Measurement and Modeling of Vapor-Liquid Equilibria for Systems Containing Alcohols, Water, and lmidazolium-Based Phosphate Ionic Liquids
Measurement and Modeling of Vapor-Liquid Equilibria for Systems Containing Alcohols, Water, and lmidazolium-Based Phosphate Ionic Liquids
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DOI：
10.1021/je301374c
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发表时间：
2013-05
影响因子：
--
通讯作者：
Junfeng Wang;Zhibao Li
中科院分区：
文献类型：
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作者：
Junfeng Wang;Zhibao Li
在310 ~ 390 K温度范围内，测定了1-甲基-3-乙基咪唑磷酸二乙酯（[EMM] [DEP]）离子液体（IL）体系的汽液平衡。该体系包括1-丙醇+ [EMIM][DEP]、2-丙醇+ [EMIM][DEP]、水+1-丙醇+ [EMIM][DEP]和水+ 2-丙醇+ [EMIM][DEP]。[EMIM][DEP]分为1个1，3-二甲基咪唑磷酸盐（[MMIM][DEP]）和3个亚甲基（CH 2）电中性基团。然后用修正后的CRAMAC模型对含[EMIM][DEP]的二元体系的汽液平衡实验数据进行了回归，最大平均相对偏差（ARD）为2.7%。新获得的组之间的相互作用参数允许可靠的预测其他二元和三元系统包含[MMIM][EMM]和[EMIM][DEP]没有参数化。结果表明，这两种离子液体都能产生盐析效应，打破醇水混合物的共沸行为。[MMIM][DEP]对共沸物的分离能力比[EMIM][DEP]强。
Vapor liquid equilibiria (VLE) were measured for systems containing 1-methyl-3-ethylimidazolium diethylphosphate ([EMIM] [DEP]) ionic liquid (IL) in the temperature range from 310 K to 390 K. The systems include 1-propanol + [EMIM][DEP], 2-propanol + [EMIM][DEP], water +1-propanol + [EMIM][DEP], and water + 2-propanol + [EMIM][DEP]. [EMIM][DEP] was divided into one 1,3-dimethylimidazolium dimethylphosphate ([MMIM][DMP]) and three methylene (CH2) electrically neutral groups. And then the experimental VLE data for binary systems containing [EMIM][DEP] were regressed using the modified UNIFAC model with the maximum average relative deviation (ARD) of 2.7 %. The newly obtained interaction parameters between groups allowed the reliable prediction of other binary and ternary systems containing [MMIM][DMP] and [EMIM][DEP] without parametrization. It was found that both of the ILs can give rise to the salting-out effect, and lead to a breaking of the azeotropic behavior of alcohols + water mixtures. [MMIM][DMP] shows a higher separation ability for the azeotropic mixture studied than [EMIM][DEP].