Abstract
Solid–liquid phase equilibria of the ternary system (Li2SO4 + Li2CO3 + H2O) and (LiCl + Li2CO3 + H2O) are very important for the separation of lithium salts from the salt lake brines. In this paper, the experimental solubilities, densities, refractive indices, and pH values of the ternary systems (Li2SO4 + Li2CO3 + H2O) and (LiCl + Li2CO3 + H2O) at 308.15 K and 0.1 MPa were investigated with the method of isothermal dissolution equilibrium. In ternary system Li2SO4 + Li2CO3 + H2O, there are one eutectic point and two crystallization regions corresponding to the large area of Li2CO3 and the relative small area of Li2SO4⋅H2O, respectively. In ternary system LiCl + Li2CO3 + H2O, there are also one eutectic point and two crystallization regions corresponding to Li2CO3 and LiCl⋅H2O. Lithium chloride has a strong salting-out effect to lithium carbonate. The crystallization region of Li2CO3 was the largest, indicating Li2CO3 could be easily crystallized and separated from brines. The variation trend of solution densities, refractive indices and pH values in the two ternary systems are similar and change regularly with the increasing of the concentration of lithium sulfate or lithium chloride.
This is a preview of subscription content, log in via an institution to check access.
REFERENCES
A. Somrani, A. H. Hamzaoui, and M. Pontie, Desalination 317, 184 (2013).
Z. Zhou, Q. Wei, and L. Yang, J. Chem. Eng. Data 57, 82 (2012).
P. S. Song, W. Li, B. Sun, et al., Chin. J. Inorg. Chem. 27, 801 (2011).
M. P. Zheng and X. F. Liu, Acta Geol. Sin. 84, 1585 (2010).
T. L. Deng, S. Q. Wang, and Y. F. Guo, Metastable Phase Equilibria and Phase Diagram in Qaidam Basin (Sci. Press, Beijing, 2017).
X. Y. Zheng, M. G. Zhang, Y. Xu, et al., Salt Lakes in China (Sci. Press, Beijing, 2002).
P. S. Song, B. Sun, and D. W. Zeng, Pure Appl. Chem. 85, 2097 (2013).
S. Q. Wang, Y. F. Guo, J. S. Yang, et al., Russ. J. Phys. Chem. A 89, 2190 (2015).
S. H. Sang, Z. L. Zhang, and M. Li, Chem. Res. Chin. Univ. 25, 740 (2009).
T. L. Deng, H. A. Yin, and M. L. Tang, J. Chem. Eng. Data 47, 26 (2002).
S. H. Sang, H. A. Yin, M. L. Tang, et al., Acta Phys. Chim. Sin. 18, 835 (2002).
S. Y. Yan, T. Chen, Q. Liang, et al., Chin. J. Inorg. Chem. 24, 1164 (2008).
F. Yuan, J. Jiang, S. Q. Wang, et al., J. Mol. Liq. 337, 116334 (2021).
S. Q. Wang, Y. Song, X. M. Du, et al., Russ. J. Inorg. Chem. 63, 116 (2018).
Analytical Laboratory of Qinghai Inst. of Salt Lakes at CAS, The Analyses of Brines and Salts, 2nd ed. (Chin. Sci, Beijing, 1988).
N. Zhang, Y. F. Guo, Y. H. Liu, et al., J. Chem. Eng. Jpn. 49, 324 (2016).
V. G. Shevchuk and M. I. Vaisfeld, Russ. J. Inorg. Chem. 9, 1491 (1964).
Y. H. Liu, Y. F. Guo, X. K. Wang, et al., Fluid Phase Equilib. 391, 85 (2015).
S. Q. Wang, X. N. Han, Y. Jing, et al., J. Chem. Eng. Data 61, 1155 (2016).
C. B. Song and R. C. Li, Chem. Ind. Eng. Prog. 35, 2350 (2016).
ACKNOWLEDGMENTS
The work was supported by the Program of the National Natural Science Foundation of China (nos. 22078247, U1707602, and U1507109), the Natural Science Foundation of Hebei Province (B2021202058), the Yangtze Scholars and Innovative Research Team in University of Ministry of Education of China (IRT-17R81) are greatly acknowledged.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
The authors declare that they have no conflicts of interest.
Rights and permissions
About this article
Cite this article
Wang, D., He, J., Jiang, J. et al. Solubilities, Densities, Refractive Indices, and pH Values in the Ternary Systems (Li2SO4 + Li2CO3 + H2O) and (LiCl + Li2CO3 + H2O) at 308.15 K. Russ. J. Phys. Chem. 97, 1102–1107 (2023). https://doi.org/10.1134/S0036024423060304
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1134/S0036024423060304