摘要
在101.3 k Pa下,用改进的Othmer釜测定了乙酸乙酯-乙腈-1-辛基-3-甲基咪唑六氟磷酸盐([OMIM]PF_6)三组分物系的等压汽液相平衡数据,并应用NRTL模型对汽液相平衡的数据进行了关联。实验结果表明,[OMIM]PF_6对乙酸乙酯有明显的盐析效应;离子液体的加入使乙酸乙酯-乙腈二组分物系的汽液平衡曲线发生偏离,离子液体加入量越大,偏离程度越大;乙酸乙酯-乙腈-[OMIM]PF_6三组分物系乙酸乙酯的汽相摩尔分数的实验值与计算值的绝对平均偏差为0.004,温度平均偏差为0.4 K。
Isobaric vapor liquid equilibrium（VLE） data of a ternary system, ethyl acetate- acetonitrile- 1-octyl-3-methylimidazolium hexafluorophosphate（ [ OMIM ] PF6）, were measured at 101.3 kPa in a modified Othmer still. The NRTL model was used to correlate the experimental data. The ionic liquid [ OMIM] PF6 exhibited salting-out effect on ethyl acetate, which enhanced the relative volatility. The vapor-liquid equilibrium curve of ethyl acetate and acetonitrile with the ionic liquid deviated from the curve without the ionic liquid. The greater the ionic liquid mole fraction, the greater the deviation from the curve without the ionic liquid. The mean absolute deviations between calculated and measured mole fractions of ethyl acetate in the vapor phase and equilibrium temperature were 0.004 and 0.4 K for the ternary system, respectively.
出处
《石油化工》
CAS
CSCD
北大核心
2016年第2期194-199,共6页
Petrochemical Technology
基金
新疆维吾尔自治区自然科学基金项目(2015211A002)
