Process for delignification and bleaching of chemical wood pulps

Details Process for delignification and bleaching of chemical wood pulps Process for delignification and bleaching of chemical wood pulps

1994-10-31

1997-04-15

Alvo, Steven

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Gas, vapor or mist contact

162 72, 162 76, 162 78, D21C 916

Patent

active

056205635

ABSTRACT:
A process of delignifying and bleaching a chemical wood pulp with hydrogen peroxide and dicyandiamide as an activator provides a higher degree of delignification and brightness of the pulp and overcomes problems of fiber degradation. The process comprises adding hydrogen peroxide and dicyandiamide as a bleaching activator to a chemical wood pulp slurry under alkaline conditions.

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