Process for deinking of recycled paper

Details Process for deinking of recycled paper Process for deinking of recycled paper

1995-01-24

1997-04-22

Redding, David A.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 25, 162 26, 162 76, D21C 502

Patent

active

056225970

ABSTRACT:
A process for deinking recycled paper using a pressurized deinking module to separate ink from paper pulp stock. The addition of salts of imidazolinium based compounds with alkyl, alkenyl and amidoethyl side chains to the pulp slurry at the beginning of the pressurized deinking module cycle removes ink more effectively and results in a brighter recycled paper and an increase in yield of final paper stock.

REFERENCES:
patent: 4451398 (1984-05-01), Patsch et al.
patent: 4720383 (1988-01-01), Drach et al.
patent: 4935096 (1990-06-01), Gallagher et al.
patent: 5286346 (1994-02-01), Engelskirchen et al.

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