Process for the flotation of fillers from waste paper

Details Process for the flotation of fillers from waste paper Process for the flotation of fillers from waste paper

D - Textiles, Paper

21

C

9/1

D21C 5/02 (2006.01)

Patent

CA 1289304

ABSTRACT OF THE DISCLOSURE Process for the separation of fillers and paper fibers by flotation whereon, after flotation of the printing ink, 1. water-soluble salts of trivalent metal ions are added to the aqueous paper pulp suspensions and wherein pH values of 4.5 to 9 are present, and 2. the paper pulp suspensions are floated after addition of 0.1 to 8 g of anionic surfactants per kg paper pulp.

561538

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