During the process of oxidizing cyclohexene to produce 1,2-epoxycyclohexane by hydrogen peroxide,many byproducts have generated.In order to get 1,2-epoxycyclohexane of high purity,the vapor-liquid equilibrium（VLE） data of cyclohexene（1）-1,2-epoxycyclohexane（2）-cyclohexanol（3） ternary system were studied at 101.33 kPa by an improved EC-2 VLE still.The VLE data were predicted by Wilson equation.Based on Wilson equation consort parameters which were obtained by fitting the VLE experiment data of three corresponding binary system,the VLE experiment data were correlated by Wilson equation,using the error sum squares of vapor composition as the objective function.Variations between the values from the predictive value,theoretical calculation and the experimental data are very minor,which indicated that the experiment data are suitable for the engineering design.%H2O2氧化环己烯制备环氧环己烷时有环己醇等很多副产物产生,同时还有未反应完的环己烯留在反应液里。为了获得较纯的环氧环己烷需采用精馏将副产物和环己烯分离出来,精馏提纯需要相关体系的汽液平衡数据,因此采用改进的EC-2汽液平衡釜测定常压（101.33 kPa）下环己烯-环氧环己烷-环己醇三元体系汽液平衡数据。利用二元系汽液平衡数据拟合得到的Wilson方程配偶参数预测该三元体系的汽液平衡数据,并以汽相组成的误差平方和作为目标函数,用Wilson方程关联实验数据,结果表明预测值及关联值与实验值偏差较小,可满足工程上分离设计的需要。
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