Patents by Inventor Wolfgang Mackenroth
Wolfgang Mackenroth 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: 9505705Abstract: The invention provides a process for preparing aromatic amines by catalytically hydrogenating the corresponding nitro compounds, especially for preparing tolylenediamine by hydrogenating dinitrotoluene, which comprises using hydrogenation catalysts in which the active component present is a mixture of platinum, nickel and an additional metal on a support.Type: GrantFiled: August 21, 2006Date of Patent: November 29, 2016Assignee: BASF AKTEINGESELLSCHAFTInventors: Petr Kubanek, Ekkehard Schwab, Frederik van Laar, Wolfgang Mackenroth
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Patent number: 9295971Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. Here, the cooling medium surrounds the tubes of the heat exchanger of the apparatus of the invention whereas the reaction takes place in the tubes.Type: GrantFiled: January 6, 2014Date of Patent: March 29, 2016Assignee: BASF SEInventors: Oliver Bey, Andreas Raichle, Hartmut Riechers, Roland Mueller, Wolfgang Mackenroth, Peter Zehner
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Patent number: 9079822Abstract: A process for the preparation of mononitroaromatics and dinitroaromatics, in which a hydrate melt of at least one metal nitrate M(NO3)3 is used as a nitrating medium, it being possible for M to be the metals Fe, Cr, Y, La, Ce, Al, Bi and In, and the metal nitrate having a water content of from 4 to 9 mol of water per M(NO3)3, leads to simplifications of the process and improved yields.Type: GrantFiled: February 26, 2010Date of Patent: July 14, 2015Assignee: BASF SEInventors: Wolfgang Mackenroth, Johannes Buettner, Eckhard Stroefer, Wolfgang Voigt, Frank Bok
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Publication number: 20150166461Abstract: A process for the preparation of mononitroaromatics and dinitroaromatics, in which a hydrate melt of at least one metal nitrate M(NO3)3 is used as a nitrating medium, it being possible for M to be the metals Fe, Cr, Y, La, Ce, Al, Bi and In, and the metal nitrate having a water content of from 4 to 9 mol of water per M(NO3)3, leads to simplifications of the process and improved yields.Type: ApplicationFiled: February 23, 2015Publication date: June 18, 2015Applicant: BASF SEInventors: Wolfgang MACKENROTH, Johannes BUETTNER, Eckhard STROEFER, Wolfgang VOIGT, Frank BOK
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Patent number: 8829232Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, if appropriate in the presence of at least one inert medium, in which the amine and the phosgene are first mixed in a mixing chamber (1) to give a reaction mixture and the reaction mixture is fed to a reactor, the amine being added through an orifice (3) arranged coaxially to the mixing chamber (1) and the phosgene being added through feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1), or the phosgene being added through the orifice (3) arranged coaxially to the mixing chamber and the amine through the feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1). At least one plane (9) is arranged upstream and at least one plane (7) downstream of the orifice (3) arranged coaxially to the mixing chamber (1) in main flow direction of the reaction mixture.Type: GrantFiled: August 6, 2009Date of Patent: September 9, 2014Assignee: BASF SEInventors: Ulrich Penzel, Torsten Mattke, Andreas Wölfert, Johannes Jacobs, Tsung-Chieh Cheng, Kerstin Heinen, Eckhard Stroefer, Stefan Maixner, Wolfgang Mackenroth, Christian Tragut, Kai Thiele, Myung Un Won
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Publication number: 20140200370Abstract: The present invention relates to an apparatus of the loop Venturi reactor type for the continuous reaction of liquids with gases, in particular for hydrogenations, oxidations or acetylations, e.g. for the preparation of toluenediamine by hydrogenation of dinitrotoluene, and a process for the continuous reaction of liquid reactants with gaseous reactants in the apparatus. Here, the cooling medium surrounds the tubes of the heat exchanger of the apparatus of the invention whereas the reaction takes place in the tubes.Type: ApplicationFiled: January 6, 2014Publication date: July 17, 2014Applicant: BASF SEInventors: Oliver BEY, Andreas RAICHLE, Hartmut RIECHERS, Roland MUELLER, Wolfgang MACKENROTH, Peter ZEHNER
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Patent number: 8614356Abstract: A process for preparing tolylenediamine by hydrogenating dinitrotoluene with hydrogen in the presence of a suspended catalyst in a vertically upright reactor (1), at the upper end of which is arranged a motive jet nozzle (2) through which the reaction mixture drawn off from the reactor bottom, via an external loop, is sprayed into the upper region of the reactor (1) and then flows into a central inserted tube (4) which is arranged in the longitudinal direction of the reactor, flows through the latter from the top downward and flows upward again outside the inserted tube (4) in an internal loop motion, with a heat exchanger (6) in the interior of the reactor (1), through which cooling water flows, and absorbs some of the heat of reaction as it does so, with a feed for the dinitrotoluene at the upper end of the reactor (1) and a feed for the hydrogen at the lower end of the reactor (1), and wherein, in addition to the heat exchanger (6) arranged in the interior of the reactor (1), a further heat exchanger (WType: GrantFiled: December 21, 2009Date of Patent: December 24, 2013Assignee: BASF SEInventors: Joana Coelho Tsou, Steffen Oehlenschlaeger, Ekkehard Schwab, Wolfgang Mackenroth, Hartwig Voss, Stefan Maixner, Samuel Neto, Sven Boehmeke, Frederik Van Laar
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Publication number: 20110306795Abstract: A process for the preparation of mononitroaromatics and dinitroaromatics, in which a hydrate melt of at least one metal nitrate M(NO3)3 is used as a nitrating medium, it being possible for M to be the metals Fe, Cr, Y, La, Ce, Al, Bi and In, and the metal nitrate having a water content of from 4 to 9 mol of water per M(NO3)3, leads to simplifications of the process and improved yields.Type: ApplicationFiled: February 26, 2010Publication date: December 15, 2011Applicant: BASF SEInventors: Wolfgang Mackenroth, Johannes Buettner, Eckhard Stroefer, Wolfgang Voigt, Frank Bok
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Publication number: 20110275858Abstract: A process for preparing tolylenediamine by hydrogenating dinitrotoluene with hydrogen in the presence of a suspended catalyst in a vertically upright reactor (1), at the upper end of which is arranged a motive jet nozzle (2) through which the reaction mixture drawn off from the reactor bottom, via an external loop, is sprayed into the upper region of the reactor (1) and then flows into a central inserted tube (4) which is arranged in the longitudinal direction of the reactor, flows through the latter from the top downward and flows upward again outside the inserted tube (4) in an internal loop motion, with a heat exchanger (6) in the interior of the reactor (1), through which cooling water flows, and absorbs some of the heat of reaction as it does so, with a feed for the dinitrotoluene at the upper end of the reactor (1) and a feed for the hydrogen at the lower end of the reactor (1), and wherein, in addition to the heat exchanger (6) arranged in the interior of the reactor (1), a further heat exchanger (WType: ApplicationFiled: December 21, 2009Publication date: November 10, 2011Applicant: BASF SEInventors: Joana Coelho Tsou, Steffen Oehlenschlaeger, Ekkehard Schwab, Wolfgang Mackenroth, Hartwig Voss, Stefan Maixner, Samuel Neto, Sven Boehmeke, Frederik van Laar
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Publication number: 20110251425Abstract: The invention relates to a process for preparing isocyanates by reacting the corresponding amines with phosgene in the liquid phase, if appropriate in the presence of at least one inert medium, in which the amine and the phosgene are first mixed in a mixing chamber (1) to give a reaction mixture and the reaction mixture is fed to a reactor, the amine being added through an orifice (3) arranged coaxially to the mixing chamber (1) and the phosgene being added through feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1), or the phosgene being added through the orifice (3) arranged coaxially to the mixing chamber and the amine through the feed orifices (5) in at least two planes (7, 9) arranged at right angles to the axis (11) of the mixing chamber (1). At least one plane (9) is arranged upstream and at least one plane (7) downstream of the orifice (3) arranged coaxially to the mixing chamber (1) in main flow direction of the reaction mixture.Type: ApplicationFiled: August 6, 2009Publication date: October 13, 2011Applicant: BASF SEInventors: Ulrich Penzel, Torsten Mattke, Andreas Wolfert, Johannes Jocobs, Tsung-Chieh Cheng, Kerstin Heinen, Eckhard Stroefer, Stefan Maixner, Wolfgang Mackenroth, Christian Tragut, Kai Thiele, Myung Un Won
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Patent number: 7851661Abstract: The present invention provides a process for preparing dinitrotoluene, comprising the steps of a) reacting toluene with nitric acid in the presence of sulphuric acid to give mononitrotoluene, b) separating the reaction product from step a) into an organic phase comprising mononitrotoluene and an aqueous phase comprising sulfuric acid, c) reacting the organic phase comprising mononitrotoluene with nitric acid in the presence of sulphuric acid to give dinitrotoluene, d) separating the reaction product from step c) into an organic phase comprising dinitrotoluene and an aqueous phase comprising sulfuric acid, wherein the reaction product from step a) has a content of toluene of from 3.0 to 8% by weight, based on the organic phase, and a content of nitric acid of from 0.1 to 1.2% by weight, based on the aqueous phase, and the phase separation in step b) is effected in such a way that further reaction of the toluene with the nitric acid is prevented.Type: GrantFiled: February 2, 2005Date of Patent: December 14, 2010Assignee: BASF AktiengesellschaftInventors: Johannes Buettner, Wolfgang Mackenroth, Heinrich Hermann, Peter Konieczny, Juergen Gebauer
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Patent number: 7851648Abstract: The invention relates to a process for preparing polyisocyanates by reacting organic amines with phosgene, wherein the reaction is carried out in at least three stages, with the first stage being carried out in a mixing apparatus, the second stage in at least one residence apparatus and the third stage in at least one separation apparatus and the pressure in each successive stage being lower than that in the previous stage.Type: GrantFiled: December 13, 2003Date of Patent: December 14, 2010Assignee: BASF AktiengesellschaftInventors: Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Rene Leuthold, Andreas Brodhagen, Andreas Woelfert, Wolfgang Mackenroth, Markus Maurer
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Patent number: 7838702Abstract: A process for aminating hydrocarbons with ammonia, wherein the N2 content in the mixture at the reactor exit is less than 0.1% by volume based on the total volume of the mixture at the reactor exit.Type: GrantFiled: February 13, 2007Date of Patent: November 23, 2010Assignee: BASF SEInventors: Frederik Van Laar, Ekkehard Schwab, Joachim-Thierry Anders, Sven Crone, Karl Hoelemann, Wolfgang Mackenroth, Petr Kubanek
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Patent number: 7741522Abstract: A process for aminating hydrocarbons with ammonia in the presence of catalyst (i) which catalyzes the amination, which comprises supplying oxidizing agent to the reaction mixture and reacting the oxidizing agent with hydrogen which is formed in the amination in the presence of a catalyst (ii) which catalyzes this reaction with hydrogen.Type: GrantFiled: February 15, 2007Date of Patent: June 22, 2010Assignee: BASF AktiengesellschaftInventors: Frederik Van Laar, Ekkehard Schwab, Joachim-Thierry Anders, Sven Crone, Karl Hoelemann, Wolfgang Mackenroth, Petr Kubanek
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Publication number: 20100130788Abstract: The invention relates to a process for preparing aromatic amines by catalytic hydrogenation of the corresponding nitro compounds, in particular for preparing toluenediamine by hydrogenation of dinitrotoluene, wherein hydrogenation catalysts in which a mixture of nickel, palladium and an additional element selected from the group consisting of cobalt, iron, vanadium, manganese, chromium, platinum, iridium, gold, bismuth, molybdenum, selenium, tellurium, tin and antimony is present as active component on a support are used.Type: ApplicationFiled: May 5, 2008Publication date: May 27, 2010Applicant: BASF SEInventors: Joana Coelho Tsou, Ekkehard Schwab, Petr Kubanek, Wolfgang Mackenroth, Steffen Oehlenschlaeger, Hartwig Voss, Sameul Neto
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Publication number: 20090292144Abstract: A process for aminating hydrocarbons with ammonia, which comprises performing the amination in the presence of an additive which reacts with hydrogen, the additive used being at least one organic chemical compound, N2O, hydroxylamine, hydrazine and/or carbon monoxide.Type: ApplicationFiled: July 17, 2007Publication date: November 26, 2009Applicant: BASF SEInventors: Joachim-Thierry Anders, Johann-Peter Melder, Petr Kubanek, Ekkehard Schwab, Wolfgang Mackenroth, Karl Hoelemann, Frederik Van Laar
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Patent number: 7584629Abstract: The invention relates to a process for the partial or complete separation of a mixture comprising hydrogen chloride and phosgene, possibly solvents and possibly low boilers and inerts as are typically obtained in the preparation of isocyanates by reaction of amines with phosgene, which comprises firstly carrying out a partial or complete condensation of phosgene, then a distillation or stripping step in a column to remove the hydrogen chloride from the bottom product phosgene and subsequently a scrub of the top product hydrogen chloride by means of the process solvent to absorb the phosgene in the process solvent. An after-purification by means of adsorption on activated carbon or by another suitable method can subsequently be carried out to remove solvent residues.Type: GrantFiled: December 13, 2003Date of Patent: September 8, 2009Assignee: BASF AktiengesellschaftInventors: Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Peter Van Den Abeel, Filip Deberdt, Jan D. Jacobs, Wolfgang Mackenroth
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Publication number: 20090203941Abstract: A process for aminating hydrocarbons comprises physically removing hydrogen from the reaction mixture.Type: ApplicationFiled: August 21, 2006Publication date: August 13, 2009Applicant: BASF SEInventors: Frederik Van Laar, Ekkehard Schwab, Hartwig Voss, Joachim-Thierry Anders, Sven Crone, Wolfgang Mackenroth
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Patent number: 7524405Abstract: The invention relates to a process for preparing isocyanates by reaction of amines with phosgene in the presence of inert organic solvents in a reactor and subsequent work-up of the reaction mixture leaving the reactor, wherein the solvent is separated off in a two-stage or multistage, preferably two-stage, distillation process in which the solvent is separated off at a pressure of 0.1-15 bar in a first apparatus and at 1-900 mbar in a second apparatus or further apparatuses, with the heat of condensation of the solvent vapor from the first apparatus being used for partial or complete vaporization of solvent in the second apparatus.Type: GrantFiled: December 13, 2003Date of Patent: April 28, 2009Assignee: BASF AktiengesellschaftInventors: Martin Sohn, Eckhard Stroefer, Filip Nevejans, Ulrich Penzel, Hans-Juergen Pallasch, Peter Van Den Abeel, Filip Deberdt, Jan D. Jacobs, Wolfgang Mackenroth
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Publication number: 20090030234Abstract: A process for aminating hydrocarbons with ammonia, wherein the N2 content in the mixture at the reactor exit is less than 0.1 % by volume based on the total volume of the mixture at the reactor exit.Type: ApplicationFiled: February 13, 2007Publication date: January 29, 2009Applicant: BASF SEInventors: Frederik van Laar, Ekkehard Schwab, Joachim-Thierry Anders, Sven Crone, Karl Holemann, Wolfgang Mackenroth, Petr Kubanek