Method of producing ultra high yield pulp

Details Method of producing ultra high yield pulp Method of producing ultra high yield pulp

D - Textiles, Paper

21

C

9/13

D21C 3/04 (2006.01) D21B 1/12 (2006.01) D21C 3/06 (2006.01)

Patent

CA 1094263

- ABSTRACT - An ultra high yield chemimechanical pulping process is provided in which softwood chips are cooked, in a liquid phase or a vapour phase, with acid sulphite having a low pH. The treated chips are subsequently refined in an atmospheric and/or thermomechanical refining system yielding pulps of high strength and brightness.

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