Alkali/oxygen gas digestion of wood

Details Alkali/oxygen gas digestion of wood Alkali/oxygen gas digestion of wood

D - Textiles, Paper

21

C

9/16.5

D21C 3/00 (2006.01) D21C 3/02 (2006.01) D21C 3/22 (2006.01)

Patent

CA 1042160

PROCESS FOR THE PRODUCTION OF CELLULOSE PULP FROM WOOD BY DIGESTION OF THE WOOD WITH ALKALI AND OXYGEN ABSTRACT OF THE DISCLOSURE A process is provided for the production of cellulose pulp from wood which comprises digesting the wood with oxygen gas and alkali in aqueous solution in a digestion zone; detaching cellulose fibers from the surface of the wood in the course of the digestion and in the presence of digestion liquor; suspending the detached fibers in digestion liquor; removing such detached fibers from the digestion zone, as the digestion of the wood continues; and continuing the digestion of the remaining wood with oxygen and wood with oxygen and alkali in aqueous solution to form cellulose pulp.

208553

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