Patents by Inventor Holgar Braunsberg

Holgar Braunsberg 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).

  • Optimized introduction of the starting materials for a process for preparing aromatic amines by hydrogenation of nitroaromatics
    Patent number: 9308515
    Abstract: 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: Grant
    Filed: July 14, 2014
    Date of Patent: April 12, 2016
    Assignee: BASF SE
    Inventors: 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
  • Monitoring of the stoichiometric ratio in the reaction of nitroaromatics with hydrogen
    Patent number: 8895783
    Abstract: 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: Grant
    Filed: February 5, 2013
    Date of Patent: November 25, 2014
    Assignee: BASF SE
    Inventors: Andreas Raichle, Stefanie Haase, Holgar Braunsberg, Johannes Buettner, Ulrich Penzel, Samuel Neto
  • OPTIMIZED INTRODUCTION OF THE STARTING MATERIALS FOR A PROCESS FOR PREPARING AROMATIC AMINES BY HYDROGENATION OF NITROAROMATICS
    Publication number: 20140341783
    Abstract: 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: Application
    Filed: July 14, 2014
    Publication date: November 20, 2014
    Applicant: BASF SE
    Inventors: 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
  • Optimized introduction of the starting materials for a process for preparing aromatic amines by hydrogenation of nitroaromatics
    Patent number: 8835688
    Abstract: 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: Grant
    Filed: March 15, 2012
    Date of Patent: September 16, 2014
    Assignee: BASF SE
    Inventors: 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
  • Process for preparing toluenediamine by hydrogenation of dinitrotoluene
    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
  • MONITORING OF THE STOICHIOMETRIC RATIO IN THE REACTION OF NITROAROMATICS WITH HYDROGEN
    Publication number: 20130211141
    Abstract: 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: Application
    Filed: February 5, 2013
    Publication date: August 15, 2013
    Inventors: Andreas RAICHLE, Stefanie Haase, Holgar Braunsberg, Johannes Buettner, Ulrich Penzel, Samuel Neto
  • OPTIMIZED INTRODUCTION OF THE STARTING MATERIALS FOR A PROCESS FOR PREPARING AROMATIC AMINES BY HYDROGENATION OF NITROAROMATICS
    Publication number: 20120238779
    Abstract: 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: Application
    Filed: March 15, 2012
    Publication date: September 20, 2012
    Applicant: BASF SE
    Inventors: 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
  • PROCESS FOR PREPARING TOLUENEDIAMINE BY HYDROGENATION OF DINITROTOLUENE
    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