Treatment of brine elutriate

Details Treatment of brine elutriate Treatment of brine elutriate

1983-12-07

1985-10-15

Wyse, Thomas

Chemistry: physical processes

Physical processes

Crystallization

23302R, 23303, 423179, 423499, 423551, B01D 902

Patent

active

045471975

ABSTRACT:
The invention relates to the treatment of brine and more particularly the treatment of the brine elutriate drawn off after evaporation of the brine at an elevated temperature to separate some of the sodium chloride thereon. The crude brine normally contains sodium sulphate and potassium chloride, sometimes to relatively high levels, and the invention is directed primarily at the separation out of these salts. To achieve this, the brine elutriate is cooled, in chamber (12) whereby an NaCl--/KCl--/Na.sub.2 SO.sub.4 -- salt mixture is separated off by crystallization. The remaining parent solution can be returned to the evaporation stage (10), without disturbing the equalized balance of the secondary salts in the brine to be processed. The NaCl present in the salt mixture can be recovered by deposition with refrigerated water and separation of the Na.sub.2 SO.sub.4.

REFERENCES:
patent: 3384459 (1968-05-01), Carter et al.
patent: 3712797 (1973-01-01), Winkler
patent: 4140747 (1979-02-01), Sadan
patent: 4180547 (1979-12-01), Chirico
patent: 4306880 (1981-12-01), Garrett

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