Oxygen-alkali delignification of lignocellulosic material in the

Details Oxygen-alkali delignification of lignocellulosic material in the Oxygen-alkali delignification of lignocellulosic material in the

1976-12-27

1978-05-02

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With washing

162 65, 162 70, 162 76, 162 79, 162 80, 162 81, 162 86, 162 89, D21C 100, D21C 302, D21C 304

Patent

active

040873188

ABSTRACT:
A process is provided for the delignification of lignocellulosic material wherein the lignocellulosic material, prior to the delignification, is treated with water or an aqueous solution to remove compounds which catalyze the degradation of carbohydrates and then the delignification is carried out with oxygen and alkali in the presence of a manganese compound to improve the selectivity of the delignification and increase the rate of delignification.

REFERENCES:
patent: 1860432 (1932-05-01), Richter
patent: 2511096 (1950-06-01), Bate
patent: 2811518 (1957-10-01), Mitchell et al.
patent: 3701712 (1972-10-01), Samuelson et al.
Landucci et al, "Influence of Metal & Iodide Ions in Oxygen Pulping of Southern Pine", A.B.I.P.C., vol. 44, No. 6, 7-1973, #6161.

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