Process for manufacturing chemo-mechanical and/or...

Details Process for manufacturing chemo-mechanical and/or... Process for manufacturing chemo-mechanical and/or...

D - Textiles, Paper

21

C

D21C 1/04 (2006.01) D21B 1/16 (2006.01) D21C 3/20 (2006.01)

Patent

CA 2067129

2067129 9105102 PCTABS00004 In a process for manufacturing chemo-mechanical and/or chemo-thermo-mechanical wood pulps, raw materials containing lignocellulose, such as wood shavings, wood chips, pre-ground wood or sawdust, are first impregnated with an aqueous alcoholic SO2 solution and then heated to a temperature between 50 and 170 ·C for a period of 1 to 300 minutes. The wood shavings are then ground to the desired degree of fineness in a defibrinating device which is known per se. The process makes it possible to achieve up to 50 % reduction in grinding energy in comparison with known chemo-thermo-mechanical processes.

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