During the process of oxidizing cyclohexene to produce 1,2-epoxycyclohexane by hydrogen peroxide, many byproducts are generated，including cyclohexanol, cyclohexanone and etc. In oder to obain high purity 1,2-epoxycyclohexane, the byproducts must be removed through rectification. Refining 1,2-epoxycyclohexane through rectification needs the vapor-liquid equilibrium (VLE) data of the relative system, so the VLE data of 1,2-epoxycyclohexane-cyclohexanol system were studied at 101.33 kPa by an improved EC-2 vapor-liquid equilibrium still, and then thermodynamic consistency of the data was tested by Herrington’s method.Very good result was obtained.The VLE data were correlated by Wilson and NRTL equation, using the error sum squares of vapor phase composition as target function.Variations between values from theoretical calculation and experimental data are very minor, which indicatesing that the experiment data are suitable for the engineering design.
