High‐Flux High‐Selectivity Metal–Organic Framework MIL‐160 Membrane for Xylene Isomer Separation by Pervaporation,Angewandte Chemie International Edition

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High‐Flux High‐Selectivity Metal–Organic Framework MIL‐160 Membrane for Xylene Isomer Separation by Pervaporation
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-10-19 , DOI: 10.1002/anie.201807935
Xiaocao Wu ₁ , Wan Wei ₂ , Jianwen Jiang ₂ , Jürgen Caro ₃ , Aisheng Huang ₁

Affiliation

Separation of p‐xylene (kinetic diameter ca. 0.58 nm) from its bulkier isomers (o‐xylene and m‐xylene, ca. 0.68 nm) is challenging, but important in the petrochemical industry. Herein, we developed a highly selective and stable metal–organic framework (MOF) MIL‐160 membrane for selective separation of p‐xylene from its isomers by pervaporation. The suitable pore size (0.5∼0.6 nm) of the MIL‐160 membrane selectively allows p‐xylene to pass through, while excluding the bulkier o‐xylene and m‐xylene. For the separation of equimolar binary p‐/o‐xylene mixtures at 75 °C, high p‐xylene flux of 467 g m⁻² h⁻¹ and p‐/o‐xylene selectivity of 38.5 could be achieved. The stability of MIL‐160, ensured the separation performance of the MIL‐160 membrane was unchanged over a 24 h measurement. The high separation performance combined with its high thermal and chemical stability makes the MIL‐160 membrane a promising candidate for the separation of xylene isomers.

中文翻译：

高通量高选择性金属有机骨架MIL-160膜，用于通过全蒸发分离二甲苯异构体

分离p从其笨重异构体二甲苯（动力学直径约0.58纳米）（ø二甲苯和米二甲苯，约0.68纳米）是具有挑战性的，但在石化工业中重要的。本文中，我们开发了一种高度选择性和稳定的金属有机骨架（MOF）MIL-160膜，用于通过全蒸发从对映异构体中选择性分离对二甲苯。在MIL-160膜的合适的孔径大小（0.5〜0.6纳米）选择性地允许p二甲苯穿过，同时排除笨重Ò二甲苯和米二甲苯。用于在75°C下分离等摩尔二元对-邻二甲苯混合物，高p对二甲苯的流量为467 g m ^-2 h ^-1，对二甲苯/邻二甲苯的选择性为38.5。MIL-160的稳定性可确保MIL-160膜的分离性能在24小时的测量过程中保持不变。高分离性能及其高热稳定性和化学稳定性使MIL-160膜成为分离二甲苯异构体的有希望的候选者。

更新日期：2018-10-19

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