Hydrophilic dispersion polymers for the clarification of deinkin

Details Hydrophilic dispersion polymers for the clarification of deinkin Hydrophilic dispersion polymers for the clarification of deinkin

1996-11-01

1998-05-12

Lithgow, Thomas M.

Liquid purification or separation

Processes

Making an insoluble substance or accreting suspended...

210727, 210733, 210734, 210917, 210928, 162 5, 162189, C02F 124, C02F 156

Patent

active

057500347

ABSTRACT:
The invention comprises a method for clarifying ink-laden water obtained from the recycling of paper stocks by treating said water with a conventional coagulant followed by treatment with a hydrophilic dispersion polymer. The hydrophilic dispersion flocculant of the invention is a copolymer of dimethylaminoethyl (meth)acrylate methyl chloride quat (DMAEA.multidot.MCQ) cationic monomer and (meth)acrylamide (AcAm). Following dosing with the flocculant, 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.

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