The effects of ionic liquids on relative volatility of 1-pentene-isoprene system were investigated by experiment. At pressure of 101.3 kPa, vapor-liquid equilibrium data of isoprene, 1-pentene, 2-methyl-l-butene or cyclopentene and DMF+l-hexyl-3-methylimidazolium hexafluorophosphate ([hmim]PF6) four binary systems were measured, and were correlated by NRTL equation. The experimental results showed that the effect of [hmim]PF6 on the relative volatility was the strongest and its suitable concentration was 4%. All the experiment results accorded with the thermodynamic consistency test. By comparing the correlated results with the experimental data, the maximal deviations of both the bubble point temperature and the vapor composition were 1.59℃ and 0.016 4, respectively. The obtained parameters of NRTL models could meet the demand of current engineering design.%采用小型气相循环釜测定了不同离子液体1-戊烯对异戊二烯的相对挥发度(α12)的影响；在101.3 kPa下,测定了异戊二烯、1-戊烯、2-甲基-1-丁烯和环戊烯与二甲基甲酰胺(DMF) +1-己基-3-甲基咪唑六氟硼酸盐([hmim]PF6)4个二组分物系的汽液平衡数据；用NRTL方程对汽液平衡数据进行了关联.实验结果表明,[hmim]PF6对α12影响最大；适宜的[hmim]PF6用量为其在DMF中的含量为4％(w)；4个二组分物系的汽液平衡数据符合热力学一致性检验；用NRTL方程对4个二组分物系进行计算,温度的最大偏差为1.59℃,汽相摩尔分数最大偏差为0.016 4,NRTL方程可用于碳五-DMF+[hmim]PF6物系的热力学数据的计算.
展开▼
