Pulping with quinones and hydroquinones

Details Pulping with quinones and hydroquinones Pulping with quinones and hydroquinones

1977-05-25

1980-07-22

Corbin, Arthur L.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 83, 162 90, D21C 302, D21C 322

Patent

active

042138213

ABSTRACT:
A process for the delignification of lignocellulosic material is described wherein the lignocellulosic material is cooked with an alkaline or neutral sulphite pulping liquor, and there is added to the pulping liquor at least 0.001% by weight of an additive compound or mixture of additive compounds selected from quinones and hydroquinones.

REFERENCES:
patent: 2192202 (1940-03-01), Peterson et al.
patent: 2218479 (1940-10-01), Peterson et al.
patent: 2883826 (1959-04-01), Wayzata et al.
patent: 2920010 (1960-01-01), Voiret
patent: 3888727 (1975-06-01), Kenig
patent: 4012280 (1977-03-01), Holton
Bach et al., "New Possibilities for Carbohydrate Stabilization in Alkaline Cooking", Zellstaff und Papier, (i) 3 (1972).

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