Due to the rising cost of energy, new separation processes based on extraction are becoming more attractive than before. Thus, the need for claculating and predicting liquid-liquid equilibria (LLE) compositions has very much increased. The purpose of this study is to determine the binodal curves, tie-lines, plait-point, distribution and selectivity for the ternary systems of acetic acid-water with methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), ethylacetate (EAc), butylacetate (BAc), toluene and o-xylene as solvents at 25℃. And those tie-line data were used to examine thermodynamic consistency. The experimental tie-line data were correlated with NRTL and UNIQUAC models.

에너지 비용의 상승에 따라 추출에 기본원리를 둔 새로운 분리공정에 대한 연구가 많이 진행되고 있으며, 이에 따라 액-액평형 조성의 계산 및 예측에 대한 필요성이 매우 증가하고 있다. 본 연구에서는 공비혼합물과 같은 특성을 나타내는 acetic acid 수용액을 methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), ethylacetate (EAc), butylacetate (BAc), toluene 및 o-xylene을 첨가한 3성분계에 대하여 25℃에서 용해도곡선, tie-line, plait-point, 분배계수와 선택도를 실험을 통해 구하였다. Tie-line 데이터의 열역학적 건전성을 확인하였으며, 실험값을 NRTL 및 UNQUAC 모델식으로 구한 계산값과 비교하였다.