Liquid-liquid equilibria for the systems 2-ethoxy-benzenamine + CH3(CH2)nCH3 (n = 6,8,10,12) and 4-ethoxy-benzenamine + CH3(CH2)nCH3 (n = 5,6)

Abstract Liquid-liquid equilibria (LLE) phase diagrams have been determined for the systems: 2-ethoxy-benzenamine + octane, or +decane, or +dodecane, or +tetradecane and for 4-ethoxy-benzenamine + heptane, or +octane. The experimental method used is based on the observation, by mean of a laser scattering technique, of the turbidity produced on cooling when a second phase takes place. All the mixtures show an upper critical solution temperature, which increases with the alkane size. Dipolar interactions between like molecules become stronger in the sequence: 2-ethoxy-benzenamine