The object of this study is to measure the liquid-liquid equilibrium (LLE) data in fluorous solvent (perfluorohexane and Galden (R) HT-135) mixtures, which are used as environmentally benign reaction solvents. The LLE data of perfluorohexane + n-alkane (C-7, C-9, and C-10) mixtures were measured to determine the phase behavior of perfluorohexane+ n-alkane (C-6-C-10) mixtures. The LLE for Galden HT-135 (R) + dibutyl ether/butyl acetate mixtures were measured up to the upper critical solution temperature (UCST). The experimental results for the LLE were represented using the NRTL activity coefficient model. (C) 2013 Elsevier B.V. All rights reserved,