Patents Assigned to Institut Textile de France-Centre Technique Industriel
  • Use of grafted cellulose for purifying water
    Patent number: 5152896
    Abstract: The invention relates to the use of grafted celluloses, in fibrous form, particularly paper, non-woven web, flock, yarn, woven fabric, comprising quaternary ammonium functions, for eliminating humic substances and nitrates contained in natural water or industrial sewage.The grafted cellulose is for example obtained by radical grafting with the aid of a non-saturated monomer with quaternary ammonium function, particularly quaternized diethyl-amino-ethyl methacrylate.Its capacity is greater than or equal to 0.2 meq/g.
    Type: Grant
    Filed: January 14, 1991
    Date of Patent: October 6, 1992
    Assignee: Institut Textile de France-Centre Technique Industriel
    Inventors: Michel Mazet, Isabelle Rigaudie, Daniel Wattiez, Roger Chatelin, Jean-Francois Combes, Louis Gavet