Method for treating ligno-cellulosic materials

Details Method for treating ligno-cellulosic materials Method for treating ligno-cellulosic materials

D - Textiles, Paper

21

C

D21C 3/00 (2006.01) D21B 1/12 (2006.01) D21C 3/02 (2006.01) D21C 9/08 (2006.01)

Patent

CA 2670040

The present invention relates to a method for treating pectin-containing ligno- cellulosic raw materials in a high-yield pulping process utilizing one or more treatment stages at alkaline conditions. The invention provides a method for controlling the alkaline treatment step, wherein the alkali is applied at a low temperature treatment stage before one or more consecutive treatment stages at the same or higher temperature. The present invention also provides pulp, paper, board or tissue obtained with said method.

La présente invention concerne un procédé de traitement de matériaux bruts ligno-cellulosiques contenant de la pectine dans un procédé de défibrage à rendement élevé utilisant un ou des stades de traitement dans des conditions alcalines. L'invention concerne un procédé de contrôle de l'étape de traitement alcalin, l'alcalin étant appliqué dans un stade de traitement à faible température avant un ou des stades de traitement consécutifs à la même température ou une température supérieure. La présente invention concerne également les pulpe, papier, carton ou tissu obtenus avec ledit procédé.

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