Treatment of waste printed papers with surface active polymeric

Details Treatment of waste printed papers with surface active polymeric Treatment of waste printed papers with surface active polymeric

1995-02-03

1996-08-27

Czaja, Donald E.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 4, D21C 502

Patent

active

055497870

ABSTRACT:
This invention relates to a treatment process of wastepaper for making printing grade paper from newsprints and officewastes using surface active polymer composition including a novel surface active terpolymer. In particular, the invention is concerned with a process for removing ink from an aqueous pulp slurry by treating the pulp with a surface active polymer composing of two to three comonomers in which at least one is a hydrophobe and another is a hydrophil, having a glass transition temperature ranging from about 105.degree. C. to about 170.degree. C., alkali metal salts of the said surface active polymer and the combination of the said surface active polymer with a fatty oil alkoxy derivative or fatty acid soaps.

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