| 摘要 |
This invention is directed to a method of removing color bodies from paper mill waste water comprising adding to the water an effective color-removing amount of a hydrophilic cationic dispersion polymer prepared by polymerizingi. a cationic diallyl-N,N-disubstituted ammonium monomer of formula wherein R1 and R2 are independently C1-C20 alkyl, aryl, alkylaryl or arylalkyl and X is an anionic counterion andii. an acrylamide monomer of formula wherein R3 and R4 are independently hydrogen, C1-C10 alkyl, aryl or arylalkyl; R5 is hydrogen or methyl and R6 and R7 are independently hydrogen or C1-C10 alkyl,in an aqueous solution of a polyvalent anionic salt wherein the polymerization is carried out in the presence of a dispersant.
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