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A Self-Assembled Capsule for Propylene/Propane Separation |
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| Authors: | Chuang-Wei Zhou Dr Xue-Zhi Wang Dr Mo Xie Ri-Qin Xia Dr Dong Luo Zhao-Xia Lian Prof Dr Guo-Hong Ning Prof Dr Weigang Lu Prof Dr Xiao-Ping Zhou Prof Dr Dan Li |
| Institution: | 1. College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632 P. R. China
These authors contributed equally to this work.;2. College of Chemistry and Materials Science, Guangdong Provincial Key Laboratory of Functional Supramolecular Coordination Materials and Applications, Jinan University, Guangzhou, Guangdong 510632 P. R. China |
| Abstract: | The development of energy-saving technology for the efficient separation of olefin and paraffin is highly important for the chemical industry. Herein, we report a self-assembled Fe4L6 capsule containing a hydrophobic cavity, which can be used to encapsulate and separate propylene/propane. The successful encapsulation of propylene and propane by the Fe4L6 cage in a water solution was documented by NMR spectroscopy. The binding constants K for the Fe4L6 cage toward propylene and propane were determined to be (5.0±0.1)×103 M−1 and (2.1±0.7)×104 M−1 in D2O at 25 °C, respectively. Experiments and theoretical studies revealed that the cage exhibited multiple weak interactions with propylene and propane. The polymer-grade propylene (>99.5 %) can be obtained from a mixture of propylene and propane by using the Fe4L6 cage as a separation material in a U-shaped glass tube. This work provides a new strategy for the separation of olefin/paraffin. |
| Keywords: | Metal-Organic Cage Propane/Propylene Separation Host-Guest Chemistry Propylene Self-Assembly |