Measurement and Thermodynamic Modeling of Ternary (Liquid plus Liquid) Equilibrium for Extraction of N,N-Dimethylacetamide from Aqueous Solution with Different Solvents

Liquid-liquid equilibrium (LLE) data for the water + N,N-dimethylacetamide + solvents (chloroform, methyl isobutyl carbinol, methyl isobutyl ketone, isopropyl acetate, or isopropyl ether) ternary systems were determined at 308.2 and 298.2 K and at 101.3 kPa. Distribution coefficients and separation factors were calculated to evaluate the effectiveness of extracting N,N-dimethylacetamide from aqueous solution. The Othmer-Tobias equation and the Hand equation were used to confirm the reliability of the experimental LLE data. The experimental data were correlated by thermodynamic nonrandom two-liquid and universal quasichemical models, and the binary interaction parameter values were obtained from the data correlation.