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首页> 外文期刊>Journal of Chemical and Engineering Data: the ACS Journal for Data >Propylene and Propane Solubility in Imidazolium, Pyridinium, and Tetralkylammonium Based Ionic Liquids Containing a Silver Salt
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Propylene and Propane Solubility in Imidazolium, Pyridinium, and Tetralkylammonium Based Ionic Liquids Containing a Silver Salt

机译：含银盐的咪唑鎓，吡啶鎓和四烷基铵离子液体中的丙烯和丙烷溶解度

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摘要

The gas solubility of propane and propylene in seven ionic liquids, 1-ethyl-3-methylimidazolium tetrafluoro-borate (EMImBF4), 1-hexyl-3-methylimidazolium tetrafluor-oborate (HMImBF4), 1-octyl-3-methylimidazolium tetrafluor-oborate (OMImBF4), 3-methylimidazolium nitrate (BMIm-NO3 ) , 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonylimide) (BMImTf2N), methyl-trioctylammonium bis(trifluoromethylsulfonylimide) (MOOONTf2N), and butyltrimethylammonium bis(trifmoro-methylsulfonylimide) (BMMMN Tf2N), is reported. The equilibrium isotherms of both pure gases were measured in the pure ionic liquids and in presence of a silver salt containing the same anion of the ionic liquid in a range of concentration of (0 to 0.77) mol·kg_(IL)~(-1) at temperatures between (288 and 308) K and pressures ranging from (0 to 700) kPa. Henry's law constant values for physical solubility as well as the characteristic parameters for chemical solubility such as chemical equilibrium constants and enthalpies of the chemical reactions between silver cations and propylene are reported. Based upon the experimental results, ionic liquids based on imidazolium cations with less and shorter atkyl substituents improve the selective separation of propylene from these mixtures. Regarding to the structure of the anion it was gathered that ionic liquids with the BF4~- anion, combined with the AgBF4 silver salt, provided the best results in terms of olefin capacity and selectivity. In this article we provide valuable data that evidence that the separation of propane/ propylene gas mixtures by reactive absorption could represent an efficient alternative to the traditional separation process based on cryogenic distillation and serve for the new process design.
机译：丙烷和丙烯在七种离子液体中的溶解度：1-乙基-3-甲基咪唑四氟硼酸酯（EMImBF4），1-己基-3-甲基咪唑四氟硼酸酯（HMImBF4），1-辛基-3-甲基咪唑四氟硼酸酯（OMImBF4），硝酸3-甲基咪唑鎓（BMIm-NO3），1-丁基-3-甲基咪唑鎓双（三氟甲基磺酰亚胺）（BMImTf2N），甲基-三辛基铵双（三氟甲基磺酰亚胺）（MOOONTf2N）和丁基三甲基甲基铵-双（BMFm4） Tf2N）。在纯离子液体中和在含有相同离子液体阴离子的银盐存在下，在浓度范围为（0至0.77）mol·kg_（IL）〜（-1）的情况下，测量两种纯气体的平衡等温线。 ）的温度介于（288至308）K之间，压力介于（0至700）kPa之间。报告了物理溶解度的亨利定律常数值以及化学溶解度的特征参数，例如化学平衡常数和银阳离子与丙烯之间的化学反应焓。根据实验结果，基于咪唑阳离子的烷基取代基越来越少的离子液体改善了丙烯从这些混合物中的选择性分离。关于阴离子的结构，据收集，含BF4-阴离子的离子液体与AgBF4银盐结合，就烯烃容量和选择性而言提供了最佳结果。在本文中，我们提供了有价值的数据，证明通过反应吸收分离丙烷/丙烯气体混合物可以代表传统的基于低温蒸馏的分离方法的有效替代方法，并可以用于新的工艺设计。

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