Vapor-liquid equilibrium (P,T,x) of water/ethylene carbonate was measured at T = (312.91 to 383.13) K by the ebulliometric method. Liquid-liquid equilibria of water/propylene carbonate and water/butylene carbonate systems were measured at atmospheric pressure and T = (280.65 to 293.15) K using analytical sampling techniques. The experimental results were correlated with a NRTL model.