Patents Assigned to Ciba-Geigy Aktiengesellschaft
  • Cationically modified, cellulose-containing materials
    Patent number: 4178438
    Abstract: A novel process for the purification of industrial effluents, wherein the effluents are brought into contact with cationically modified, cellulose-containing materials, the cationic constituent of which is bonded to the cellulose part via the grouping of the general formula--O--CH.sub.2 --N<in which the nitrogen belongs to an amide group of the cationic constituent and the oxygen is bonded to the cellulose part, and the cationically modified, cellulose-containing materials possessing such a constituent, are disclosed.
    Type: Grant
    Filed: September 11, 1978
    Date of Patent: December 11, 1979
    Assignee: Ciba-Geigy Aktiengesellschaft
    Inventors: Jaroslav Haase, Peter Liechti, Hans Wegmuller, Rudolf F. Wurster, Quentin Bowes