Patents Assigned to GFT Gesellschaft fur Trenntechnik mbh
  • Pervaporation process and membrane
    Patent number: 4925562
    Abstract: A prevaporation process characterized by excellent separation efficiency employs a membrane that comprises an elastomeric polymer matrix containing zeolite.
    Type: Grant
    Filed: July 23, 1987
    Date of Patent: May 15, 1990
    Assignee: GFT Gesellschaft fur Trenntechnik mbH
    Inventors: Hendrikus J. D. te Hennepe, Marcellinus H. V. Mulder, Cornelis A. Smolders, Derk Bargeman, George A. T. Schroder
  • Method for production of solution-diffusion membranes and their application for pervaporation
    Patent number: 4865743
    Abstract: For producing solution/diffusion membranes, homogeneous dense films prepared by melt extrusion or casting from synthetic polymers, having a melting temperature above 140.degree. C., a glass transition temperature above 0.degree. C. and long time stability against boiling ethanol are irradiated with accelerated electrons and submitted to a subsequent radical graft copolymerization. After graft polymerzation, the functional groups are converted into the dissociated salts.
    Type: Grant
    Filed: December 29, 1986
    Date of Patent: September 12, 1989
    Assignee: GFT Gesellschaft fur Trenntechnik mbh
    Inventors: Guido Ellinghorst, Bernd Goetz, Axel Niemoeller, Horst Scholz, Hartmut E. A. Brueschke, Guenter Tusel