Interstage treatment of mechanical pulp

Details Interstage treatment of mechanical pulp Interstage treatment of mechanical pulp

D - Textiles, Paper

21

C

92/52

D21C 3/00 (2006.01) D21B 1/12 (2006.01) D21B 1/16 (2006.01) D21C 9/16 (2006.01)

Patent

CA 1320863

INTERSTAGE TREATMENT OF MECHANICAL PULP ABSTRACT OF THE DISCLOSURE A two-stage pulp refining system in which the fibrous material from the first stage refiner is in contact with an alkaline bleaching solution between refining stages at a temperature of 32-96°C and at a consistency of 15-25% on an oven dry basis. The material is then diluted and then pressed to a consistency of at least 20% and passes through the second stage refiner.

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