Patents by Inventor Carsten Knoesche

Carsten Knoesche 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).

  • PROCESS FOR PREPARING ISOCYANATES
    Publication number: 20100048942
    Abstract: The present invention relates to a process for preparing isocyanates in particular apparatuses.
    Type: Application
    Filed: November 30, 2007
    Publication date: February 25, 2010
    Applicant: BASF SE
    Inventors: Carsten Knoesche, Torsten Mattke
  • METHOD FOR PRODUCING ISOCYANATES
    Publication number: 20100041915
    Abstract: The present invention relates to a process for preparing diisocyanates from diamines and phosgene in the gas phase.
    Type: Application
    Filed: December 12, 2007
    Publication date: February 18, 2010
    Applicant: BASF SE
    Inventors: Andreas Woelfert, Carsten Knoesche, Torsten Mattke, Eckhard Stroefer
  • Method for separating hydrogen chloride and phosgene
    Patent number: 7659430
    Abstract: The invention relates to a process for separating hydrogen chloride and phosgene, which comprises bringing a mixture of hydrogen chloride and phosgene into contact with an ionic liquid in which at least part of the hydrogen chloride is dissolved in a step a) and then separating off the hydrogen chloride dissolved in the ionic liquid in a step b).
    Type: Grant
    Filed: September 10, 2005
    Date of Patent: February 9, 2010
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Woelfert, Carsten Knoesche, Hans-Juergen Pallasch, Martin Sesing, Eckhard Stroefer, Hans-Martin Polka, Manfred Heilig
  • METHOD FOR PRODUCING ISOCYANATES
    Publication number: 20090281350
    Abstract: 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: Application
    Filed: July 5, 2007
    Publication date: November 12, 2009
    Applicant: BASF SE
    Inventors: Carsten Knoesche, Eckhard Stroefer, Dieter Stuetzer, Bernd Sachweh, Markus Lisenbuehler, Andreas Woelfert
  • METHOD FOR PRODUCING ISOCYANATES
    Publication number: 20090221846
    Abstract: The present invention relates to a process for preparing isocyanates and an apparatus suitable for this purpose, and also its use.
    Type: Application
    Filed: August 23, 2006
    Publication date: September 3, 2009
    Applicant: BASF SE
    Inventors: Andreas Wölfert, Carsten Knösche, Andreas Daiss, Tsung-Chieh Cheng, Torsten Mattke, Eckhard Stroefer
  • Method for producing isocyanates
    Patent number: 7488842
    Abstract: The invention relates to a process for preparing isocyanates by reacting amines with phosgene in the gas phase in a reaction zone, with the reaction mixture being passed through a zone into which a liquid is sprayed to stop the reaction, wherein the reaction mixture is passed through a zone having a reduced flow cross section between the reaction zone and the zone into which the liquid is sprayed.
    Type: Grant
    Filed: June 22, 2005
    Date of Patent: February 10, 2009
    Assignee: BASF Aktiengesellschaft
    Inventors: Carsten Knoesche, Andreas Woelfert, Andreas Daiss
  • Method for the distillative recovery of toluylenediamine
    Patent number: 7342134
    Abstract: The invention relates to a process for distillatively preparing TDA from a reactant stream comprising TDA, high boilers and low boilers in a dividing wall column in which a dividing wall is disposed in the longitudinal direction of the column to form an upper combined column region (2), a lower combined column region (3), a feed section (4) having a rectifying section (5) and stripping section (6), and also a withdrawal section (7) having a rectifying section (9) and stripping section (8), which comprises the following steps: a. feeding the reactant stream (13) into the feed section (4) of the dividing wall column (1); b. drawing off a low boiler fraction via the top of the column (11); c. drawing off TDA via a side draw (14) in the withdrawal section (7) of the dividing wall column (1); d. drawing off a low boiler fraction via the bottom of the column (12).
    Type: Grant
    Filed: January 7, 2005
    Date of Patent: March 11, 2008
    Assignee: BASF Aktiengesellschaft
    Inventors: Carsten Knoesche, Martin Sohn, Ulrich Penzel, Hans-Juergen Pallasch, Gunter Georgi, Wolfgang Mackenroth, Hans Volkmar Schwarz, Stefan Maixner, Gerald Molz, Eckhard Stroefer
  • Method for the distillative recovery of toluylenediamine
    Publication number: 20070083065
    Abstract: The invention relates to a process for distillatively preparing TDA from a reactant stream comprising TDA, high boilers and low boilers in a dividing wall column in which a dividing wall is disposed in the longitudinal direction of the column to form an upper combined column region (2), a lower combined column region (3), a feed section (4) having a rectifying section (5) and stripping section (6), and also a withdrawal section (7) having a rectifying section (9) and stripping section (8), which comprises the following steps: a. feeding the reactant stream (13) into the feed section (4) of the dividing wall column (1); b. drawing off a low boiler fraction via the top of the column (11); c. drawing off TDA via a side draw (14) in the withdrawal section (7) of the dividing wall column (1); d. drawing off a low boiler fraction via the bottom of the column (12).
    Type: Application
    Filed: January 7, 2005
    Publication date: April 12, 2007
    Applicant: BASF AKTIENGESELLSCHAFT
    Inventors: Carsten Knoesche, Martin Sohn, Ulrich Penzel, Hans-Jurgen Pallach, Gunter Georgi, Wolfgang Mackenroth, Hans Schwarz, Stefan Maixner, Gerald Molz, Eckhard Stroefer
  • Production of isocyanates in the gaseous phase
    Patent number: 7084297
    Abstract: The invention relates to a method for producing isocyanates by reacting primary amines with phosgene in the gaseous phase. Said method is characterized in that the reaction of amine and phosgene occurs in a reaction channel, the internal dimensions of which have a width/height ratio of at least 2/1.
    Type: Grant
    Filed: November 19, 2002
    Date of Patent: August 1, 2006
    Assignee: BASF Aktiengesellschaft
    Inventors: Andreas Woelfert, Christian Mueller, Eckhard Stroefer, Joachim Pfeffinger, Markus Weber, Carsten Knoesche