| Abstrakt: |
Solid–liquid phase equilibria of the quaternary system (Li+,K+// , –H2O) and its subsystem are very important for the separation of lithium and potassium salts from the salt lake brines. In this paper, the solubilities, densities, refractive indices and pH values of the reciprocal quaternary system (Li+,K+// , –H2O) at 308.15 K were determined experimentally using the isothermal dissolution method. The dry-salt diagram and water-phase diagram were plotted based on the experimental data. The stable phase diagram contains four invariant points, nine univariant curves and six crystallization regions corresponding to Li2CO3, Li2CO3⋅K2CO3, K2CO3⋅1.5H2O, Li2SO4⋅H2O, K2SO4, and Li2SO4⋅K2SO4. Li2CO3 has the largest crystallization field, whereas the Li2CO3⋅K2CO3 crystallization field is the smallest one. [ABSTRACT FROM AUTHOR] |
Full text from SpringerLink