Process for delignifying raw cellulose

Details Process for delignifying raw cellulose Process for delignifying raw cellulose

D - Textiles, Paper

21

C

D21C 3/02 (2006.01) D21C 9/10 (2006.01) D21C 9/16 (2006.01)

Patent

CA 2088281

ABSTRACT A process for delignifying raw cellulose which comprises a preliminary treatment for impregnating raw cellulose with a monopersulphuric acid solution, a successive filtration with- out washing with recycle of the filtered liquid to the first step, and a treatment, at low temperature and in alkaline sol- ution at a pH higher than 9, of the previously impregnated raw cellulose in order to permit the reaction of the monopersulphuric acid with the lignin contained in the raw cellulose.

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