2015, №1

сс. 78-85

Phase Equilibria in the System LiOH—H2O at 350—425 °C

2015, №1

сс. 78-85

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M.A. Urusova, V.M. Valyashko

Key words: phase diagrams, solubility, liquid-liquid immiscibility, critical phenomena

The system LiOH—H2O is characterized by the immiscibility phenomena both in
equilibrium with vapor and solid saturated solutions or without solid phase. Solubility
of LiOH increases as a result of immiscibility phenomena at ∼355 °С and further increases
above this temperature up to the melting point. The immiscibility region (g - l1 - l2)
is terminated by the critical phenomena (g = l1 - l2) at ∼390 °С. A separation of liquid
phases is observed at elevated pressures (at ∼39 MPa) and temperatures up to 425 °C.

doi:10.1134/S1990793115080102