Patents Assigned to Bayer MaerialScience AG
  • Process for preparing diaryl carbonate
    Patent number: 8882984
    Abstract: A process for preparing diaryl carbonate and utilizing at least part of the process wastewater by increasing the concentration of the wastewater phases containing sodium chloride for the electrolysis by means of osmotic membrane distillation with simultaneous dilution of the sodium hydroxide solution obtained from the electrolysis for the diaryl carbonate production process (diphenyl carbonate process) is described.
    Type: Grant
    Filed: April 13, 2010
    Date of Patent: November 11, 2014
    Assignee: Bayer MaerialScience AG
    Inventors: Pieter Ooms, Andreas Bulan, Johann Rechner, Rainer Weber, Michael Traving, Marc Buts, Johan Vanden Eynde