D - Textiles – Paper – 21 – C
Patent
D - Textiles, Paper
21
C
209/54, 204/91.1
D21C 9/10 (2006.01)
Patent
CA 1152940
DELIGNIFICATION AND BLEACHING OF LIGNOCELLULOSIC PULP VIA PHOTO-OXYGENATION ABSTRACT OF THE DISCLOSURE A process for the delignification and bleaching of lignocel- lulosic pulp employing electronically excited oxygen generated in situ which comprises subjecting an aqueous slurry of said ligno- cellulosic pulp having a consistency of from about 0.01% to about 10.0%, by weight of oven-dried pulp, and whose slurry pH is between about 8 and about 13 to irradiation with ultraviolet light while admitting oxygen into said slurry. -47-
366464
Gowling Lafleur Henderson Llp
International Paper Company
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