Solubility and physicochemical properties of lithium molybdate-n-butanol-water solutions at 25°C

Abstract

Solubilities in the Li₂MoO₄-n-C₄H₉OH-H₂O system at 25°C have been studied. New chemical compounds are not formed in the system. The miscibility of the solvents noticeably decreases with increasing Li₂MoO₄ concentration. The C₄H₉OH solubility decreases from 7.45 wt % in neat water to 0.01 wt % in a saturated (44.40 wt %) aqueous solution of Li₂MoO₄. The H₂O solubility in n-C₄H₉OH decreases from 20.48 to 5.50 wt % in the presence of trace amounts of Li₂MoO₄. In the invariant state, saturated liquid phases ($L_{E_1 }$ and $L_{E_2 }$), which are in equilibrium with solid Li₂MoO₄, have the following compositions (wt%): for $L_{E_1 }$, 43.94% Li₂MoO₄, 0.01% C₄H₉OH, and 56.05% H₂O; and for $L_{E_2 }$, 0.0011% Li₂MoO₄, 94.50% C₄H₉OH, and 5.50% H₂O. The density, refractive index, dynamic viscosity, and electrical conductivity of the saturated solutions of the system have been determined. The isotherms have been calculated for the specific and molar volumes, kinematic viscosity, and equivalent and reduced electrical conductivity of the solutions.