Measurement and prediction of liquid-liquid equilibria for water plus hexane plus hexadecane, water plus toluene plus decane, and water plus toluene plus ethylbenzene ternary systems at high temperatures and pressures

An experimental apparatus based on a flow method was used to measure the liquid-liquid equilibria for three ternary systems: water + hexane + hexadecane at 573 K and 20 MPa, water + toluene + decane at 553 and 573 K and 20 MPa, and water + toluene + ethylbenzene at 553 K and 20 MPa. Furthermore, the phase equilibria for water + toluene + decane and water + toluene + ethylbenzene were predicted by the modified SRK equation of state. An exponent-type and conventional mixing rules were applied for the energy and size parameters of the equation of state, respectively. The predicted results are in good agreement with the experimental results.