本工作研究了苯-乙醇、正庚烷-乙醇两个二元体系从常压到810kPa 的共沸点性质。在此基础上,用共沸点法对这两个二元体系在该压力范围内的加压汽液平衡进行了统一关联,并用单参数Wilson 方程作了相应的研究,获得了具有预测功能的统一关联式,对含苯、正庚烷、乙醇的二元及三元体系的加压汽液平衡进行了预测,与实测值比较,取得了较为满意的结果。 This work studied benzene - ethanol, n-heptane - ethanol two binary system from atmospheric pressure to 810kPa azeotropic point properties. On this basis, the azeotropic boiling point method is used to unify the two vapor pressures of the two binary systems under the pressure range. The single-parameter Wilson equation is used to make the corresponding research. The uniformed Correlation equation was used to predict the vapor-liquid equilibrium of binary and ternary systems containing benzene, n-heptane and ethanol. Compared with the experimental data, satisfactory results were obtained.