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介绍了硅,钛取代AlPO-11分子筛SAPO-11、TAPO-11的合成方法,采用X射线衍射(XRD)、扫描电子显微镜(SEM)、热重差热、氮气吸脱附等手段对合成的分子筛进行了表征,考察了晶化温度和原料比对分子筛合成的影响。结果表明,硅,钛取代AlPO-11分子筛能生成AEL结构的TAPO-11分子筛;SAPO-11与AlPO-11分子筛表观形貌相差不大,而TAPO-11分子筛表观形貌则与AlPO-11分子筛有很大不同;硅,钛取代后分子筛的孔道半径及其孔容有所改变;3种分子筛都具有较好的热稳定性。
The synthesis methods of SAPO-11 and TAPO-11 which substituted AlPO-11 molecular sieve by silicon and titanium were introduced. The synthesis of the synthesized AlPO-11 molecular sieve by X-ray diffraction (XRD), scanning electron microscopy (SEM) The molecular sieve was characterized and the effect of crystallization temperature and raw material ratio on the synthesis of molecular sieve was investigated. The results show that TAPO-11 molecular sieve with AEL structure can be formed by substituting silicon and titanium on AlPO-11 molecular sieve. The apparent morphology of SAPO-11 and AlPO-11 molecular sieve is similar, while the apparent morphology of TAPO- 11 zeolites are very different; the pore radius and pore volume of the molecular sieve after the substitution of silicon and titanium are changed; all three kinds of molecular sieves have good thermal stability.