Method for purification and concentration of MgCl2-brines.

摘要

Method for producing purified and concentrated MgCl2- brine by evaporation and crystallization from brines containing MgCl2, KCI, NaCl and MgSO. 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 crude brine is also introduced while part of the final product brine is recycled to the evaporation step (2). The method resulting in a pure end product by a simple process comprising only one evaporation step and without any addition of chemicals.