The influence of six different solvents on the relative volatility of n-butanol and chlorobenzene system was investigated

which shows that acetophenone has a better performance in this minimum azeotrope system. Isobaric vapor-liquid equilibrium (VLE) data for binary systems of n-butanol-chlorobenzene

n-butanol-acetophenone

chlorobenzene-acetophenone and ternary system of n-butanol-chlorobenzene-acetophenone at 101.33 kPa were measured by using a vapor-liquid equilibrium still. And then

all of the measured VLE values were checked by the area method proposed by Herington and the point-to-point method of Van Ness. Furthermore

the VLE data were correlated by Wilson

NRTL and UNIQUAC activity coefficient

respectively. The binary interaction parameters were used to predict the ternary VLE behavior

which fit with the experimental data. The experimental results indicate that the relative volatility between n-butanol chlorobenzene is changed obviously by adding acetophenone as a solvent at 0.50 mass fraction

which shows that acetophenone is a promising solvent for the separation of the n-butanol and chlorobenzene mixture in extractive distillation. This work provides important engineering data for chemical database and further study in the engineering design.