BSU bulletin. Chemistry. Physics
Bibliographic description:
, , , , , , * PHASE EQUILIBRIUM AND PHASE DIAGRAM FOR 2- 2- THE QUATERNARY SYSTEM (LI+, K+//Cl-, SO4 -H2O) AT 288.15 K // BSU bulletin. Chemistry. Physics. - 2017. №4. . - С. 3-10.
Title:
* PHASE EQUILIBRIUM AND PHASE DIAGRAM FOR 2- 2- THE QUATERNARY SYSTEM (LI+, K+//Cl-, SO4 -H2O) AT 288.15 K
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The phase and physicochemical properties diagrams of the quaternary system (Li+, K+//Cl-, SO4 -H2O) at 288.15 K were constructed using the solubilities, densities, and refractive indices measured. In the phase diagrams of the system there are three invariant points, seven univariant isotherm dissolution curves, and five crystallization regions corresponding to lithium chloride monohydrate (LiCl∙H2O), lithium sulfate monohydrate (Li2SO4∙H2O), potassium chloride (KCl), potassium sulfate (K2SO4), and double salt lithium potassium sulfate (Li2SO4∙K2SO4), where the double salt lithium potassium sulfate (Li2SO4∙K2SO4) is an incongruent double salt. The crystallization area of potassium sulfate (K2SO4) is the largest, and the crystallized zone of lithium chloride monohydrate (LiCl∙H2O) is the smallest. These results indicate that potassium sulfate is easy to saturate and crystallize from solution and that lithium chloride has a high solubility during isothermal evaporation. The solution density and refractive index of the quaternary system change regularly with the increase of K+ concentration.
Keywords:
stable phase equilibrium; phase diagram; lithium sulfate double salt; potassium; crystallization; isotherm; refractive index; invariant points.
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2-
2-
Li H. X., Zeng D. W., Yao Y., Yin X., Li D. D., Han H. J. and Zhou H. Y. Solubility phase diagram of the quaternary system Li+, Mg2+//Cl-, SO4 -H2O at 298.15 K: Experimental Redetermination and Model simulation // Ind. Eng. Chem. Res. 2014. V. 53. P. 7579–7590.
Liu Y. H., Guo Y. F., Yu X. P., Wang S. Q. and Deng T. L. Solid-liquid metastable phase equilibria in the five-component system (Li + Na + K + Cl + SO4 + H2O) at 308.15K // J. Chem. Eng. Data. 2014. V. 59. P. 1685–1691.
Silcock H. L. Solubilities of Inorganic and Organic Compounds: Ternary and multi- component systems of inorganic substances. NY: Pergamon Press, 1979. 3321 p.
Gao S. Y., Song P. S., Xia S. P. and Zheng M. P. Tibet Saline Lake Chemistry: A New Type of Boronm Lithium Salt Lake // Chin. Sci. 2007. Beijing.
Zheng X. Y., Zhang M. G., Xu Y. et al., Salt Lakes in China // Chin. Sci. 2002. Beijing.
Song P. S., Li W., Sun B., Nie Z. Z., Bo L. Z. and Wang Y. S. Recent development on comprehensive utilization of salt lake resources // Chin. J. Inorg. Chem. 2011. V. 27. P. 801– 815.
Zheng M. P. and Liu X. F. Hydrochemistry and minerals assemblages of salt lakes in the Qinghai-Tibet Plateau // Acta Geol. Sin. 2010. V. 84. P. 1585–1600.
Wang S. Q. and Deng T. L. (Solid + Liquid) Isothermal Evaporation Phase Equilibria in the Aqueous Ternary System (Li2SO4 + MgSO4 + H2O) at T = 308.15 K // J. Chem. Thermodyn. 2008. V. 40. P. 1007–1011.
Deng T. L., Yin H. J. and Guo Y. F. Metastable phase equilibrium in the aqueous ternary system Li2SO4 + MgSO4 + H2O at 323.15 K // J. Solution Chem. 2009. V. 38. P. 27–34
Guo Y. F., Gao D. L., Han H. J., Yu X. P., Wang S. Q. and Deng T. L. Metastable phase equilibria in the aqueous ternary system (Na2SO4 + Li2SO4 + H2O) at 308.15 and 348.15 K // Fluid Phase Equilibr. 2013. V. 358. P. 56–59.
Guo Y. F., Liu Y. H., Wang Q., Yu X. P., Wang S. Q. and Deng T. L. Phase equilibrium in the aqueous quaternary system (Na2SO4 + Li2SO4 + H2O) at 288 and 308 K // J. Chem. Eng. Data. 2013. V. 58. P. 2763–2767.
Deng T. L. and Wang S. Q. Metastable phase equilibria of the reciprocal quaternary system containing lithium, sodium, chloride, and sulfate ions at 273.15 K // J. Chem. Eng. Data. 2010. V. 55. P. 4211−4215.
Deng T. L. and Gao J. Metastable phase equilibrium in the aqueous quaternary system (LiCl + MgCl2 + Li2SO4 + MgSO4 + H2O) at 308.15 K // J. Chem. Eng. Data. 2011. V. 56. P. 1452–1458.
Meng L. Z., Yu X. P., Li D. and Deng T. L. Solid-liquid metastable equilibria of the reciprocal quaternary system (LiCl + MgCl2 + Li2SO4 + MgSO4 + H2O) at 323.15 K // J. Chem. Eng. Data. 2011. V. 56. P. 4627–4632.
2-
2-
Li H. X., Zeng D. W., Yao Y., Yin X., Li D. D., Han H. J. and Zhou H. Y. Solubility phase diagram of the quaternary system Li+, Mg2+//Cl-, SO4 -H2O at 298.15 K: Experimental Redetermination and Model simulation // Ind. Eng. Chem. Res. 2014. V. 53. P. 7579–7590.
Liu Y. H., Guo Y. F., Yu X. P., Wang S. Q. and Deng T. L. Solid-liquid metastable phase equilibria in the five-component system (Li + Na + K + Cl + SO4 + H2O) at 308.15K // J. Chem. Eng. Data. 2014. V. 59. P. 1685–1691.
Silcock H. L. Solubilities of Inorganic and Organic Compounds: Ternary and multi- component systems of inorganic substances. NY: Pergamon Press, 1979. 3321 p.
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