Molybdenum compounds as sulfite pulping catalysts

Details Molybdenum compounds as sulfite pulping catalysts Molybdenum compounds as sulfite pulping catalysts

D - Textiles, Paper

21

C

9/13

D21C 3/06 (2006.01) D21C 3/22 (2006.01)

Patent

CA 1170003

ABSTRACT OF THE DISCLOSURE The addition of catalytic amounts of molybdenum introduced as a water-soluble molybdenum compound to the sulfite-pulping liquors, substantially increases the rate of lignin removal during chip digestion. By the use of this catalyst, the time required to delignify softwood chips in sulfite liquor at a maximum pulping temp- erature of 135°C is reduced to approximately 75% of that necessary to remove the same amount of lignin without a catalyst.

381577

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