Patents Assigned to DSM Fine Chemcials NFG GmbH & Co KG
  • Process for the continuous drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups
    Patent number: 7057010
    Abstract: Process for the drying of polymers containing N or amino, ammonium or spirobicyclic ammonium groups, comprising cationic N-containing groups, and suitable counterions, in which the gelled and washed polymers obtained by polymerization, crosslinkage and optionally alkylation are dried continuously using a gaseous medium under normal pressure or overpressure in a fluidized bed.
    Type: Grant
    Filed: January 15, 2004
    Date of Patent: June 6, 2006
    Assignee: DSM Fine Chemcials NFG GmbH & Co KG
    Inventors: Michael Stanek, Georg Häubl, Walter Raml, Erich Steinwender