Process for producing stone groundwood pulp from wood chips...

Details Process for producing stone groundwood pulp from wood chips... Process for producing stone groundwood pulp from wood chips...

D - Textiles, Paper

21

B

144/48, 92/55

D21B 1/14 (2006.01) D21B 1/24 (2006.01)

Patent

CA 1081515

ABSTRACT OF THE DISCLOSURE Disclosed is a process for producing atone groundwood pulp from wood chips, by compressing a wood chip mass into an apparent volume corresponding to 70% or less, preferably, from 40 to 60% of the original apparent volume of the wood chip mass and by grinding the compressed wood chip mass, under pressure, with a stone grinder. The wood chips may be treated, before the grinding step, with both or either one of steam and a treating agent, such as sodium monofulfite, sodium disulfite and sodium bicarbonate.

312865

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