Process for digesting woodchips and digester additives

Details Process for digesting woodchips and digester additives Process for digesting woodchips and digester additives

D - Textiles, Paper

21

C

D21C 3/20 (2006.01) D21C 3/22 (2006.01)

Patent

CA 2417793

The invention relates to a process for digesting woodchips used in papermaking. The process employs a digester additive, which is a mixture of (a) a polyglycoside, and (b) a polyoxyalkylene glycol. The digester additives are compatible and stable at elevated temperatures in the highly alkaline white liquor used in the digestion of woodchips into pulp. The invention also relates to the digester additive compositions.

L'invention concerne un procédé de digestion des copeaux de bois utilisés dans la fabrication du papier. Ce procédé utilise un additif pour lessiveur, qui est un mélange a) de polyglycoside, et b) de polyoxyalkylène glycol. Les additifs pour lessiveur sont compatibles et stables à des températures élevées dans la liqueur blanche très alcaline utilisée dans la digestion des copeaux en pâte. L'invention conserve également des compositions d'additifs pour lessiveur.

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