Solid–liquid equilibrium, excess molar volume, and deviations in the molar refractivity for the binary and ternary mixtures of Alamine 304-1 with 1-octanol, 2-octanol, and 1-decanol

The solid–liquid equilibrium (SLE) of binary systems containing Alamine 304-1 (tri-dodecylamine), which used as a selective solvent in the extraction of molybdenum (Mo), was measured at atmospheric pressure by the visual method. The experimental SLE data for mixtures of Alamine 304-1 + 1-octanol, Alamine 304-1 + 2-octanol, and Alamine 304-1 + 1-decanol were then correlated to the non-random two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) equations. We correlated the excess molar volume (VE) and deviations in molar refractivity (ΔR) of the aforementioned binary mixtures at 298.15 K using the Redlich–Kister equation. The VE and ΔR of the ternary mixtures Alamine 304-1 + 1-octanol + 2-octanol, Alamine 304-1 + 1-octanol + 1-decanol, Alamine 304-1 + 2-octanol + 1-decanol, and 1-octanol + 2-octanol + 1-decanol were predicted by the Radojkovič equation using the correlated binary Redlich–Kister parameters.

► Alamine 304-1 is selective solvent in the extraction of molybdenum (Mo). ► SLE data for the systems {Alamine 304-1 + 1-octanol}, {Alamine 304-1 + 2-octanol} and {Alamine 304-1 + 1-decanol}. ► NRTL and UNIQUAC models were used for the description of the determined SLE data. ► VE and ΔR the selectivities of the {Alamine 304-1 + 1-octanol}, {Alamine 304-1 + 2-octanol} and {Alamine 304-1 + 1-decanol} were measured.