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Professional paper

https://doi.org/10.15255/KUI.2014.015

Phase Equilibrium of NaNO3/KNO3 in Glycerol + H2O Mixed Solvent System at 288.15 K and 298.15 K

H.-Y. Zhang ; School of Chemical and Biological Engineering Hechi University, Yizhou, Guangxi, PR China
W.-W. Zhu ; School of Chemical and Biological Engineering Hechi University, Yizhou, Guangxi, PR China
G.-L. Qin ; School of Chemical and Biological Engineering Hechi University, Yizhou, Guangxi, PR China
Z. Wei ; School of Chemical and Biological Engineering Hechi University, Yizhou, Guangxi, PR China


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Abstract

Solubility, density, and refractive index were determined for the ternary systems of NaNO3/KNO3 + glycerol + H2O at 288.15 K and 298.15 K. The solubility of the salts was calculated by the method of combining density and refractive index. In all cases the solubility of the salts decreased with the increase in glycerol content. A reverse trend for the refractive indices was observed. However, NaNO3 density tended to decrease and KNO3 density tended to increase with the addition of glycerol in the solution. Moreover, the experimental data were correlated using a four-parameter and seven-parameter empirical equation for the saturated and unsaturated solutions, respectively. Therefore, research of such kind of system has potential theoretical and practical application for the purification process and thermodynamic chemistry.

Keywords

Sodium nitrate; potassium nitrat; glycerol; solubility; density; refractive index

Hrčak ID:

126400

URI

https://hrcak.srce.hr/126400

Publication date:

5.9.2014.

Article data in other languages: croatian

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