Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – Continuous chemical treatment or continuous charging or...
Patent
1974-08-05
1976-10-19
Bashore, S. Leon
Paper making and fiber liberation
Processes of chemical liberation, recovery or purification...
Continuous chemical treatment or continuous charging or...
162 19, 162 30K, 162DIG8, 23296, 23303, 423207, 423499, D21C 302, D21C 1104
Patent
active
039869237
ABSTRACT:
Sodium chloride is removed from Kraft mill smelts by fractionating the smelt to separate sodium carbonate and sodium sulphate in solid form from sodium sulphide and sodium chloride which usually is contaminated with residual quantities of sodium carbonate and sodium sulphate and is contained in an aqueous solution thereof. Sodium chloride subsequently is separated from the aqueous solution. Various fractionation procedures are described and various procedures for the removal of the sodium chloride in substantially pure form also are described.
REFERENCES:
patent: 1906886 (1933-05-01), Richter
patent: 3698995 (1972-10-01), Rapson
patent: 3746612 (1973-07-01), Rapson et al.
patent: 3909344 (1975-09-01), Lukes
patent: 3945880 (1976-03-01), Lukes et al.
Bashore S. Leon
Erco Envirotech Ltd.
Kratz Peter F.
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