Liquid-liquid equilibria and tic-lines for the ternary (water+ 1-propanol + alpha-pinene, beta-pinene or limonene) and (water + 1-butanol + alpha-pinene, beta-pinene or limonene) mixtures have been measured at T= 298.15 K. The experimental ternary liquid-liquid equilibrium data have been successfully represented using the additional ternary parameters as well as the binary parameters in terms of the extended and modified UNIQUAC models. (c) 2007 Elsevier B.V. All rights reserved.