Method in sulphite pulping

Details Method in sulphite pulping Method in sulphite pulping

D - Textiles, Paper

21

C

9/13

D21C 3/04 (2006.01) D21C 3/22 (2006.01)

Patent

CA 1057008

ABSTRACT OF THE DISCLOSURE In the sulphite pulping, the yield of pulp is increased by the addition of at least one of a selected group of formates to the cooking liquid before the impreg- nation of the wood. The formates have the formula: Image where R is a hexyl group or an unsubstituted or methyl sub- stituted norbornyl group. Desirably formic acid per se is also added to the cooking liquid.

234872

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