Non-sulfur pulping process for corrugating medium using sodium c

Details Non-sulfur pulping process for corrugating medium using sodium c Non-sulfur pulping process for corrugating medium using sodium c

1974-06-13

1976-05-04

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

Treatment with particular chemical

D21C 302

Patent

active

039545539

ABSTRACT:
A cooking liquor for the pulping of hardwoods which completely eliminates the use of all sulfur containing compounds is disclosed. The cooking liquor contains 15 to 50% of the total chemical as sodium hydroxide and 50 to 85% of the total chemical as sodium carbonate, the preferred liquor contains about 20% by weight of sodium hydroxide and 80% by weight of sodium carbonate. No adverse effect on the properties of the corrugating medium produced from such a liquor is observed when compared with the medium produced by the conventional neutral sulfite semichemical process.

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Abstract No. 3873, "Studies on Japanese Paper", p. 867, Institute of Paper Chem. Abstract Bulletin, Vol. 34, Feb. 1964.
Pulping Processes, Rhydholm, Interscience Publishers, N.Y., 1967, p. 683.
Pulping Processes, Rhydholm, Interscience N.Y., N.Y. 1967, p. 412.

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