MIL-125 is a metal-organic framework with great potential for the adsorption and separation of xylene isomers. However, MIL-125 is usually synthesized under anhydrous and anaerobic conditions. In this study, homogeneously shaped and highly crystalline MIL-125 was synthesized by introducing water-resistant titanium-containing oligomers into the synthesis process. With the assistance of the novel oligomers, MIL-125 can be synthesized in the presence of water, which meets batch-production requirements. The adsorption separation performance of the obtained highly crystalline MIL-125 was also significantly enhanced. The para-xylene/meta-xylene selectivity can reach 13.5 in mesitylene, which is higher than the selectivity values of most previously reported para-selective adsorbents. The MIL-125 xylene separation performance was verified using both batch adsorption and breakthrough experiments in the liquid phase. In addition, the influence of the solvent effect was evaluated through microcalorimetric experiments, liquid-phase adsorption experiments, and theoretical calculations.

MIL-125 是一种金属有机骨架，在二甲苯异构体的吸附和分离方面具有巨大潜力。然而，MIL-125 通常在无水和厌氧条件下合成。在这项研究中，通过在合成过程中引入防水的含钛低聚物，合成了形状均匀且高度结晶的 MIL-125。在新型低聚物的帮助下，MIL-125可以在水存在下合成，满足批量生产要求。所得高结晶MIL-125的吸附分离性能也显着增强。在对-二甲苯/间-二甲苯的选择性可以达到在均三甲苯，这是比大多数先前报道的选择性值更高13.5对- 选择性吸附剂。MIL-125 二甲苯分离性能通过液相中的批量吸附和穿透实验进行了验证。此外，还通过微量热实验、液相吸附实验和理论计算评估了溶剂效应的影响。