Patents by Inventor Korbinian KRÄMER

Korbinian KRÄMER 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).

  • Method for producing diaryl carbonates
    Patent number: 10131617
    Abstract: The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of at least one optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of distillation and recovered.
    Type: Grant
    Filed: May 4, 2015
    Date of Patent: November 20, 2018
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Karl-Heinz Köhler, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski, Henning Kahnis, Gabriel Denecker, Johan Vanden Eynde, Weerachanan Somhom
  • Method for producing diaryl carbonates
    Patent number: 10125083
    Abstract: The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of an optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of crystallization and recovered.
    Type: Grant
    Filed: May 5, 2015
    Date of Patent: November 13, 2018
    Assignee: COVESTRO DEUTSCHLAND AG
    Inventors: Karl-Heinz Köhler, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski, Henning Kahnis, Gabriel Denecker, Johan Vanden Eynde, Weerachanan Somhom
  • Method for producing diaryl carbonate
    Patent number: 9765012
    Abstract: The present application relates to a method for the continuous production of diaryl carbonate from phosgene and of at least one monohydroxy compound (monophenol) in the presence of catalysts, and to the use thereof for the production of polycarbonates.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: September 19, 2017
    Assignee: Covestro Deutschland AG
    Inventors: Karl-Heinz Köhler, Henning Kahnis, Johan Vanden Eynde, Gabriel Denecker, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski
  • METHOD FOR PRODUCING DIARYL CARBONATES
    Publication number: 20170073299
    Abstract: The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of an optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of crystallization and recovered.
    Type: Application
    Filed: May 5, 2015
    Publication date: March 16, 2017
    Inventors: Karl-Heinz Köhler, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski, Henning Kahnis, Gabriel Denecker, Johan Vanden Eynde, Weerachanan Somhom
  • METHOD FOR PRODUCING DIARYL CARBONATES
    Publication number: 20170073300
    Abstract: The invention concerns a method for producing diaryl carbonates from monophenols and phosgene or chloroformic acid aryl esters in the presence of at least one optionally substituted pyridine or the hydrochloride salt thereof as catalyst, and the recovery and reinjection thereof back into the method. The method is carried out at least partially in a liquid phase without the use of an additional solvent, the catalyst being separated by means of distillation and recovered.
    Type: Application
    Filed: May 4, 2015
    Publication date: March 16, 2017
    Inventors: Karl-Heinz Köhler, Ricarda Leiberich, Kaspar Hallenberger, Korbinian Krämer, Florian Lipski, Henning Kahnis, Gabriel Denecker, Johan Vanden Eynde, Weerachanan Somhom
  • METHOD FOR PRODUCING DIARYL CARBONATE
    Publication number: 20160002143
    Abstract: The present application relates to a method for the continuous production of diaryl carbonate from phosgene and of at least one monohydroxy compound (monophenol) in the presence of catalysts, and to the use thereof for the production of polycarbonates.
    Type: Application
    Filed: December 17, 2013
    Publication date: January 7, 2016
    Applicant: BAYER MATERIALSCIENCE AG
    Inventors: Karl-Heinz KÖHLER, Henning KAHNIS, Johan VANDEN EYNDE, Gabriel DENECKER, Ricarda LEIBERICH, Kaspar HALLENBERGER, Korbinian KRÄMER, Florian LIPSKI