Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

In this work, the solubilities of the salt minerals in quaternary systems potassium chloride magnesium chloride zinc chloride water and potassium chloride magnesium chloride lead chloride water were measured at 373 K using an isothermal dissolution equilibrium method. Phase diagrams were constructed based on compositions of saturated liquid phase and existing equilibrium solid phase. By X-ray powder diffraction identification, a variety of solid forms were determined for the quaternary system KCl MgCl2 ZnCl2 H2O at 373 K. Not only were three single salts KCl, ZnCl2, and MgCl2*6H2O determined but also three double salts KCl*MgCl2*6H2O(Car), 2KCl*ZnCl2, and MgCl2*ZnCl2*5H2O were detected. It also demonstrated that five precipitates KCl, MgCl2*6H2O, KCl*MgCl2*6H2O(Car), KCl*2PbCl2, and PbCl2 were formed in the quaternary system KCl MgCl2 PbCl2 H2O at 373 K.