Process of delignification and bleaching a lignocellulose produc

Details Process of delignification and bleaching a lignocellulose produc Process of delignification and bleaching a lignocellulose produc

1974-12-18

1977-02-15

Bayshore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

8108R, 8108A, 162 87, 162 88, 162 90, D21C 912, D21C 914

Patent

active

040081206

ABSTRACT:
The delignification and bleaching of lignocellulosic products is effected by mixing an aqueous suspension of the lignocellulosic product with a chlorine-containing substance and an oxygen-containing substance, simultaneously or sequentially, and they, by reaction in situ, give rise to gases in the nascent state. The chlorine and/or oxygen are in the so-called "singlet" state, or in a state of higher energy. The treatment occurs at a temperature below 100.degree. C and for a time less than 60 minutes.

REFERENCES:
patent: 1736080 (1929-11-01), Heimann et al.
patent: 2465327 (1949-03-01), McEwen
patent: 3423282 (1969-01-01), Rerolle et al.
patent: 3663357 (1972-05-01), Liebergott
patent: 3719552 (1973-03-01), Farley et al.
patent: 3806404 (1974-04-01), Liebergott et al.
patent: 3865685 (1975-02-01), Hebbel et al.
A.P.C., Application of Scheller et al., Ser. No. 303,913, Published July 13, 1943. 162-178.

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