C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/24 (2006.01) B01D 21/01 (2006.01) C02F 1/52 (2006.01) C02F 1/56 (2006.01) C08F 220/54 (2006.01) C08F 226/04 (2006.01) C08K 3/30 (2006.01) C08L 39/00 (2006.01) D21C 5/02 (2006.01)
Patent
CA 2351855
The invention comprises a method for clarifying ink-laden water obtained from the recycling of paper stocks by treating said water with a hydrohilic dispersion polymer. The hydrophilic dispersion polymer of the invention is a copolymer of a diallyl N,N-disubstituted ammonium halide cationic monomer and (meth)acrylamide (AcAm). Following dosing with the polymer, a floc is formed. The floc contains ink and impurities which are removed from the water process stream by means of solid liquid separation; the solid liquid separation comprising a dissolved air flotation method. A preferred copolymer is formed from DADMAC and AcAm.
L'invention concerne un procédé servant à clarifier de l'eau chargée d'encre provenant du recyclage de charges de papier et consistant à traiter cette eau au moyen d'une dispersion hydrophile de polymère. Ce polymère est un copolymère d'un monomère cationique d'halogénure d'ammonium de diallyl N,N-disubstitué et de métacrylamide (AcAm). Suivant le dosage avec le polymère, on obtient un floculat. Ce floculat contient de l'encre et des impuretés qu'on supprime du flux de traitement d'eau au moyen d'un procédé de séparation entre solides et liquides qui consiste à faire flotter de l'air dissous. On obtient un copolymère préféré à partir de DADMAC et d'AcAm.
Shing Jane Beryl Wong
Tubergen Karen
Mccarthy Tetrault Llp
Nalco Chemical Company
Ondeo Nalco Company
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