Process for producing chemomechanical and/or...

Details Process for producing chemomechanical and/or... Process for producing chemomechanical and/or...

D - Textiles, Paper

21

C

D21C 3/06 (2006.01) D21B 1/16 (2006.01) D21C 1/04 (2006.01)

Patent

CA 2157886

A process is disclosed for producing chemomechanical and/or chemothermomechanical wood products from lignocellulosic raw materials, such as wood chips. The raw materials are impregnated with a SO2-containing solution ant then subjected to a sulfonating reaction in a gaseous or vapour phase at a pH value equal to 2 or less. When the sulfonating reaction is finished, the raw materials or wood chips are defibrated in a defibrating unit known per se and are crushed down to a preselected fineness degree. The wood product thus obtained is characterized by remarkable solidity and by requiring a reduced specific crushing energy.

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