De-inking of waste papers.

摘要

PCT No. PCT/EP89/01364 Sec. 371 Date May 23, 1991 Sec. 102(e) Date May 23, 1991 PCT Filed Nov. 14, 1988 PCT Pub. No. WO90/05806 PCT Pub. Date May 31, 1990.The invention relates to a process for deinking wastepaper in the presence of at least partly water-soluble polymers and/or copolymers containing amino and/or ammonium groups. Two examples of appropriate polymers/copolymers are neutralized polyethyleneimine and quaternized hydroxyethyl cellulose.