Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, P. R. China.
Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA.
Science. 2022 Jul 15;377(6603):335-339. doi: 10.1126/science.abj7659. Epub 2022 Jul 14.
The separation and purification of xylene isomers is an industrially important but challenging process. Developing highly efficient adsorbents is crucial for the implementation of simulated moving bed technology for industrial separation of these isomers. Herein, we report a stacked one-dimensional coordination polymer {[Mn(dhbq)(HO)], Hdhbq = 2,5-dihydroxy-1,4-benzoquinone} that exhibits an ideal molecular recognition and sieving of xylene isomers. Its distinct temperature-adsorbate-dependent adsorption behavior enables full separation of -, -, and -xylene isomers in both vapor and liquid phases. The delicate stimuli-responsive swelling of the structure imparts this porous material with exceptionally high flexibility and stability, well-balanced adsorption capacity, high selectivity, and fast kinetics at conditions mimicking industrial settings. This study may offer an alternative approach for energy-efficient and adsorption-based industrial xylene separation and purification processes.
二甲苯异构体的分离和纯化是一个具有工业重要性但极具挑战性的过程。开发高效的吸附剂对于实施模拟移动床技术以实现这些异构体的工业分离至关重要。在此，我们报告了一种堆叠的一维配位聚合物 {[Mn(dhbq)(HO)]，Hdhbq = 2,5-二羟基-1,4-苯醌}，它表现出对二甲苯异构体的理想分子识别和筛分。其独特的温度-吸附物依赖的吸附行为使得 - 、 - 和 - 二甲苯异构体在气相和液相中都能完全分离。结构的精细刺激响应溶胀赋予这种多孔材料极高的灵活性和稳定性、平衡的吸附能力、高选择性和在模拟工业条件下的快速动力学。这项研究可能为节能和基于吸附的工业二甲苯分离和纯化过程提供了一种替代方法。
