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

ABSTRACT

In view of the characteristic of deep underground brine that is rich in sodium, potassium, magnesium, calcium, strontium, chlorine and bromide in Sichuan basin, solid-liquid equilibria in quinary system NaBr-KBr-MgBr2-SrBr2-H2O were accurately determined at 323 K with the method of isothermal dissolution equilibrium. According to the experimental data, the 3D equilibrium phase diagram was obtained. It consists of ten univariant curves, three invariant points and six crystallization regions. The solids in crystallization regions correspond to NaBr*2H2O, NaBr, SrBr2*6H2O, MgBr2*6H2O, KBr and KBr*MgBr2*6H2O, respectively, of which MgBr2*6H2O has the minimum crystallization region, and KBr has the largest crystallization region, which is bigger than half of the phase diagram. In addition, 2D projections of the saturation surfaces of KBr, SrBr2*6H2O, and MgBr2*6H2O were also analyzed, respectively.