Method for making a soluble sulfite additive for use in a pulp m

Details Method for making a soluble sulfite additive for use in a pulp m Method for making a soluble sulfite additive for use in a pulp m

1977-07-08

1978-08-29

Bashore, S. Leon

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With regeneration, reclamation, reuse, recycling or...

210 30R, 210 38A, 423519, D21C 1102

Patent

active

041101545

ABSTRACT:
Sodium bisulfite, for use in the acid digestion of wood to produce pulp is obtained for the process by passing calcium bisulfite through a strong cation exchange resin in the sodium form and regenerating the exchanger with sodium chloride. The calcium bisulfite for the process can be obtained in a known manner, for instance, in an acid tower of the sulfite pulp industry or by passing sulfur dioxide through milk of lime. The process avoids environmental pollution caused by the usual discharge into streams of waste calcium salts from the older sulfiting processes and by the release into the atmosphere of sulfur dioxide containing combustion gases.

REFERENCES:
patent: 1378616 (1921-05-01), Richter
patent: 1934655 (1933-11-01), Bradley et al.
patent: 2042478 (1936-06-01), Miller et al.
patent: 2392435 (1946-01-01), Tyler
patent: 2656249 (1953-10-01), Gray et al.
patent: 2696424 (1954-12-01), Schoeffel
patent: 2736635 (1956-02-01), Haywood
patent: 2778714 (1957-01-01), Kasper et al.
patent: 2823120 (1958-02-01), Parrett
patent: 3083078 (1963-03-01), Manchester et al.
patent: 3496093 (1970-02-01), Camp
patent: 3819802 (1974-06-01), Robinson
Pulp & Paper, vol. I, Casey, Interscience Publishers, 1952, p. 128.

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