Patents by Inventor Dieter Schlafer

Dieter Schlafer 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).

  • Recycling of diaphragms
    Patent number: 5765763
    Abstract: The invention relates to a process for recycling diaphragms, in particular a process for recycling used asbestos-free diaphragms from alkali metal chloride electrolysis, the diaphragm material being comminuted, the diaphragm material being washed with a wash substrate and a reusable material being obtained.
    Type: Grant
    Filed: January 11, 1996
    Date of Patent: June 16, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudi Kroner, Bernd Leutner, Dieter Schlafer, Wolfgang Steiner, Holger Friedrich
  • Regeneration of plastic diaphragm
    Patent number: 5755951
    Abstract: A process for the regeneration of plastic diaphragms is described, in which a mineral acid solution is mixed with a suitable corrosion inhibitor, this mixture is temperature controlled at from approximately 0.degree. to 100.degree. C., preferably 40.degree. to 80.degree. C., in particular 50.degree. to 70.degree. C., and passed through the diaphragm for from approximately 0.1 to 84 hours, preferably 1 to 72 hours, in particular 2 to 24 hours.
    Type: Grant
    Filed: June 16, 1997
    Date of Patent: May 26, 1998
    Assignee: BASF Aktiengesellschaft
    Inventors: Rudi Kroner, Bernd Leutner, Hans-Michael Schneider, Holger Friedrich, Kurt Hecky, Dieter Schlafer, Wolfgang Steiner