【摘要】 以离子液体1-乙基-3-甲基-咪唑溴盐为溶剂和模板剂,选用不同的铝源,在常压下合成AlPO4-11分子筛.考察了在不同铝源条件下,物料配比、晶化时间和晶化温度对合成AlPO4-11分子筛的影响.产物通过X射线衍射仪(XRD)、扫描电子显微镜(SEM)等表征手段进行了表征.结果表明铝源性质的不同导致了合成规律和合成机理的不同.以异丙醇铝为铝源合成分子筛时,所需最佳P/Al比为3/1,分子筛的晶化速率较慢;而以碱式乙酸铝为铝源合成分子筛时,物料的P/Al摩尔比相对较低(1.5/1),分子筛的合成具有更快的晶化速率.更多还原

【Abstract】 Aluminophosphate molecular sieve AlPO4-11 was synthesized in the room temperature ionic liquid 1-ethyl-3-methylimidazolium bromide as both the solvent and template with different Al sources at ambient pressure.The effects of composition of incipient gels,crystallization time and crystallization temperature on synthesis of AlPO4-11 molecular sieve with different Al sources were investigated.The structure of AlPO4-11 molecular sieve was characterized by X-ray diffraction and scanning electron microscopy.The results indicated that the different properties of raw materials lead to the different mechanisms and rules on the ionothermal synthesis.When Al[OCH(CH3)2]3 was used as the Al source,the optimal ratio of P/Al in the incipient gels was 3/1,the crystallization was slow.When Al2O(CH3COO)4.4H2O was used as the Al source,the ratio of P/Al in the incipient gels was low(P/Al=1.5/1)and the crystallization was rapid.更多还原