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›› 2008, Vol. 8 ›› Issue (1): 93-96.

• 过程与工艺 • 上一篇    下一篇

铝源前驱体对离子热法合成磷酸铝分子筛的影响

王少君,侯蕾,徐云鹏,田志坚,余加祐,林励吾   

  • 出版日期:2008-02-20 发布日期:2008-02-20

Effect of Al-containing Precursors on Ionothermal Synthesis of Aluminophosphate Molecular Sieve

WANG Shao-jun,HOU Lei,XU Yun-peng,TIAN Zhi-jian,YU Jia-you,LIN Li-Wu   

  1. Dalian Institute of Light Industry
  • Online:2008-02-20 Published:2008-02-20

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被引次数

10

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.

关键词: 离子液体, AlPO4-11, 离子热合成, 分子筛

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.

Key words: ionic liquid, AlPO4-11, ionothermal synthesis, molecular sieve