Method for sulfite pulping using water-soluble molybdenum-contai

Details Method for sulfite pulping using water-soluble molybdenum-contai Method for sulfite pulping using water-soluble molybdenum-contai

1980-07-14

1982-08-31

Alvo, Steve

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 83, D21C 300, D21C 306

Patent

active

043471030

ABSTRACT:
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 temperature of 135.degree. C. is reduced to approximately 75% of that necessary to remove the same amount of lignin without a catalyst.

REFERENCES:
patent: 4176059 (1979-11-01), Suzuki
patent: 4218284 (1980-08-01), Hultman
Kloow, "Corrosion Inhibitors for Stainless Steel", Pulp and Paper of Canada, vol. 80, No. 8, Aug. 1979.

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