Floatation process for deinking printed waste paper

Details Floatation process for deinking printed waste paper Floatation process for deinking printed waste paper

D - Textiles, Paper

21

C

9/1

D21C 5/02 (2006.01)

Patent

CA 1325084

ABSTRACT OF THE DISCLOSURE A flotation process for the de-inking of printed waste-paper by treating the paper pulp in the pulper at alkaline pH-values by means of alkali silicate, oxidative bleaches and separating the loosened printing-ink particles from the fibrous material suspension by flotation, in which protein fatty acid condensates are added finely distributed, possibly together with dispersing agents, in a solution or dispersion which is fluid at normal temperature.

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