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Separation of tetrafluoroethylene and carbon dioxide using ionic liquids

机译：使用离子液体分离四氟乙烯和二氧化碳

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This report describes for the first time that the ionic liquids 1-butyl-3-methylimidazolium hex-afluorophosphate and l-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide can be used as effective solvents in extractive distillation for the separation of an azeotropic mixture containing tetrafluoroethylene and carbon dioxide. The solubility of tetrafluoroethylene was measured at isothermal conditions (about 283-348 K) over a range in pressure from 0 to 1.4 MPa using a volumetric view cell. The solubility of carbon dioxide was measured at four isothermal conditions (about 283-348) K from 0 to 2.0 MPa using a gravimetric microbalance. The binary data were correlated and the feasibility of the extractive distillation process was modeled using ASPEN Plus? simulator. The tetrafluoroethylene and carbon dioxide were efficiently separated using a single absorption column and flash tank. The purity of the tetrafluoroethylene distillate from the top of the absorption column and the purity of the carbon dioxide from the flash tank exceed 99 mol%.
机译：该报告首次描述了离子液体1-丁基-3-甲基咪唑六氟磷酸盐和1-乙基-3-甲基咪唑双（三氟甲基磺酰基）酰亚胺可用作萃取蒸馏中用于分离共沸混合物的有效溶剂含有四氟乙烯和二氧化碳。使用体积观察池在0至1.4 MPa的压力范围内等温条件（约283-348 K）下测量四氟乙烯的溶解度。使用重量微量天平在0至2.0 MPa的四个等温条件（约283-348）K下测量二氧化碳的溶解度。将二元数据进行关联，并使用ASPEN Plus对萃取蒸馏过程的可行性进行建模。模拟器。使用单个吸收塔和闪蒸罐有效地分离了四氟乙烯和二氧化碳。来自吸收塔顶部的四氟乙烯馏出物的纯度和来自闪蒸罐的二氧化碳的纯度超过99mol％。

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