Patents by Inventor Johannes Buettner
Johannes Buettner 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: 12003613Abstract: A method for synchronizing time in an Ethernet-based network having a master network subscriber and a slave network subscriber includes sending out a first telegram via the master network subscriber, where the slave subscriber receives the first telegram at a first receipt time value of a local system time and stores the first receipt time value. The method can also include reading out the first receipt time value via the master subscriber, sending out a second telegram by the master subscriber, where the slave subscriber receives the second telegram at a second receipt time value of the local system time and stores the second receipt time value, and reading out the second receipt time value via the master network subscriber. A speed parameter of the local system time can be calculated from the receipt time values via the master network subscriber, and transmitted to the slave subscriber.Type: GrantFiled: March 3, 2022Date of Patent: June 4, 2024Assignee: Beckhoff Automation GmbHInventors: Holger Büttner, Dirk Janssen, Erik Vonnahme, Hans Beckhoff, Thomas Rettig, Thorsten Bunte, Johannes Beckhoff, Guido Beckmann, Karl Weber
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Publication number: 20230406704Abstract: The invention relates to a process for concentrating diluted sulfuric acid (10) which may comprise at least one nitroaromatic compound and/or nitric acid as impurities, comprising: (a) feeding the diluted sulfuric acid (10) into a first stage (1) in which low boilers are removed by evaporation and/or stripping to obtain a first concentrated sulfuric acid (12); (b) optionally feeding the first concentrated sulfuric acid (12) into a second evaporation stage (2) to obtain a second concentrated sulfuric acid (14); (c) feeding the second concentrated sulfuric (14) acid into a third evaporation stage (3) if step (b) is carried out, or feeding the first concentrated sulfuric acid (12) into the third evaporation stage (3) if step (b) is not carried out, to obtain concentrated sulfuric acid (16) as product, wherein an oxidizing agent (17) and/or a precursor of an oxidizing agent is fed into the third evaporation stage (3).Type: ApplicationFiled: November 11, 2021Publication date: December 21, 2023Inventors: Maximilian KOELLER, Johannes BUETTNER, Ruediger FRITZ, Jonas MATTERN
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Publication number: 20230347308Abstract: A feed supply unit comprising (a) a feed dosage unit for supplying a viscosity unstable liquid feed to a reactor, (b) a flushing unit for flushing at least a part of the feed dosage unit according to (a) with a flushing medium, and (c) a signal transmission means for transmitting a signal from a monitoring means to a control means.Type: ApplicationFiled: July 19, 2021Publication date: November 2, 2023Inventors: Jonas MATTERN, Johannes BUETTNER, Ruediger FRITZ, Maximilian KOELLER
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Patent number: 9308515Abstract: The invention relates to a process for preparing aromatic amines by hydrogenation of corresponding nitroaromatics by means of hydrogen, and also an apparatus suitable for this purpose. In particular, the invention relates to a process for preparing toluenediamine (TDA) by hydrogenation of dinitrotoluene (DNT).Type: GrantFiled: July 14, 2014Date of Patent: April 12, 2016Assignee: BASF SEInventors: Gerrit Waters, Johannes Buettner, Andreas Raichle, Markus Hiller, Peter Renze, Michael Herrich, Helmut Rueger, Burkhard Hantel, Arndt Hofmann, Ruediger Fritz, Kathrin Richter, Holgar Braunsberg, Lothar Bruntsch
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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: 8895783Abstract: The present invention relates to a continuous process for preparing at least one aromatic amine by hydrogenation of at least one nitroaromatic by means of hydrogen, where a liquid phase comprising at least the aromatic amine and a gas phase comprising at least hydrogen are present, in the presence of a catalyst suspended in the liquid phase at a temperature of from 50 to 250° C. and a pressure of from 5 to 50 bar, wherein the pressure in the reactor is kept essentially constant by continuous adaptation of the amount of hydrogen fed to the reactor, the total amount of hydrogen fed to the reactor is monitored and the introduction of the at least one nitroaromatic is interrupted if the hydrogen uptake in the reactor is not at least 50 mol % of the amount of hydrogen required for stoichiometric reaction of the at least one nitroaromatic to form the at least one aromatic amine.Type: GrantFiled: February 5, 2013Date of Patent: November 25, 2014Assignee: BASF SEInventors: Andreas Raichle, Stefanie Haase, Holgar Braunsberg, Johannes Buettner, Ulrich Penzel, Samuel Neto
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Publication number: 20140341783Abstract: The invention relates to a process for preparing aromatic amines by hydrogenation of corresponding nitroaromatics by means of hydrogen, and also an apparatus suitable for this purpose. In particular, the invention relates to a process for preparing toluenediamine (TDA) by hydrogenation of dinitrotoluene (DNT).Type: ApplicationFiled: July 14, 2014Publication date: November 20, 2014Applicant: BASF SEInventors: Gerrit WATERS, Johannes BUETTNER, Andreas RAICHLE, Markus HILLER, Peter RENZE, Michael HERRICH, Helmut RUEGER, Burkhard HANTEL, Arndt HOFMANN, Ruediger FRITZ, Kathrin RICHTER, Holgar BRAUNSBERG, Lothar BRUNTSCH
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Patent number: 8835688Abstract: The invention relates to a process for preparing aromatic amines by hydrogenation of corresponding nitroaromatics by means of hydrogen, and also an apparatus suitable for this purpose. In particular, the invention relates to a process for preparing toluenediamine (TDA) by hydrogenation of dinitrotoluene (DNT).Type: GrantFiled: March 15, 2012Date of Patent: September 16, 2014Assignee: BASF SEInventors: Gerrit Waters, Johannes Buettner, Andreas Raichle, Markus Hiller, Peter Renze, Michael Herrich, Helmut Rueger, Burkhard Hantel, Arndt Hofmann, Ruediger Fritz, Kathrin Richter, Holgar Braunsberg, Lothar Bruntsch
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Patent number: 8637712Abstract: Precipitations of nitrohydroxyaromatic salts out of the nitrated crude products obtained in the nitration of aromatic compounds after alkaline scrubbing, for example mononitrotoluenes, are prevented by contacting the nitrated crude products with an acidic ion exchanger. The nitrated crude products are preferably selected from a feedstream to a distillation column, a bottoms circulation stream of a distillation column and a feedstream to a vaporizer.Type: GrantFiled: January 31, 2012Date of Patent: January 28, 2014Assignee: BASF SEInventors: Holger Allardt, Andreas Raichle, Reiner Reetz, Johannes Büttner, Michael Zöllinger, Stefanie Haase, Rüdiger Fritz
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Patent number: 8609899Abstract: The invention relates to a process for the continuous preparation of toluenediamine by liquid-phase hydrogenation of dinitrotoluene by means of hydrogen in the presence of a suspended, nickel-comprising catalyst in a reactor with a product isolation unit downstream of the reactor to give a product output from the reactor comprising a liquid phase comprising toluenediamine and dinitrotoluene, in which the nickel-comprising catalyst is suspended, wherein the concentration of dinitrotoluene in the liquid phase of the product output from the reactor in the region between the reactor and the downstream product isolation unit is set to a value in the range from 1 to 200 ppm by weight, based on the total weight of the liquid phase of the product output from the reactor.Type: GrantFiled: May 17, 2011Date of Patent: December 17, 2013Assignee: BASF SEInventors: Andreas Raichle, Joana Coelho Tsou, Samuel Neto, Ulrich Penzel, Steffen Oehlenschlaeger, Michael Zoellinger, Holgar Braunsberg, Stefanie Haase, Johannes Buettner
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Publication number: 20130211141Abstract: The present invention relates to a continuous process for preparing at least one aromatic amine by hydrogenation of at least one nitroaromatic by means of hydrogen, where a liquid phase comprising at least the aromatic amine and a gas phase comprising at least hydrogen are present, in the presence of a catalyst suspended in the liquid phase at a temperature of from 50 to 250° C. and a pressure of from 5 to 50 bar, wherein the pressure in the reactor is kept essentially constant by continuous adaptation of the amount of hydrogen fed to the reactor, the total amount of hydrogen fed to the reactor is monitored and the introduction of the at least one nitroaromatic is interrupted if the hydrogen uptake in the reactor is not at least 50 mol % of the amount of hydrogen required for stoichiometric reaction of the at least one nitroaromatic to form the at least one aromatic amine.Type: ApplicationFiled: February 5, 2013Publication date: August 15, 2013Inventors: Andreas RAICHLE, Stefanie Haase, Holgar Braunsberg, Johannes Buettner, Ulrich Penzel, Samuel Neto
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Publication number: 20120238779Abstract: The invention relates to a process for preparing aromatic amines by hydrogenation of corresponding nitroaromatics by means of hydrogen, and also an apparatus suitable for this purpose. In particular, the invention relates to a process for preparing toluenediamine (TDA) by hydrogenation of dinitrotoluene (DNT).Type: ApplicationFiled: March 15, 2012Publication date: September 20, 2012Applicant: BASF SEInventors: Gerrit WATERS, Johannes Büttner, Andreas Raichle, Markus Hiller, Peter Renze, Michael Herrich, Helmut Rüger, Burkhard Hantel, Arndt Hofmann, Rüdiger Fritz, Kathrin Richter, Holgar Braunsberg, Lothar Bruntsch
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Publication number: 20120197047Abstract: Precipitations of nitrohydroxyaromatic salts out of the nitrated crude products obtained in the nitration of aromatic compounds after alkaline scrubbing, for example mononitrotoluenes, are prevented by contacting the nitrated crude products with an acidic ion exchanger. The nitrated crude products are preferably selected from a feedstream to a distillation column, a bottoms circulation stream of a distillation column and a feedstream to a vaporizer.Type: ApplicationFiled: January 31, 2012Publication date: August 2, 2012Applicant: BASF SEInventors: Holger ALLARDT, Andreas RAICHLE, Reiner REETZ, Johannes BÜTTNER, Michael ZÖLLINGER, Stefanie HAASE, Rüdiger FRITZ
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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: 20110295039Abstract: The invention relates to a process for the continuous preparation of toluenediamine by liquid-phase hydrogenation of dinitrotoluene by means of hydrogen in the presence of a suspended, nickel-comprising catalyst in a reactor with a product isolation unit downstream of the reactor to give a product output from the reactor comprising a liquid phase comprising toluenediamine and dinitrotoluene, in which the nickel-comprising catalyst is suspended, wherein the concentration of dinitrotoluene in the liquid phase of the product output from the reactor in the region between the reactor and the downstream product isolation unit is set to a value in the range from 1 to 200 ppm by weight, based on the total weight of the liquid phase of the product output from the reactor.Type: ApplicationFiled: May 17, 2011Publication date: December 1, 2011Applicant: BASF SEInventors: Andreas Raichle, Joana Coelho Tsou, Samuel Neto, Ulrich Penzel, Steffen Oehlenschläger, Michael Zöllinger, Holgar Braunsberg, Stefanie Haase, Johannes Büttner
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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: 7449610Abstract: The invention provides a process for removing nitrocresols from wastewater of mononitrotoluene preparation, which comprises acidifying the alkaline wastewater of mononitrotoluene preparation with acids to a pH of at most 3 and treating the nitrocresols with an extractant. The invention further provides the preparation of dinitrotoluene by use of the nitrocresol-containing extracts as a feedstock.Type: GrantFiled: September 18, 2004Date of Patent: November 11, 2008Assignee: BASF SEInventors: Johannes Buettner, Holger Allardt, Reinhard Tonder, Reiner Reetz, Michael Reichelt
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Publication number: 20070043244Abstract: The invention provides a process for removing nitrocresols from wastewater of mononitrotoluene preparation, which comprises acidifying the alkaline wastewater of mononitrotoluene preparation with acids to a pH of at most 3 and treating the nitrocresols with an extractant. The invention further provides the preparation of dinitrotoluene by use of the nitrocresol-containing extracts as a feedstock.Type: ApplicationFiled: September 18, 2004Publication date: February 22, 2007Applicant: Basf AktiengesellschaftInventor: Johannes Buettner