水-正已烷-乙醇体系的液液平衡研究

Research on the liguid-liquid equilibrium in system water-n-hexane-ethanol

Four isothermal sections at 298.15K,308.15K,318.15K and 328.15K in system water-n-hexane-ethanol were measured by gas chromatograph method.The innerscaling method was used to determine the concentrations of n-hexane and ethanol in this ternary system.Ethy1 acetate was chosen as the sample of inner-scaling because of its separability and fit retainning time.Acetylacetone was chosen as diluent of the oil phase andn-butyl alcohol was chosen as diluent of the water phase.The experimental data of four isothermal sections at 298.15K,308.15K,318.15K adn 328.15K in system water-n-hexane-ethanol at normal pressure were given.Four schematic figures were also given.The character of these phase diagrams was analysed.They were compared with the phase diagram of system water-n-hexane-methanol.The possible causes of experimental error were discussed.The root mean square error of measurement is 1.47%.

Four isothermal sections at 298. 15K,308.15K,318.15K and 328.15K in system water - n - hexane - ethanol were measured by gas chromatograph method. The inner - scaling method was used to determine the concentrations of n - hexane and ethanol in this ternary system. Ethyl acetate was chosen as the sample of inner - scaling because of its separability and fit retainning time. Acetylacetone was chosen as diluent of the oil phase andn - butyl alcohol was chosen as diluent of the water phase. The experimental data of four isothermal sections at 298.15K,308. 15K,318. 15K adn 328.15K in system water - n - hexane - ethanol at normal pressure were given. Four schematic figures were also given. The character of these phase diagrams was analysed. They were compared with the phase diagram of system water - n - hexane - methanol. The possible causes of experimental error were discussed. The root mean square error of measurement is 1.47%.