Process for manufacturing chemimechanical cellulose pulp in...

Details Process for manufacturing chemimechanical cellulose pulp in... Process for manufacturing chemimechanical cellulose pulp in...

D - Textiles, Paper

21

C

9/2

D21C 3/00 (2006.01) D21B 1/12 (2006.01) D21B 1/16 (2006.01) D21C 3/22 (2006.01) D21C 9/10 (2006.01)

Patent

CA 1070907

ABSTRACT OF THE DISCLOSURE A process is provided for the manufacture of chemimechanical cellulose pulp in high yields within the range from about 65 to about 95% from particulate lignocellulosic material which comprises subjecting particulate lignocellulosic material to a mild partial digestion in the presence of a delign- ifying agent, and then mechanically defibrating the partially digested material, the improvement which comprises blending the partially digested lignocellulosic material before defibration is complete with waste bleaching liquor from a lignin-preserving bleaching process cooled to a temperature not exceeding 40°C.

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