Cellulosic pulp delignification using an acidic bromine-chlorine

Details Cellulosic pulp delignification using an acidic bromine-chlorine Cellulosic pulp delignification using an acidic bromine-chlorine

1976-04-26

1978-06-20

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

8107, 8108R, 162 70, 162 72, 162 73, 162 87, D21C 912

Patent

active

040960293

ABSTRACT:
Efficient lignin removal from cellulosic pulp with decreased cellulose degradation is attained by replacing chlorine with an acidic bromine-chlorine mixture in acidic chlorination of the pulp.

REFERENCES:
patent: 125658 (1872-04-01), Campbell
patent: 1942622 (1934-01-01), Traquair et al.
patent: 2461105 (1949-02-01), Bloch et al.
patent: 2989519 (1961-06-01), Herbst et al.
patent: 3150919 (1964-09-01), Lewin
patent: 3433702 (1969-03-01), Jack et al.
Lewin, "Bleaching & Oxidation of Cellulose by Hypobromite & Hypochlorite Bromide Solutions", TAPPI, 6-1965, vol. 48, No. 6, pp. 333-343.
Giertz, "Developments in Bleaching Processes", TAPPI, vol. 34, No. 5, 5-1951, pp. 209-215.
Anders, Zellstoff und Papier, vol. 4, No. 9, 1955, pp. 257-261.

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