Förfarande för behandling av returpapper

摘要

PCT No. PCT/EP90/00422 Sec. 371 Date Sep. 23, 1991 Sec. 102(e) Date Sep. 23, 1991 PCT Filed Mar. 15, 1990 PCT Pub. No. WO90/11402 PCT Pub. Date Oct. 4, 1990.In a process for processing waste paper, aqueous suspensions of pulp are treated with cationic layer compounds precipitated in situ. The separated printing inks, fillers and/or unwanted substances are then removed from the fibrous suspensions in a known manner by flotation or washing out.