Phase Equilibrium Study of the Aqueous Solution of Propanoic Acid with Acetates at Different Temperatures

Abstract

Ternary phase behavior of water + propanoic acid + 3-methylbutyl acetate and water + propanoic acid + propan-2-yl acetate ternary mixtures including solubility and tie-line data was defined at (298.15 to 318.15) K under the pressure of 83.4 ± 1 kPa. The compositions of tie-line and bimodal curves were obtained by refractive index measurements. The phase diagrams show the type-1 behavior of liquid−liquid equilibrium (LLE). The capability of the solvents for the extraction of propanoic acid from aqueous solutions was determined by distribution coefficients and separation factors. The reliability of the experimental tie-line data was ascertained by Othmer−Tobias and Hand correlation equations. The tie-line data were correlated with nonrandom two-liquid (NRTL) and universal quasi-chemical (UNIQUAC) models. The binary interaction parameters of the models were reported. Excellent agreement was observed between the experimental data and the correlated values.

Liquid–Liquid Equilibrium Study of the Ternary Systems (Water + Propionic or Butyric Acids + Kerosene) at T = (293.2, 303.2, and 313.2) K and Ambient Pressure

“…In previous studies, researchers have published LLE data regarding the use of various organic solvents for extracting PA and BA from aqueous solutions. − The literature contains phase equilibrium data for many of these systems, with alcohols, − esters, − ethers, − ketones, − and hydrocarbons being among the most commonly tested solvents.…”