Pitzer thermodynamic modeling study on solid–liquid equilibria of the quinary system LiCl–NaCl–CaCl2–SrCl2–H2O at 298.15 K

The Pitzer thermodynamic model for solid–liquid equilibria in the quinary system LiCl–NaCl–CaCl2–SrCl2–H2O at 298.15 K was constructed by combining the proper parameters and solubility product constants of the equilibrium solids for the subsystems in the literature. The solubility data of the systems CaCl2–SrCl2–H2O and LiCl–CaCl2–H2O were used to evaluate the model. The comparisons between the experimental and calculated solubilities indicate that the model is reliable. The solubilities of the quaternary system NaCl–CaCl2–SrCl2–H2O and the quinary system LiCl–NaCl–CaCl2–SrCl2–H2O were calculated, which can be used as a theoretical reference for comprehensive exploitation and utilization of this type of brine resource.