Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

ABSTRACT

The solid-liquid phase equilibria of the ternary system KBr-LiBr-H2O at 273 K and 308 K were determined by the isothermal dissolution equilibrium method. Based on the obtained experimental data, the stable phase diagrams of the ternary system KBr-LiBr-H2O at 273 K and 308 K were plotted, respectively. The results show that the ternary system is a simple co-saturated type at two different temperatures, and there is neither solid solution nor double salt in the system. Both of the phase diagrams include one invariant point, two univariant curves and two crystalline regions (where the solids are LiBr*2H2O and KBr, respectively). The crystalline area of KBr is much larger than that of LiBr*2H2O, indicating that the solubility of KBr is much smaller than that of LiBr in the ternary system. The mass fraction of KBr in the equilibrium liquid phase obviously reduces, which indicates that LiBr has strong salting out effect on KBr.