h.r Haghnazarloo - Graduate Student of School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan.
m.n Lotfollahi - School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran.
a Haghighi Asl - School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan, Iran.
j Mahmoudi - Graduate Student of School of Chemical, Gas and Petroleum Engineering, Semnan University, Semnan.

In this research, LLE data for ternary system of (ethylene glycol + benzene + hexane) at 298.15 K and ternary system of (ethylene glycol + toluene + heptane) at temperatures (308.15 and313.15) K have been measured. The results showed that ethylene glycol as a solvent has a goodselectivity for separation of benzene from hexane and toluene from heptane. Comparing the electivity factors in two different temperatures indicated that, increasing temperature causes increasing selectivity factor

ethylene glycol; heptane ; toluene; extraction; benzene; hexane