Liquid-liquid equilibrium data from 294.40 K to 323.15 K are reported for the binary system of ethanol (1) + hexadecane (2). Ternary systems at 298.15 K with six heterocyclic nitrogen-containing compounds were experimentally determined by using tie-line measuring method. The experimental data were correlated by the non random two liquid and universal quasi-chemical equations, and the correlated values were compared with the measured values. Additionally, the extracting capabilities of ethanol for heterocyclic nitrogen-containing compounds were investigated with respect to distribution coefficient and selectivity.