Patents Assigned to Faxe Kalk
  • Method of bleaching
    Patent number: 5188814
    Abstract: The invention concerns a method of bleaching particles containing calcium carbonate by keeping them in contact with an aqueous solution containing hydrogen peroxide and having a pH-value below 8.
    Type: Grant
    Filed: October 28, 1991
    Date of Patent: February 23, 1993
    Assignees: Eka Nobel AB, Faxe Kalk
    Inventors: Pia Hellstrom, Ivan Dalin, Steen Linderstrom-Lang