Modified process for preparing pulp for paper making

Details Modified process for preparing pulp for paper making Modified process for preparing pulp for paper making

D - Textiles, Paper

21

C

9/16

D21C 1/00 (2006.01) D21B 1/36 (2006.01) D21C 1/06 (2006.01)

Patent

CA 2024935

ABSTRACT This invention relates to an improved process preparing pulp suitable for papermaking, consisting of short time saturated steam cooking of chips impregnated with alkaline solutions of sulphites in the temperature range of 180 to 210°C, instantaneous pressurizing the reactor with cool nitrogen after cooking to super atmospheric pressure from 25 to 50 atm followed by explosive decompression and fiber refining.

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