Process for delignification and bleaching of cellulose pulp

Details Process for delignification and bleaching of cellulose pulp Process for delignification and bleaching of cellulose pulp

D - Textiles, Paper

21

C

8/78.1, 9/16.5

D21C 3/00 (2006.01) D21C 9/00 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1042612

ABSTRACT OF THE DISCLOSURE Cellulose pulp is delignified and bleached using oxygen gas at a pressure of 4 kg/cm2 above atmoshpheric pressure and at a temperature of 90-160°C by treating the pulp admixed with a finely divided, solid magnesium compound, e.g., magnesium hydroxide, oxide or peroxide, at a consistency of 3-50% with the oxygen gas in 0.5-6 hours in the absence of alkali metal hydroxide.

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