Method for purification and concentration of MgCl.sub.2 -brines

Details Method for purification and concentration of MgCl.sub.2 -brines Method for purification and concentration of MgCl.sub.2 -brines

1981-03-13

1982-07-27

Thomas, Earl C.

Chemistry of inorganic compounds

Halogen or compound thereof

Binary compound containing metal

423554, 23304, 423163, 423178, C01D 306

Patent

active

043417523

ABSTRACT:
Method for producing purified and concentrated MgCl.sub.2 -brine by evaporation and crystallization from brines containing MgCl.sub.2, KCl, NaCl and MgSO.sub.4 involving recirculation of carnallite and part of the final product brine. The carnallite is recirculated to a decomposition step (1) into which the whole or part of the crude brine is also introduced while part of the final product brine is recycled to the evaporation step (2). The method results in a pure end product by a simple process comprising only one evaporation step and without any addition of chemicals.

REFERENCES:
patent: 2479001 (1949-08-01), Burke et al.
patent: 3829559 (1974-08-01), Dancy

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