Process for acid sulfite digestion of wood

Details Process for acid sulfite digestion of wood Process for acid sulfite digestion of wood

1980-03-19

1981-10-20

Smith, William F.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

162 84, D21C 306

Patent

active

042959292

ABSTRACT:
The production of chemical pulp by the acid sulfite digestion process is improved by increasing the ratio by weight of combined SO.sub.2 to wood to a range of from 4 to 12 (based on one part of combined SO.sub.2 to 100 parts of dry wood) and by increasing the minimum average rate of heating to the substantially maximum cooking temperature to 40.degree. C. per hour.

REFERENCES:
patent: 1880042 (1932-09-01), Richter
patent: 3523060 (1970-08-01), Herdle et al.

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