Efficient Extraction of Butyric Acid from Aqueous Solution using n-Dodecane: Measurement of Equilibrium Data and Thermodynamic Modeling

Document Type : Original Article

Authors

Faculty of Chemistry, Gilan University, Rasht, Iran

Abstract

In this research, the liquid-liquid equilibrium data of the ternary system (water + n-butyric acid + n-dodecane) were obtained at a temperature of 298.2 K and a pressure of 101.3 kPa. The ternary phase diagram was drawn using data of tie-lines obtained from acid-base and Karl Fischer titrations. Hand and Othmer-Tobias equations were used to check the correlation of data of tie-lines. The obtained fit coefficients (0.997 for both equations) showed that the tie-lines are reliable. The distribution coefficients and selectivity factors in the two-phase region were obtained in the ranges of 1.88 to 2.14 and 343.78 to 122.44, respectively. The values obtained for these two parameters showed that n-dodecane is a high-efficiency solvent for removing butyric acid from the aqueous phase. NRTL equation was used for thermodynamic modeling of experimental data. The obtained binary interactions were examined after validating the data. The quality of the modeling was evaluated by calculating the root mean square deviations (rmsd). The value obtained for it (1.11%) showed that the modeling was done well.

Keywords

Main Subjects

Applied Chemistry Today
Volume 19, Issue 72
September 2024
Pages 95-112

Files

Share

How to cite

Statistics