyst support particles, containing zirconium dioxide and optionally silicon oxide, comprising the steps (i) preparation of a solution containing precursor compounds of zirconium dioxide and optionally of silicon dioxide, (ii) converting the solution(s) to an aerosol, (iii) bringing the aerosol into a directly or indirectly heated pyrolysis zone, (iv) carrying out pyrolysis, and (v) separation of the catalyst particles formed from the pyrolysis gas.Type: ApplicationFiled: January 24, 2012Publication date: July 26, 2012Applicant: BASF SEInventors: Stefan Hannemann, Dieter Stützer, Goetz-Peter Schindler, Peter Pfab, Frank Kleine Jäger, Dirk Grossschmidt
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Publication number: 20120165585Abstract: The present invention relates to a process for nonoxidatively dehydroaromatizing a reactant stream comprising C1-C4-aliphatics, comprising the steps of I. feeding reactant stream E into a reaction zone 1, converting reactant stream E under nonoxidative conditions in the presence of a particulate catalyst to a product stream P comprising aromatic hydrocarbons and discharging product stream P from reaction zone 1, II. transferring the catalyst with reduced activity as a result of deposited coke into a reaction zone 2, III. at least partly regenerating the catalyst with supply of a hydrogen-comprising gas stream H in a reaction zone 2, at least some of the coke deposited being converted to methane to form a methane-comprising gas stream M which is fed at least partly to reaction zone 1, IV. discharging the catalyst from reaction zone 2 and V.Type: ApplicationFiled: August 23, 2010Publication date: June 28, 2012Applicant: BASF SEInventors: Christian Schneider, Martin Karches, Joana Coelho Tsou, Sebastian Ahrens, Dieter Stuetzer
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Patent number: 8044244Abstract: A process for preparing aromatic amines by catalytic hydrogenation of the corresponding nitro compound in a fluidized-bed reactor, in which a gaseous reaction mixture comprising the nitro compound and hydrogen flows from the bottom upward through a heterogeneous particulate catalyst forming a fluidized bed, wherein the fluidized bed is provided with internals which divide the fluidized bed into a plurality of cells arranged horizontally in the fluidized-bed reactor and a plurality of cells arranged vertically in the fluidized-bed reactor, with the cells having cell walls which are permeable to gas and have openings which ensure an exchange number of the heterogeneous, particulate catalyst in the vertical direction in the range from 1 to 100 liters/hour per liter of reactor volume, is proposed.Type: GrantFiled: September 14, 2007Date of Patent: October 25, 2011Assignee: BASF SEInventors: Lothar Seidemann, Lucia Koenigsmann, Christian Schneider, Ekkehard Schwab, Dieter Stuetzer, Celine Liekens
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Patent number: 8038950Abstract: A fluidized-bed reactor for carrying out a gas-phase reaction, in which a gaseous reaction mixture flows from the bottom upward through a heterogeneous particulate catalyst forming a fluidized bed and internals are arranged in the fluidized bed, wherein the internals divide the fluidized bed into a plurality of cells arranged horizontally in the fluidized-bed reactor and a plurality of cells arranged vertically in the fluidized-bed reactor, with the cells having cell walls which are permeable to gas and have openings which ensure an exchange number of the heterogeneous particulate catalyst in the vertical direction in the range from 1 to 100 liters/hour per liter of reactor volume, is proposed.Type: GrantFiled: September 14, 2007Date of Patent: October 18, 2011Assignee: BASF AktiengesellschaftInventors: Lothar Seidemann, Dieter Stuetzer, Thomas Grassler, Martin Karches, Christian Schneider
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Publication number: 20100048955Abstract: A process for preparing aromatic amines by catalytic hydrogenation of the corresponding nitro compound in a fluidized-bed reactor, in which a gaseous reaction mixture comprising the nitro compound and hydrogen flows from the bottom upward through a heterogeneous particulate catalyst forming a fluidized bed, wherein the fluidized bed is provided with internals which divide the fluidized bed into a plurality of cells arranged horizontally in the fluidized-bed reactor and a plurality of cells arranged vertically in the fluidized-bed reactor, with the cells having cell walls which are permeable to gas and have openings which ensure an exchange number of the heterogeneous, particulate catalyst in the vertical direction in the range from 1 to 100 liters/hour per liter of reactor volume, is proposed.Type: ApplicationFiled: September 14, 2007Publication date: February 25, 2010Applicant: BASF SEInventors: Lothar Seidemann, Lucia Koenigsmann, Christian Schneider, Ekkehard Schwab, Dieter Stuetzer, Celine Liekens
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Patent number: 7662900Abstract: The present invention relates to a process for preparing polyisobutene by polymerizing isobutene using an inert diluent and a halogen-containing Lewis acid as a catalyst, wherein the isobutene in the form of droplets is contacted with the Lewis acid in a polymerization apparatus.Type: GrantFiled: October 10, 2006Date of Patent: February 16, 2010Assignee: BASF AktiengesellschaftInventors: Volker Seidl, Carolin Nadine Duecker, Alexandra Wiedemann, Thomas Wettling, Uwe Rachwalsky, Marco-Christian Volland, Martin Karches, Franz Weber, Dieter Stuetzer, Werner Bochnitschek
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Publication number: 20100021354Abstract: A fluidized-bed reactor for carrying out a gas-phase reaction, in which a gaseous reaction mixture flows from the bottom upward through a heterogeneous particulate catalyst forming a fluidized bed and internals are arranged in the fluidized bed, wherein the internals divide the fluidized bed into a plurality of cells arranged horizontally in the fluidized-bed reactor and a plurality of cells arranged vertically in the fluidized-bed reactor, with the cells having cell walls which are permeable to gas and have openings which ensure an exchange number of the heterogeneous particulate catalyst in the vertical direction in the range from 1 to 100 liters/hour per liter of reactor volume, is proposed.Type: ApplicationFiled: September 14, 2007Publication date: January 28, 2010Applicant: BASF SEInventors: Lothar Seidemann, Dieter Stuetzer, Thomas Grassler, Martin Karches, Christian Schneider
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Publication number: 20090281350Abstract: The invention provides a process for preparing isocyanates by reacting amines with phosgene, wherein the amine or a mixture of amine and a solvent is mixed in the form of an aerosol with gaseous phosgene and the amine is subsequently reacted with phosgene.Type: ApplicationFiled: July 5, 2007Publication date: November 12, 2009Applicant: BASF SEInventors: Carsten Knoesche, Eckhard Stroefer, Dieter Stuetzer, Bernd Sachweh, Markus Lisenbuehler, Andreas Woelfert
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Publication number: 20090269270Abstract: A process for preparing chlorine in a fluidized-bed reactor, in which a gaseous reaction mixture comprising hydrogen chloride and oxygen flows from the bottom upward through a heterogeneous particulate catalyst forming a fluidized bed, wherein the fluidized bed is provided with internals which divide the fluidized bed into a plurality of cells arranged horizontally in the fluidized-bed reactor and a plurality of cells arranged vertically in the fluidized-bed reactor, with the cells having cell walls which are permeable to gas and have openings which ensure an exchange number of the heterogeneous, particulate catalyst in the vertical direction in the range from 1 to 100 liters/hour per liter of reactor volume, is proposed.Type: ApplicationFiled: September 19, 2007Publication date: October 29, 2009Applicant: BASF SEInventors: Lothar Seidemann, Martin Karches, Dieter Stuetzer, Martin Sesing, Olga Schubert, Heiko Urtel
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Patent number: 6838061Abstract: A reactor (1) of high cylindrical construction for continuously carrying out gas-liquid, liquid-liquid or gas-liquid-solid reactions, provided with a downward-directed jet nozzle (2) via which the starting materials and the reaction mixture are fed in and which is located in the upper region of the reactor, and provided with an offtake (3), preferably in the lower region of the reactor, via which the reaction mixture is conveyed via an external circuit back to the jet nozzle (2) by means of a pump (P), wherein a guide tube (4) which extends essentially over the total length of the reactor (1) with the exception of the reactor ends and has a cross-sectional area in the range from one tenth to one half of the cross-sectional area of the reactor (1) is located concentrically in the reactor (1), and the jet nozzle (2) is located above the upper end of the guide tube (4), preferably at a distance of from one eighth of the guide tube diameter to one guide tube diameter, or projects into the guide tube (4) to a deptType: GrantFiled: November 23, 1999Date of Patent: January 4, 2005Assignee: BASF AktiengesellschaftInventors: Stefan Berg, Peter Zehner, Regina Benfer, Jörn Müller, Michael Nilles, Ralf Schulz, Dieter Stützer
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Patent number: 6673972Abstract: Polyetherpolyols are prepared by reacting diols or polyols with ethylene oxide, propylene oxide, butylene oxide or a mixture thereof in the presence of a multimetal cyanide complex catalyst by a process which is carried out in a vertical upright cylindrical reactor comprising a jet nozzle which is arranged in the upper reactor region and is directed downward and via which the starting materials and the reaction mixture are fed in, and comprising a take-off, preferably in the lower reactor region, via which the reaction mixture is fed back to the jet nozzle in an external circulation by means of a pump via an equilibration container, comprising a concentric guide tube which extends over the total length of the reactor, except for the reactor ends, and comprising a heat exchanger integrated in the annular space.Type: GrantFiled: July 5, 2002Date of Patent: January 6, 2004Assignee: BASF AktiengesellschaftInventors: Thomas Ostrowski, Kathrin Harre, Peter Zehner, Jörn Müller, Dieter Stützer, Georg Heinrich Grosch, Jürgen Winkler, Stephan Bauer
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Patent number: 6350911Abstract: The invention relates to a process for the preparation of amines by hydrogenation of nitro compounds, which comprises carrying out the hydrogenation in a vertical reactor whose length is greater than its diameter, having a downward-facing jet nozzle arranged in the upper region of the reactor through which the starting materials and the reaction mixture are fed in, and having an outlet at any desired point of the reactor, through which the reaction mixture is fed back to the jet nozzle in an external circuit by means of a conveying means, and having flow reversal in the lower region of the reactor.Type: GrantFiled: June 11, 2001Date of Patent: February 26, 2002Assignee: BASF AktiengesellschaftInventors: Michael Sander, Ulrich Penzel, Hans Volkmar Schwarz, Eckhard Ströfer, Dieter Stützer, Jörn Müller, Markus Maurer, Peter Zehner, Ekkehard Schwab, Ralf Böhling, Dominic Vanoppen
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Patent number: 4778929Abstract: Olefinically unsaturated compounds are hydroformylated continuously, the olefin being passed into the lower region of the reactor, under from 1 to 40 bar and at from 50.degree. to 140.degree. C. with the aid of a rhodium complex as a catalyst in a hydroformylation reactor having a liquid reaction zone which occupies about 60-85% of the reactor volume, the gaseous products and reactants being removed from the hydroformylation reactor, the products being isolated and the major part of the remaining gas being recycled to the reactor by the cycle gas method, by a process in which from 20 to 80% by volume of the cycle gas is fed into the hydroformylation reactor above the liquid reaction zone and/or below the liquid surface in the top fourth of the liquid reaction zone.Type: GrantFiled: July 8, 1987Date of Patent: October 18, 1988Assignee: BASF AktiengesellschaftInventors: Peter Zehner, Herwig Hoffmann, Wolfgang Richter, Dieter Stuetzer, Max Strohmeyer, Helmut Walz, Erich Weippert