Solid–Liquid Phase Equilibria of Ternary System KBr–LiBr–H₂O at 273 and 308 K

Abstract

The solid–liquid phase equilibria of the ternary system KBr–LiBr–H2O at 273 and 308 K were determined by the isothermal dissolution equilibrium method. On the basis of the obtained experimental data, the stable phase diagrams of ternary system KBr–LiBr–H2O at 273 and 308 K were plotted, respectively. The results show that the ternary system is a simple cosaturated type at two different temperatures, and there is neither a solid solution nor a 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 is obviously reduced, which indicates that LiBr has a strong salting-out effect on KBr.

Solid–liquid equilibria in the quaternary system LiBr−NaBr−KBr−H2O and its two ternary subsystems at 288.15 K

“…Phase diagram of ternary system the full diagram (a) and the partially enlarged diagram (b) of system LiBr−KBr−H 2 O at 273.15, 12 288.15 (this work), 308.15, 12 and 323.15 K 19 …”

“…In recent years, the solid–liquid equilibra Li + and Br − rarely measured. In this work, the phase equilibria of two ternary system LiBr−KBr−H 2 O and LiBr−NaBr−H 2 O at 288.15 K have been studied and compared with that at 323 K, 11 and the ternary system LiBr−KBr−H 2 O is also compared with 273 and 308 K 12 . It should be noted that w (LiBr) = 0.66%, w (NaBr) = 52.71% is the transition point of NaBr·2H 2 O and NaBr, but Pelsha did not mark this point as the second invariant point.…”

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

“…The solubility relationships of the binary system LiBr–H 2 O at different temperatures − have been compared, as shown in Figure . Our research group has made a detailed study on the comparison between the CRC’s data and the experimental data of lithium bromide at 273.15 and 308.15 K, which can prove the reliability of the data . There are no solubility data for the binary system LiBr–H 2 O at 323.15 K in the CRC Handbook .…”

Solid–Liquid Equilibria in Reciprocal Quinary System Li+, Na+, K+/Br–, and SO42––H2O at 298.15 K

“…In particular, the studies on multi-temperature phase equilibrium and phase diagram of the lithium bromide-containing system are less carried out. Most of the preliminary works focused on the research of ternary and quaternary systems, such as ternary systems LiBr–NaBr–H 2 O, LiBr–KBr–H 2 O, LiBr–SrBr 2 –H 2 O, LiBr–MgBr 2 –H 2 O, LiBr–CaBr 2 –H 2 O, and LiBr–Li 2 SO 4 –H 2 O, − and related quaternary systems. ,− At present, there are few reports on higher systems, especially with quinary or more. Therefore, it is necessary to systematically study the multitemperature phase equilibria and phase diagrams from the simple to multicomponent system.…”