Oxygen bleaching process for cellulocis pulps with a polyhydric

Details Oxygen bleaching process for cellulocis pulps with a polyhydric Oxygen bleaching process for cellulocis pulps with a polyhydric

1995-06-09

1997-03-11

Alvo, Steven

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Gas, vapor or mist contact

162 72, 162 77, D21C 9147

Patent

active

056097239

ABSTRACT:
An improved oxygen bleaching process wherein the pulp is bleached in an aqueous organic medium wherein a polyhydric alcohol constitutes between 10 and 70% by weight of the medium to produce a pulp having a viscosity at least 2.5 cp higher than a similar pulp bleached using the same conditions in an aqueous atmosphere to the same kappa no. of 8 ml.

REFERENCES:
patent: 3652386 (1972-03-01), Noreus et al.
patent: 4004967 (1977-01-01), Swan et al.
patent: 4622100 (1986-11-01), Godsay et al.

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