Pulping with quinones and hydroquinones

Details Pulping with quinones and hydroquinones Pulping with quinones and hydroquinones

1984-10-24

1986-07-15

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

RE0322032

ABSTRACT:
A process for the delignification of softwood lignocellulosic material is described wherein the lignocellulosic material is cooked with [an alkaline or] a 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); 162-72.
Rydholm "Pulping Processes", Interscience Publishers, (1965) pp. 92, 94, 422-438, 439-440, 614, 628-629.

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