Diallyl dimethyl ammonium chloride copolymers in deinking process water clarification
AssigneeNalco Chemical Company
InventorsPeter E. Reed, Karen R. Tubergen
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Abstract
Novel copolymers of polydiallyl dimethyl ammonium chloride and 3-acrylamido-3-methylbutanoic acid are useful in the clarification of deinking paper mill waste water resulting from the processing of recycled paper stock.
Claims3
A process wherein a coagulating amount of a water soluble polymer is used to coagulate suspended solids from deinking process waters which result from the processing of recycled paper, the improvement which comprises using as the coagulant a polydiallyl dimethyl ammonium chloride copolymer which contains from between 1-30 mole percent of 3-acrylamido-3-methylbutanoic acid and has an intrinsic velocity of at least 0.5.
Dependencies are inferred from the claim text.