Solubilities and tie line data were measured for seven ternary systems (methanol+water+n-butanol, n-propanol+water+n-butanol, n-propanol+water+n-amylalcohol, 2-propanol+water+n-amylalcohol, methanol+water+n-heptane, n-propanol+water+n-heptane, 2-propanol+water+n-heptane) using new experimental apparatus for liquid-liquid equilibria. NRTL parameters were determined using experimental tie line data and were confirmed by liquid-liquid equilibrium calculations of the components of both liquid phases from the feed components.