Process for manufacturing bleached pulp with reduced chloride pr

Details Process for manufacturing bleached pulp with reduced chloride pr Process for manufacturing bleached pulp with reduced chloride pr

1995-07-10

1997-07-08

Czaja, Donald E.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Gas, vapor or mist contact

162 89, D21C 9153

Patent

active

056456875

ABSTRACT:
A process for bleaching wood pulp is provided comprising subjecting the wood pulp, after brown stock washing, to an oxygen delignification stage, a washing sequence, a first chlorine dioxide or ozone bleaching stage, an oxidative extraction stage, an ozone activation stage followed by a chlorine dioxide bleaching stage in the absence of an intermediate washing stage.

REFERENCES:
patent: 4959124 (1990-09-01), Tsai
patent: 5133946 (1992-07-01), Schwarzl
patent: 5164043 (1992-11-01), Griggs et al.

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