Sulphite pulping process

Details Sulphite pulping process Sulphite pulping process

D - Textiles, Paper

21

C

D21C 1/06 (2006.01) D21C 3/02 (2006.01) D21C 3/20 (2006.01) D21C 3/22 (2006.01)

Patent

CA 2198485

The present inventon relates to a sulphite fusion process for the production of celluloses using alkaline monosulphite solutions, organic solvents and quinone derivatives. The raw material to be fused is treated in a special impregnation step with either a solvent-free monosulphite solution or a solvent-water mixture.

L'invention concerne un procédé de dissolution au sulfite qui permet de produire des pâtes de cellulose au moyen de solutions alcalines de monosulfite, de solvants organiques et de dérivés quinone. Dans une étape particulière d'imprégnation, le matériau brut à dissoudre subit un traitement avec une solution de monosulfite exempte de solvant ou avec un mélange solvant-eau.

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