Stručni rad

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, Kina
W.-W. Zhu ; School of Chemical and Biological Engineering Hechi University, Yizhou, Guangxi, Kina
G.-L. Qin ; School of Chemical and Biological Engineering Hechi University, Yizhou, Guangxi, Kina
Z. Wei ; School of Chemical and Biological Engineering Hechi University, Yizhou, Guangxi, Kina

Sažetak

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.

Ključne riječi

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

Hrčak ID:

126400

URI

https://hrcak.srce.hr/126400

Datum izdavanja:

5.9.2014.

Podaci na drugim jezicima: hrvatski

Posjeta: 1.725 *