Hydrophilic dispersion polymers of diallyldimethyl ammonium chlo

Details Hydrophilic dispersion polymers of diallyldimethyl ammonium chlo Hydrophilic dispersion polymers of diallyldimethyl ammonium chlo

1997-12-05

2000-02-01

Lithgow, Thomas M.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210734, 210735, 210917, 210928, 162189, 162190, C02F 124

Patent

active

060199040

ABSTRACT:
The invention comprises a method for clarifying ink-laden water obtained from the recycling of paper stocks by treating said water with a hydrophilic 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.

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