Process for the delignification and acid bleaching of cellulose

Details Process for the delignification and acid bleaching of cellulose Process for the delignification and acid bleaching of cellulose

1985-07-22

1986-12-02

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Gas, vapor or mist contact

162 76, 162 78, D21C 916

Patent

active

046263195

ABSTRACT:
A process for the delignification and bleaching of cellulose with oxygen and hydrogen peroxide, in which in a given case the delignification is carried out with oxygen in the presence of MgO, and the cellulose subsequently is bleached simultaneously with hydrogen peroxide and oxygen at a pH<5.

REFERENCES:
patent: 3719552 (1973-03-01), Farley et al.
patent: 3759783 (1973-09-01), Samuelson et al.
patent: 4222819 (1980-09-01), Fossum
patent: 4372812 (1983-02-01), Phillips
patent: 4410397 (1983-10-01), Kempf
patent: 4427490 (1984-01-01), Eckert
Kruger et al; "Oxygen/Peroxide Bleaching of Sulphite Pulp", Pulp & Paper Canada; 12-1984, p. 109; presented 10(20-22) 1984, Toronto, Canada.

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