Method for reducing kcl tailings loss from evaporation

Details Method for reducing kcl tailings loss from evaporation Method for reducing kcl tailings loss from evaporation

1978-11-13

1980-07-01

Yudkoff, Norman

Chemistry: physical processes

Physical processes

Crystallization

423205, 159 20R, 159 45, B01D 126

Patent

active

042104211

ABSTRACT:
Disclosed is an improved method of concentrating with respect to a first salt an aqueous solution containing the first salt and a second salt, the solubility of the first salt increasing more with increasing temperatures than the solubility of the second salt, by multiple stage evaporation at progressively higher temperatures and backward feed, wherein first salt and second salt is precipitated in an evaporator stage which communicates with an elutriation leg, wherein an aqueous slurry containing first salt and second salt is withdrawn from the elutriation leg and wherein the concentrated solution is forwarded to a step where the first salt is recovered. In the improved method, slurry withdrawn from the evaporator stages is leached with raw feed and/or mother liquor from this step in which the first salt is recovered to dissolve first salt from the slurry and return the dissolved first salt to the evaporator effect.

REFERENCES:
patent: 3155458 (1964-11-01), Fiedelman et al.
patent: 3365278 (1968-01-01), Kelly et al.

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