采用原位水热合成法在具有较高装填面积的α-Al2O3中空纤维支撑体上制备MFI分子筛膜.实验研究了膜合成时间及重复次数对膜质量的影响.结果表明,经过两次5h合成的中空纤维MFI分子筛膜具有良好的膜结构和较优的对二甲苯(PX)渗透选择性.同时,系统考察了操作温度和进料分压对膜性能的影响.结果显示,对于PX/OX(邻二甲苯)/MX(间二甲苯)(2∶1∶1)三元体系的分离,150℃时,PX/OX和PX/MX的分离因子分别可达174、79,PX的渗透性为3.7×10-9 mol/(m2·s·Pa). The in-situ hydrothermal synthesis was used to prepare MFI zeolite membrane on a-Al2O3 hollow fiber support with high packing area.The influence of membrane synthesis time and repetition times on membrane quality was studied.The results showed that after two 5h synthesis Of the hollow fiber MFI zeolite membrane has good membrane structure and better p-xylene (PX) permeation selectivity.Meanwhile, the system investigated the influence of operating temperature and feed partial pressure on membrane performance.The results showed that for the PX / OX (O-xylene) / MX (m-xylene) (2: 1: 1) ternary system. The separation factors of PX / OX and PX / MX are respectively 174 and 79 at 150 ℃. Is 3.7 × 10 -9 mol / (m 2 · s · Pa).