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

Abstract

The tie-line values of the aqueous mixture (H 2 O + 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.

Improving the Extraction of Tetracycline from Aqueous Solution by the Use of Acetone as an Adjuvant in ATPS Containing Poly(ethylene glycol) and Organic Salts and the Study of Its Phase Behavior

“…The standard excess Gibbs energy is used as a function of temperature and system composition to obtain the activity coefficients of the components. The binary interactions between the molecules lead to the overall mole fraction hypothesis, which states that on a microscopic scale, the mole fraction in one spot in the mixture is not necessarily the same as in another spot. − …”

“…To achieve the best set of compositions, eq was used, which minimized the objective function (OF). In this process, the root-mean-square deviation (RMSD) eq was used to optimize the results. where t , p , and n are the number of tie-lines, number of phases, and number of components, respectively …”

Enhancement of Orthophosphoric Acid Extraction by the Synergic Effect of Tributyl Phosphate and Methyl Isobutyl Ketone in the Quaternary System H2O–H3PO4–TBP–MIBK at 298.2 K

“…Solvent extraction has attracted much attention for the wet process phosphoric acid (WPA) purification, and a wide variety of solvents have been studied as extracting agents, for example, esters, alkanes, and alcohols. − …”