Patents by Inventor Waltraud Schnick

Waltraud Schnick 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).

  • Methods for reactivating zeolites
    Patent number: 4043938
    Abstract: A zeolite of type 5A, which has been used to separate normal paraffins from a hydrocarbon mixture containing normal paraffins by bringing the hydrocarbon mixture into contact with the zeolite whereby the zeolite absorbs the normal paraffins and then desorbing the normal paraffins from the zeolite by contacting the zeolite with water-containing ammonia vapour, is reactivated by first contacting the zeolite with at least one of water, aqueous solutions and water-containing gases at a temperature below 350.degree. C and then heating the zeolite to a temperature above 350.degree. C.
    Type: Grant
    Filed: February 3, 1975
    Date of Patent: August 23, 1977
    Assignee: VEB Leuna-Werke "Walter Ulbricht"
    Inventors: Hans-Heinrich Reif, Klaus Wehner, Jurgen Welker, Karl-Heinz Schmidt, Waltraud Schnick, Lutz Widmann, Otto Schicker, Gunter Seidel, Karsten Kalb, Wolfhard Dollase, Helmut Furtig, Werner Hose, Wolfgang Roscher, Udo Hadicke, Herbert Knoll, Rudiger Seidel, Gunter Nemitz, Edith Sturmer, Manfred Kaiser