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

Abstract

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.