Patents by Inventor Weerachanan Somhom

Weerachanan Somhom 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 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