This paper reports the measurements of liquid + liquid, solid + liquid and solid + liquid + liquid equilibrium data of the water + 2-propanol + 1-undecanol ternary system at temperatures from 275.15 to 288.15 K. The three isothermal phase diagrams show different regions depending on temperature. At 288.15 K a liquid + liquid region is observed, however, below this temperature, solid phases appear. The experimental data have been compared with the ternary water + ethanol + 1-undecanol system at the same temperatures; some differences arise in the shapes of the different regions. Finally, by means of the distribution and selectivity coefficients, the capability of the 1-undecanol as an extractant agent in alcohol dewatering has been analyzed. (C) 2016 Elsevier B.V. All rights reserved.