Treatment of waste printed papers with surface active...

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

D - Textiles, Paper

21

C

D21C 5/02 (2006.01)

Patent

CA 2141485

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°C to about 170°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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