C - Chemistry – Metallurgy – 01 – D
Patent
C - Chemistry, Metallurgy
01
D
23/172
C01D 3/14 (2006.01) C01D 3/08 (2006.01) C01D 5/00 (2006.01)
Patent
CA 1197068
ABSTRACT The invention relates to the treatment of brine, and, more par- ticularly, to the treatment of the brine elutriate withdrawn after evaporation of the brine at an elevated temperature to separate some of the sodium chloride thereon.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 a chamber and a NaC1-/KC1-/Na2SO4- salt mixture is separated off by crystallization. The remaining parent solution can be returned to the evaporation stage, without disturbing the equalized balance of the secondary salts in the brine to be processed. The NaC1 present in the salt mixture can be recovered by deposition with refrigerated water and separation of the Na2SO4.
444152
Fetherstonhaugh & Co.
Sulzer-Escher Wyss Ltd
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