Solvent vapor extraction of wood

Details Solvent vapor extraction of wood Solvent vapor extraction of wood

D - Textiles, Paper

21

C

9/70

D21C 1/00 (2006.01) D21B 1/02 (2006.01)

Patent

CA 1105660

Abstract of the Disclosure Wood containing a relatively high concentra- tion of solvent-extractable organic substances is extracted with the hot vapor of a chlorinated solvent such as perchloroethylene to reduce the proportion of these materials. Pulpwood of high resin content is advantageously treated by the process to minimize the accumulation of pitch during sulfite pulping. 18,255-F

273111

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