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采用改进的Ｐａｒｔ釜测定了在０．１０１３ＭＰａ下，辛烷－水二元部分互溶体系的汽液相平衡数据，经热力学一致性检验表明，所测的数据是可靠的。采用等温法制定了５～７５℃范围内的液液相平衡数据。实验结果表明，辛烷在水中的溶解度仅为７．３×１０－５～７．５×１０－４，水在辛烷中的溶解度为３．８×１０－３～１．０×１０－１，该体系是互溶度极小的体系。
The vapor-liquid equilibrium data of octane-water binary partial miscible system at 0.1013MPa was measured with a modified Part kettle. The thermodynamic consistency test showed that the measured data were reliable. The isothermal method was used to establish the liquid-liquid equilibrium data in the range of 5 ~ 75 ℃. The experimental results show that the solubility of octane in water is only 7.3 × 10-5 ~ 7.5 × 10-4, the solubility of octane in water is 3.8 × 10-3 ~ 1.0 × 10- 1, the system is a very small mutual solubility system.