Ternary Liquid–Liquid Equilibrium for Phosphoric Acid Extraction from Aqueous Solutions with 1‑Pentanol or Methyl Butyl Ketone at T = (298.2, 308.2, and 318.2) K

The tie-line values of the aqueous mixture (H2O + phosphoric acid + organic solvents) were checked at several temperatures and air pressures. Methyl butyl ketone or 1-pentanol was selected as the organic solvent. Solubility data were specified for an aqueous ternary mixture employing the cloud point measurements. All the ternary mixtures exhibit the type-1 liquid–liquid phase behavior system. Experimental data were determined employing the refractive index method, the Karl–Fischer technique, and acidimetric titration. Binary interaction parameters were predicted employing liquid–liquid equilibrium modeling. The NRTL and UNIQUAC models were employed to define which model is more reliable. The trustworthiness of the experiment outcome was approved by considering the Hand and Othmer-Tobias equations. Selectivity factors and distribution coefficients were derived to determine the solvents’ extraction capacity. The effect of temperature change was checked on the solubility curve and extraction process at different temperatures.