Patents by Inventor Michael Zöllinger

Michael Zöllinger 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).

  • Publication number: 20190376200
    Abstract: The present invention relates to a method for the galvanic deposition of zinc and zinc alloy coatings from an alkaline coating bath with a reduced degradation of organic bath additives. An electrode that contains metallic manganese and/or manganese oxide and is insoluble in the bath is hereby used as the anode, and is produced from metallic manganese or a manganese-containing alloy, the manganese-containing alloy comprising at least 5% by weight of manganese, or is produced from an electrically conductive substrate and a metallic manganese and/or manganese oxide-containing coating applied thereto, or is produced from a composite material, with both the metallic manganese and/or manganese oxide-containing coating and the composite material comprising at least 5% by weight of manganese, based on the total amount of manganese resulting from metallic manganese and manganese oxide.
    Type: Application
    Filed: February 5, 2018
    Publication date: December 12, 2019
    Applicant: Dr.-Ing. Max Schlötter GmbH & Co. KG
    Inventors: Volker Wohlfarth, Ralph Krauss, Michael Zöllinger
  • Patent number: 9630866
    Abstract: The present invention relates to a process for workup of nitrite-comprising alkaline process wastewaters from the nitration of aromatic compounds, wherein the alkaline process wastewater is acidified by addition of acids and the offgas which comprises nitrogen oxides and escapes from the acidified process wastewater is worked up, comprising the steps of a) acidifying the process wastewater by adding acid to a pH below 5, which forms an organic phase which separates out, an acidic aqueous phase and a gaseous NOx-containing phase, and b) removing the gaseous NOx-containing phase.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: April 25, 2017
    Assignee: BASF SE
    Inventors: Ruediger Fritz, Renate Hempel, Michael Zoellinger, Holger Allardt, Reiner Reetz
  • Patent number: 8981155
    Abstract: A process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, forming a fluid, amine-comprising reaction mixture in a reactor, wherein chromatographic analysis of the reaction mixture is carried out to determine the concentration of nitro and nitroso compounds in the reaction mixture.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: March 17, 2015
    Assignee: BASF SE
    Inventors: Stefanie Haase, Dusko Kadijevic, Anne-Kathrin Merten, Michael Zoellinger, Andreas Raichle, Alexander Schocker, Sandra Mühlbeyer, Olaf Wiedenhoff, Joana Coelho Tsou
  • Patent number: 8853443
    Abstract: The present invention relates to a process for preparing an isocyanate, comprising hydrogenating a mixture (Gi) comprising an amine in the presence of a hydrogenation catalyst comprising copper to obtain a mixture (Gii) comprising the amine, and reacting the mixture (Gii) with phosgene to obtain a mixture (Giii) comprising the isocyanate. The present invention further relates to the isocyanate preparable by this process.
    Type: Grant
    Filed: November 18, 2009
    Date of Patent: October 7, 2014
    Assignee: BASF SE
    Inventors: Daniel Breuninger, Johannes Adam, Heiner Schelling, Eckhard Stroefer, Markus Kraemer, Matthias Eiermann, Kai Thiele, Michael Zoellinger, Rolf Pinkos
  • Patent number: 8710267
    Abstract: The invention relates to a process for preparing methylenediphenyldiamine (MDA), comprising the following steps a) to c): a) converting formaldehyde and aniline to aminal b) removing water from the aminal obtained in step a) to establish a water content of 0 to 5% by weight based on the aminal, and c) adding an acidic catalyst to the aminal having a water content of 0 to 5% by weight, which comprises using formaldehyde in step a) in the form of highly concentrated formaldehyde with a CH2O content of >50% by weight and preparing the formaldehyde by oxidative dehydrogenation from methanol.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: April 29, 2014
    Assignee: BASF SE
    Inventors: Eckhard Stroefer, Kai Thiele, Michael Zoellinger, Johnny Moors, Jon S. Speier
  • Patent number: 8637712
    Abstract: 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: Grant
    Filed: January 31, 2012
    Date of Patent: January 28, 2014
    Assignee: BASF SE
    Inventors: Holger Allardt, Andreas Raichle, Reiner Reetz, Johannes Büttner, Michael Zöllinger, Stefanie Haase, Rüdiger Fritz
  • Patent number: 8614352
    Abstract: The invention relates to a process for preparing methylenediphenyldiamine (MDA) by reacting formaldehyde and aniline in the presence of an acidic catalyst, wherein the oxygen content in the process for preparing MDA is <10 000 ppm, based on all compounds present in the process. The invention further relates to the phosgenation of MDA to methylenediphenyl diisocyanate (MDI).
    Type: Grant
    Filed: April 20, 2010
    Date of Patent: December 24, 2013
    Assignee: BASF SE
    Inventors: Eckhard Stroefer, Heiner Schelling, Robert Reinhardt, Michael Zoellinger, Daniel Breuninger, Markus Kraemer, Kai Thiele, Peter Van Den Abeel
  • Patent number: 8609899
    Abstract: 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: Grant
    Filed: May 17, 2011
    Date of Patent: December 17, 2013
    Assignee: BASF SE
    Inventors: Andreas Raichle, Joana Coelho Tsou, Samuel Neto, Ulrich Penzel, Steffen Oehlenschlaeger, Michael Zoellinger, Holgar Braunsberg, Stefanie Haase, Johannes Buettner
  • Patent number: 8529771
    Abstract: A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics, said alkaline process wastewater having a pH of 7.5 to 13, comprising the steps of a) acidifying the alkaline process wastewater by adding concentrated sulfuric acid which originates from the workup of the aqueous, sulfuric acid-containing phase obtained in the nitration to a pH below 5, which forms a mixture A consisting of organic phase which separates out and acidic aqueous phase, b) contacting the mixture A with fresh sewage sludge, and c) removing the sewage sludge.
    Type: Grant
    Filed: December 13, 2010
    Date of Patent: September 10, 2013
    Assignee: BASF SE
    Inventors: Ruediger Fritz, Renate Hempel, Michael Zoellinger, Anne-Kathrin Merten, Doris Zschieschang, Ina Homann, Annett Gersdorf, Holger Allardt, Reiner Reetz, Elvira Flegel
  • Publication number: 20120248038
    Abstract: A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics with a pH of 7.5 to 13 or a mixture W with a pH of 6 to 10 of alkaline process wastewater and the aqueous distillate of the sulfuric acid concentration, comprising the steps of a) acidifying the alkaline process wastewater or the mixture W by adding concentrated sulfuric acid which originates from the workup of the aqueous, sulfuric acid-containing phase obtained in the nitration to a pH below 2, which forms a mixture A consisting of organic phase which separates out and acidic aqueous phase, and b) extracting the mixture A with an aromatic extractant.
    Type: Application
    Filed: December 13, 2010
    Publication date: October 4, 2012
    Applicant: BASF SE
    Inventors: Ruediger Fritz, Renate Hempel, Baerbel Guschel, Helmut Richter, Anne-Kathrin Merten, Michael Zoellinger, Elvira Flegel, Holger Allardt, Reiner Reetz
  • Publication number: 20120234773
    Abstract: A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics, said alkaline process wastewater having a pH of 7.5 to 13, comprising the steps of a) acidifying the alkaline process wastewater by adding concentrated sulfuric acid which originates from the workup of the aqueous, sulfuric acid-containing phase obtained in the nitration to a pH below 5, which forms a mixture A consisting of organic phase which separates out and acidic aqueous phase, b) contacting the mixture A with fresh sewage sludge, and c) removing the sewage sludge.
    Type: Application
    Filed: December 13, 2010
    Publication date: September 20, 2012
    Applicant: BASF SE
    Inventors: Ruediger Fritz, Renate Hempel, Michael Zoellinger, Anne-Kathrin Merten, Doris Zschieschang, Ina Homann, Annett Gersdorf, Holger Allardt, Reiner Reetz, Elvira Flegel
  • Publication number: 20120228218
    Abstract: The present invention relates to a process for workup of nitrite-comprising alkaline process wastewaters from the nitration of aromatic compounds, wherein the alkaline process wastewater is acidified by addition of acids and the offgas which comprises nitrogen oxides and escapes from the acidified process wastewater is worked up, comprising the steps of a) acidifying the process wastewater by adding acid to a pH below 5, which forms an organic phase which separates out, an acidic aqueous phase and a gaseous NOx-containing phase, and b) removing the gaseous NOx-containing phase.
    Type: Application
    Filed: December 13, 2010
    Publication date: September 13, 2012
    Applicant: BASF SE
    Inventors: Ruediger Fritz, Renate Hempel, Michael Zoellinger, Holger Allardt, Reiner Reetz
  • Publication number: 20120215029
    Abstract: A process for preparing aromatic amines by hydrogenation of nitroaromatics in the presence of catalysts, forming a fluid, amine-comprising reaction mixture in a reactor, wherein chromatographic analysis of the reaction mixture is carried out to determine the concentration of nitro and nitroso compounds in the reaction mixture.
    Type: Application
    Filed: December 5, 2011
    Publication date: August 23, 2012
    Applicant: BASF SE
    Inventors: Stefanie Haase, Dusko Kadijevic, Anne-Kathrin Merten, Michael Zoellinger, Andreas Raichle, Alexander Schocker, Sandra Mühlbeyer, Olaf Wiedenhoff, Joana Coelho Tsou
  • Publication number: 20120197047
    Abstract: 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: Application
    Filed: January 31, 2012
    Publication date: August 2, 2012
    Applicant: BASF SE
    Inventors: Holger ALLARDT, Andreas RAICHLE, Reiner REETZ, Johannes BÜTTNER, Michael ZÖLLINGER, Stefanie HAASE, Rüdiger FRITZ
  • Publication number: 20120046497
    Abstract: The invention relates to a process for preparing methylenediphenyldiamine (MDA) by reacting formaldehyde and aniline in the presence of an acidic catalyst, wherein the oxygen content in the process for preparing MDA is <10 000 ppm, based on all compounds present in the process. The invention further relates to the phosgenation of MDA to methylenediphenyl diisocyanate (MDI).
    Type: Application
    Filed: April 20, 2010
    Publication date: February 23, 2012
    Applicant: BASF SE
    Inventors: Eckhard Stroefer, Heiner Schelling, Robert Reinhardt, Michael Zoellinger, Daniel Breuninger, Markus Kraemer, Kai Thiele, Peter Van Den Abeel
  • Publication number: 20120035396
    Abstract: The invention relates to a process for preparing methylenediphenyldiamine (MDA), comprising the following steps a) to c): a) converting formaldehyde and aniline to aminal b) removing water from the aminal obtained in step a) to establish a water content of 0 to 5% by weight based on the aminal, and c) adding an acidic catalyst to the aminal having a water content of 0 to 5% by weight, which comprises using formaldehyde in step a) in the form of highly concentrated formaldehyde with a CH2O content of >50% by weight and preparing the formaldehyde by oxidative dehydrogenation from methanol.
    Type: Application
    Filed: April 19, 2010
    Publication date: February 9, 2012
    Applicant: BASF SE
    Inventors: Eckhard Stroefer, Kai Thiele, Michael Zoellinger, Johnny Moors, Jon S. Speier
  • Publication number: 20110295039
    Abstract: 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: Application
    Filed: May 17, 2011
    Publication date: December 1, 2011
    Applicant: BASF SE
    Inventors: Andreas Raichle, Joana Coelho Tsou, Samuel Neto, Ulrich Penzel, Steffen Oehlenschläger, Michael Zöllinger, Holgar Braunsberg, Stefanie Haase, Johannes Büttner
  • Publication number: 20110284391
    Abstract: The invention relates to a process for the electrochemical treatment of aromatic nitro compounds, which comprises the steps: introducing an aqueous composition comprising at least one aromatic nitro compound into the anode space of an electrolysis cell and carrying out an electrolysis at an anodic current density in the range from 0.1 to 10 kA/m2 and a cell potential in the range from 4 to 15 V.
    Type: Application
    Filed: May 19, 2011
    Publication date: November 24, 2011
    Applicants: Verein fuer Kernve. und Analyt. Rosse. e.V. (VKTA), BASF SE
    Inventors: Rüdiger FRITZ, Stefanie Haase, Holger Allardt, Michael Zoellinger, Reiner Reetz, Hans-Juergen Friedrich
  • Publication number: 20110263892
    Abstract: The present invention relates to a process for preparing an isocyanate, comprising hydrogenating a mixture (Gi) comprising an amine in the presence of a hydrogenation catalyst comprising copper to obtain a mixture (Gii) comprising the amine, and reacting the mixture (Gii) with phosgene to obtain a mixture (Giii) comprising the isocyanate. The present invention further relates to the isocyanate preparable by this process.
    Type: Application
    Filed: November 18, 2009
    Publication date: October 27, 2011
    Applicant: BASF SE
    Inventors: Daniel Breuninger, Johannes Adam, Heiner Schelling, Eckhard Stroefer, Markus Kraemer, Matthias Eiermann, Kai Thiele, Michael Zoellinger, Rolf Pinkos
  • Publication number: 20110028579
    Abstract: The continuous or quasi-continuous process for lightening organic polyisocyanates with ozone-containing gas, the treatment of the organic polyisocyanate being effected with an ozone-containing gas which furthermore comprises at least one further inert and/or reactive gas can be carried out, according to the invention, in a stirred tank with connected storage tank, in a sieve tray column or in a packed column.
    Type: Application
    Filed: March 31, 2009
    Publication date: February 3, 2011
    Applicant: BASE SE
    Inventors: Michael Zoellinger, Johannes Adam, Markus Kraemer, Johannes Jacobs, Oliver Bey, Peter Zehner, Walter Van Gysel, Claudia Huang Ruobin, Matthias Kroner