PROCESS FOR DE-INKING PULPED WASTE PAPER USING AN ANIONIC POLYMER DISPERSANT AND A CATIONIC SURFACTANT FOR PREFERENTIAL FLOTATION

摘要

Waste paper, especially office waste including laser and/or photocopier paper, is subjected to de-inking by pulping in the presence of a water-soluble anionic polymer at a substantially neutral pH and then by flotation in the presence of a cationic surfactant.