以天然矿物微斜长石为主要原料,13X沸石前驱体为晶核剂,结合介孔分子筛MCM-41与13X沸石合成工艺,合成了孔壁中含有13X沸石基本结构单元的铝硅酸盐介孔分子筛.主要对形成分子筛过程中表面活性剂(CTAB)用量(摩尔比(CTAB∶SiO2)分别为0.10、0.15、0.20和0.25)、母液搅拌时间(0.5h和1 h)和晶化时间(2天、4天、6天和8天)等因素对样品孔序度的影响进行了研究.样品表征采用XRD和傅立叶红外光谱等测试手段.结果表明,由天然矿物微斜长石合成介孔分子筛是可行的;合成的分子筛孔壁中含有13X沸石基本结构单元,即硅铝氧构成的双六元环结构单元.对样品孔序度的研究表明,摩尔比(CTAB ∶ SiO2)越大,样品孔序度越好;母液搅拌时间为1h比0.5h条件下合成的样品的孔序度好;晶化时间由2天逐渐增加到4天后,分子筛孔序度在各个方向上已变得非常好,继续延长晶化时间至6天和8天后,样品在各个方向上的孔序度总体仍然很好,但样品XRD曲线上主衍射峰(100)强度下降,说明随晶化时间延长,样品在(100)方向上孔的短程有序性下降.
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