Solid–Liquid Equilibria in the Ternary System LiBr–SrBr₂–H₂O at 273.15, 308.15 and 323.15 K

Abstract

The solid–liquid equilibria in the ternary system LiBr–SrBr2–H2O at 273.15, 308.15, and 323.15 K were studied by isothermal dissolution equilibrium method in this work. At three different temperatures, the ternary system LiBr–SrBr2–H2O belongs to hydrate type I saturation. The phase diagram at 273.15 K includes one cosaturation point, two univariant curves, and two crystallization zones corresponding to LiBr·2H2O and SrBr2·6H2O. The other two phase diagrams contain two cosaturation points, three univariant curves, and three crystallization fields corresponding to LiBr·2H2O, SrBr2·2H2O, and SrBr2·6H2O at 308.15 K and LiBr·H2O, SrBr2·2H2O, and SrBr2·6H2O at 323.15 K, respectively. Lithium bromide has an obvious salting-out effect on strontium bromide. The crystallization area of lithium bromide hydrate is the smallest, and lithium bromide is difficult to crystallize out of the solution at different temperatures.