Paper fillers

Details Paper fillers Paper fillers

1979-12-04

1981-08-04

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-fiber additive

162168R, 162168NA, 162174, 162181R, 162181A, 162181B, 162181D, 162183, D21D 300

Patent

active

042820596

ABSTRACT:
An aqueous suspension of particles is treated by introducing into the system an anionic polymeric flocculant and at least one counteracting anionic deflocculant, the activity of the anionic deflocculant being reduced or eliminated by bringing into contact therewith in the system an aqueous solution containing cations having a valency greater than one, a material which generates such cations, or a polycationic organic compound.

REFERENCES:
patent: 3082173 (1963-03-01), Horvitz
patent: 3492225 (1970-01-01), Ryznar
patent: 4115187 (1978-09-01), Davidson

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