Paper-pulp deinking method and equipment to implement this metho

Details Paper-pulp deinking method and equipment to implement this metho Paper-pulp deinking method and equipment to implement this metho

1995-03-10

1997-07-22

Lithgow, Thomas M.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Waste paper or textile waste

209170, D21C 502, B03D 124

Patent

active

056500440

ABSTRACT:
A method for deinking paper pulp, wherein the batch of pulp to be deinked is made to circulate to move from top to bottom whereas the air bubbles are introduced at least in the lower part and move from bottom to top, characterized in that the pulp descends from top to bottom while being recycled in several consecutive and superposed stages.

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patent: 4331534 (1982-05-01), Barnscheidt
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patent: 4399028 (1983-08-01), Kile
patent: 4721562 (1988-01-01), Barnscheidt
patent: 4722784 (1988-02-01), Barnscheidt
patent: 4952308 (1990-08-01), Chamberlain
patent: 5028315 (1991-07-01), Cruea
patent: 5242585 (1993-09-01), Krotta
patent: 5454935 (1995-10-01), Magaraggia

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