In the petrochemical industry, it is critical to separate the light olefins/paraffins mixtures via an efficient and economic method. In this work, a series of deep eutectic solvents (DESs) (choline chloride (ChCl)-glycerol (G), ChCl-ethylene glycol (EG), 1-butyl-3-methylimidazolium chloride ([Bmim][Cl])-G, and [Bmim][Cl]-EG) dissolving CuCl were used as novel membrane liquids to fabricate supported liquid membranes (SLMs) for the C₂H₄/C₂H₆ mixture separation. Interactions based on a hydrogen bond network in different DESs were characterized by time-of-flight mass spectroscopy (TOF-MS), nuclear magnetic resonance (¹H NMR), and Fourier transform infrared (FT-IR) spectroscopy. Moreover, by absorption experiments, the Cu⁺ activity was quantitatively described based on a first-order equilibrium model. The effects of DESs species, CuCl concentration, transmembrane pressure, temperature, and time on separation performances were investigated by C₂H₄/C₂H₆ mixture permeation experiments. CuCl/ChCl-EG-based SLMs possessed good permeability and comparable permslectivity, as well as good long-term stability, surpassing the reported polymeric membrane upper bound. Systemic study demonstrated that the strength of the hydrogen bond networks in DESs could be tailored by optimizing the combinations of the HBAs and HBDs, and eventually improved the separation performances of the CuCl/DES-based SLMs.

中文翻译：

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溶解铜^+的深共晶溶剂作为调节介质，用于便于运输的液膜分离乙烯/乙烷

在石油化学工业中，至关重要的是通过一种有效且经济的方法分离轻质烯烃/链烷烃混合物。在这项工作中，一系列深共熔溶剂（DES）（氯化胆碱（ChCl）-甘油（G），ChCl-乙二醇（EG），1-丁基-3-甲基咪唑鎓氯化物（[Bmim] [Cl]）- G，和[Bmim] [Cl] -EG）溶解的CuCl用作新型膜液，以制备用于C ₂ H ₄ / C ₂ H ₆混合物分离的支撑液膜（SLM）。通过飞行时间质谱（TOF-MS），核磁共振来表征不同DES中基于氢键网络的相互作用（¹H NMR）和傅立叶变换红外（FT-IR）光谱。此外，通过吸收实验，基于一阶平衡模型定量地描述了Cu ⁺活性。用C ₂ H ₄ / C ₂ H ₆研究了DESs种类，CuCl浓度，跨膜压力，温度和时间对分离性能的影响。混合物渗透实验。基于CuCl / ChCl-EG的SLM具有良好的渗透性和相当的渗透性，以及良好的长期稳定性，超过了报道的聚合物膜上限。系统研究表明，可以通过优化HBA和HBD的组合来调整DES中氢键网络的强度，最终改善基于CuCl / DES的SLM的分离性能。