Delignification of cellulosic material with an alkaline aqueous

Details Delignification of cellulosic material with an alkaline aqueous Delignification of cellulosic material with an alkaline aqueous

1976-08-30

1978-05-16

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Continuous chemical treatment or continuous charging or...

162 38, 162 61, 162 65, 162 90, D21C 302, D21C 900

Patent

active

040897370

ABSTRACT:
Cellulosic material is delignified with oxygen previously dissolved into a fresh alkaline aqueous medium, all of the oxygen contacting said cellulosic material being introduced into said cellulosic material by said alkaline aqueous medium containing oxygen dissolved therein and the cellulosic material consistency during delignification being such as to form an agglomeration of said cellulosic material and alkaline aqueous medium in the form of a layer without any gaseous space therein.

REFERENCES:
patent: 3024158 (1962-03-01), Grangaard et al.
patent: 3525665 (1970-08-01), Gessner
patent: 3654070 (1972-04-01), Pradt et al.
patent: 3660225 (1972-05-01), Uerreyne et al.
patent: 3701712 (1972-10-01), Samuelson et al.
patent: 3759783 (1973-09-01), Samuelson et al.
patent: 3764464 (1973-10-01), Samuelson
patent: 3832276 (1974-08-01), Roymoulik et al.

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