HYDROPHILIC DISPERSION POLYMERS FOR THE CLARIFICATION OF DEINKING PROCESS

摘要

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 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.