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采用铝交联剂交联蒙脱土,制备了不同Al/MMT配比的铝层柱蒙脱土,并采用XRD、吡啶吸附红外进行了表征,研究了铝层柱蒙脱土的水热稳定性及其表面酸性。研究表明,在500℃下焙烧8~12 h,有效改善了Al-MMT蒙脱土的水热稳定性,铝层柱蒙脱土酸类型和酸强度可以通过改变铝与蒙脱土的配比来实现。
The aluminum montmorillonite with different Al / MMT ratios was prepared by cross-linking montmorillonite with aluminum cross-linking agent and characterized by XRD and pyridine adsorption infrared spectroscopy. The hydrothermal stability of aluminum montmorillonite Sex and its surface acidity. The results show that calcination at 500 ℃ for 8-12 h can effectively improve the hydrothermal stability of Al-MMT montmorillonite. The type of montmorillonite and acid strength of Al layer can be controlled by changing the ratio of aluminum to montmorillonite to fulfill.