高温离子热合成MAPO分子筛

Ionothermal Synthesis of MAPO Molecular Sieves at High Temperature

在280℃条件下,以磷酸为磷源、异丙醇铝为铝源、乙酸镁为镁源、正二丙胺为结构导向剂,在溴化1-丁基-3-甲基咪唑鎓([BMIM]Br)离子液体中合成了系列MAPO分子筛。随着晶化时间的延长,出现了一个从MAPO-5到MAPO-11、进而到MAPO-25分子筛的转晶过程。这一符合Ostwald定律的转晶过程伴随着骨架密度的增加以及样品形貌和模板剂状态的变化。

A series of MAPO molecular sieves has been synthesized ionothermally in [ BMIM] Br ionic liquid at 280℃ using H_3PO_4, Al[OCH （ CH_3 ）_2 ]_3, n-dipropylamine, magnesium acetate and HF as raw materilas. The structure transformation process （ MAPO-5 to MAPO-11, finally MAPO-25 ） obeys the Ostwald＇ s rule of successive crystallization, along with the increase in framework density and the change in morphology and state of the templates.