Method for de-inking printed waste paper by the washing process

Details Method for de-inking printed waste paper by the washing process Method for de-inking printed waste paper by the washing process

1995-07-20

1997-09-09

Czaja, Donald E.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

162 4, D21C 502

Patent

active

056652046

ABSTRACT:
A process for deinking a printed wastepaper pulp slurry comprising:
(a) adding to a printed wastepaper pulp slurry a deinking composition consisting essentially of a nonionic ethoxylated and propoxylated surfactant of the formula (I):

REFERENCES:
patent: 3354028 (1967-11-01), Illingworth et al.
patent: 4518459 (1985-05-01), Freis et al.
patent: 5102500 (1992-04-01), Darlington
patent: 5302242 (1994-04-01), Richmann et al.
patent: 5304316 (1994-04-01), Urusshibata et al.
patent: 5417808 (1995-05-01), Okamoto et al.
patent: 5460695 (1995-10-01), Kato
Escher Wyss News 1971, "Repulping of Printed Waste Paper by Floation of Printing Ink (Deinking)" by W. Matzke.

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