Novel hierarchical MCM-68 zeolite materials were successfully prepared by two simple, effective and environmentally friendly methods: H₂O₂ microexplosion under microwave and NH₃(aq) treatment. The characterization of the materials with powder XRD, SEM, TEM, N₂-sorption, and NH₃-TPD proved that abundant mesopores across zeolite crystals were created while the microporous MSE framework was well preserved. The mesopore volume of hierarchical MCM-68 zeolites is up to 0.19 cm³ g⁻¹. The crystallinities of hierarchical ones and microporous MCM-68 are nearly the same according to the XRD result. The acidities of hierarchical MCM-68 are generally lower than their raw materials. Gas-phase isomerization reaction of m-xylene was carried out over these hierarchical MCM-68 zeolites as well as HMCM-68 zeolite under different conditions to characterize the catalytic property of newly prepared hierarchical zeolites. It was found that the m-xylene conversion and disproportionation/isomerization rate ratio were closely related to the created mesopores in hierarchical MCM-68 zeolites under high reaction temperature and low weight hourly space velocity (WHSV). Moreover, these hierarchical MCM-68 zeolites exhibited improved resistance to coke formation compared with HMCM-68.

通过两种简单，有效和环境友好的方法成功制备了新型的分层MCM-68沸石材料：微波下的H ₂ O ₂微爆炸和NH ₃（aq）处理。用粉末XRD，SEM，TEM，N ₂吸附和NH ₃ -TPD对材料进行表征，证明在沸石晶体上形成了丰富的中孔，同时很好地保留了微孔MSE骨架。MCM-68分子筛的介孔体积最大为0.19 cm ³  g ^-1。根据XRD结果，分层晶体和微孔MCM-68的结晶度几乎相同。分级MCM-68的酸度通常低于其原料。的气相异构化反应米二甲苯进行超过这些分层MCM-68的沸石，以及在不同条件下HMCM-68沸石以表征新制备分层沸石的催化性能。据发现，所述米二甲苯转化率和歧化/异构化率比有密切的关系在高反应温度和低的重时空速（WHSV）下分层MCM-68沸石所创建的中孔。而且，与HMCM-68相比，这些分级的MCM-68沸石显示出对焦炭形成的改进的抵抗性。