Phase Equilibrium and Solvation Effect of the Ternary Mixture Solvent System (LiCl + CH3OH + H2O) at 298.15, 308.15 and 318.15 K

  • Xiaoping YuEmail author
  • Huan Wang
  • Yafei Guo
  • Tianlong DengEmail author


The solubility and physicochemical properties, including density and refractive index in the ternary mixture solvent system (LiCl + CH3OH + H2O) at 298.15, 308.15 and 318.15 K were determined using the isothermal equilibrium method. Based on the experimental data, the phase diagrams and physicochemical properties versus composition diagrams at different temperatures were plotted and compared. It was found that the isothermal phase diagram at each temperature consists of one invariant point (LiCl + LiCl·H2O), two univariant curves and two crystalline regions corresponding to LiCl·H2O and LiCl, respectively. The densities and refractive indices in the ternary mixture solvent system at each temperature change regularly with the increase of LiCl concentration. The calculated densities and refractive indices at the three temperatures agree well with the experimental results. The salting-out rate of LiCl solution increases gradually with the increase of CH3OH concentration at each temperature. The results obtained in this work can be used to produce anhydrous LiCl at relatively low temperatures, even room temperature.


Phase equilibrium Ternary mixture solvent system Lithium chloride Methanol 



This study was funded by the National Natural Science Foundation of China (Nos. U1607129 and U1607123); the China Postdoctoral Science Foundation (Nos. 2016M592827 and 2016M592828); the Foundation of Tianjin Key Laboratory of Marine Resources and Chemistry (No. 201601), the Foundation of Tianjin Engineering Center of Marine Chemical Engineering & Technology (No. hyhg201701), and the Yangtze Scholars and Innovative Research Team of the Chinese University (No. IRT_17R81).

Compliance with Ethical Standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Authors and Affiliations

  1. 1.Tianjin Key Laboratory of Marine Resources and Chemistry, College of Chemical Engineering and Materials ScienceTianjin University of Science and TechnologyTianjinChina
  2. 2.College of Chemistry and Materials ScienceNorthwest UniversityXi’anChina

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