CUI Ruizhi, LI Wu, DONG Yaping, et al. Measurements and calculations of solid-liquid equilibria in quaternary system LiCl-MgCl2-CaCl2-H2O at 298 K[J]. CIESC Journal, 2018, (10): 4148-4155. DOI: 10.11949/j.issn.0438-1157.20180383.
CUI Ruizhi, LI Wu, DONG Yaping, et al. Measurements and calculations of solid-liquid equilibria in quaternary system LiCl-MgCl2-CaCl2-H2O at 298 K[J]. CIESC Journal, 2018, (10): 4148-4155. DOI: 10.11949/j.issn.0438-1157.20180383.DOI:
Solid-liquid equilibria in the quaternary system LiCl-MgCl2-CaCl2-H2O at 298 K were studied by the method of isothermal solution saturation method. Using the experimental data
the phase diagram and the relevant water diagram of the quaternary system were obtained. The results show that the phase diagram of the quaternary system consists of seven crystallization fields
eleven univariant curves
and five invariant points. In addition to four simple salts CaCl2·6H2O
CaCl2·4H2O
MgCl2·6H2O and LiCl·H2O
the three double salts LiCl·MgCl2·7H2O
LiCl·CaCl2·5H2O and 2MgCl2·CaCl2·12H2O also crystallizes from the saturated solutions. The crystallized area of single salt MgCl2·6H2O is the largest because of its smallest solubility. The solubility of the quaternary system at 298 K was calculated by Pitzer model using the parameters reported in the literature. The calculated results are basically consistent with the experimental data.