Dissolving behaviors of alkali metal nitrates in the mixed solvents of CH3CHOHCH2OH-H2O at 15 ℃ and 45 ℃

Abstract

Abstract: The equilibrium solubilities of alkali metal nitrates in the mixed solvents of CH₃CHOHCH₂OH/H₂O (0~1) at 15 ℃ and 45 ℃, respectively, were studied by the of density-refractive index method on a self-made microdevice. The density and refractive index of the saturated solutions were also determined using DMA4500 densimeter and RXA170 refractive index detector at 15 ℃ and 45 ℃, respectively. The solubility and density for the saturated solutions were found to decrease with an increase concentration of 1,2-propylene glycol, while the refractive index trended to increase. The solubility data, density and refractive index of the saturated solutions have been equated for their relationship using four parameters empirical equation. The salting-out effect indicated that the alkaline metal salts were salted out by 1,2-propylene glycol, where the higher the temperature, the slightly bigger the salting-out rate.

Key words: alkali metal nitrate, 1,2-Propylene glycol, solubility, density, refractive index

CLC Number:

O616

ZHANG Hui-ying, LI Shu-ni, ZHAI Quan-guo, OU Yang-miao, JIANG Yu-cheng, HU Man-cheng. Dissolving behaviors of alkali metal nitrates in the mixed solvents of CH₃CHOHCH₂OH-H₂O at 15 ℃ and 45 ℃[J]. Journal of East China Normal University(Natural Sc, 2013, 2013(5): 88-95.

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Dissolving behaviors of alkali metal nitrates in the mixed solvents of CH₃CHOHCH₂OH-H₂O at 15 ℃ and 45 ℃

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