蒸气相法合成AlPO4—5和AlPO4—11分子筛

报道了使用ＨＦ－Ａｌ２Ｏ３－Ｐ２Ｏ５－Ｈ２Ｏ凝胶在有机胺－Ｈ２Ｏ蒸气相中合成ＡｌＰＯ４－５和ＡｌＰＯ４－１１分子筛。研究了酸的种类、有机胺类型、Ｆ＾－／Ａｌ２Ｏ３和胺／Ｈ２Ｏ对ＡｌＰＯ４－５和ＡｌＰＯ４－１１分子筛纯相合成的影响。实验证明，Ｆ＾－对Ａｌ的络合作用是它们形成的关键因素之一，只有适量加入ＨＦ，才能用蒸气相法合成ＡｌＰＯ４－ｎ分子筛纯相；用蒸气相法在Ｅｔ３Ｎ－Ｈ２Ｏ蒸气体系中可合成ＡｌＰ

STUDIES ON PREPARING MOLECULAR SIEVES AlPO 4 5 AND AlPO 4 11 BY THE VAPOUR PHASE METHOD

It was reported that gel HF Al 2O 3 P 2O 5 H 2O transformed into molecular sieves AlPO 4 5 and AlPO 4 11 in vapour phase of amines H 2O mixtures In this paper, the influences of different types of acids and amines, the F -/Al 2O 3 ratios and the H 2O/amine ratios for preparing pure phase molecular sieves AlPO 4 5 and AlPO 4 11 have been studied The experiments have demonstrated that coordination of F - anion to Al is one of the key factors for preparing molecular sieves AlPO 4 5 and AlPO 4 11 By means of the vapour phase method, molecular sieves AlPO 4 5 and AlPO 4 11 can be prepared either in the vapour system of Et 3N H 2O or in the vapour system of n Pr 2NH H 2O, only if the HF in the system is in a suitable amount Synthesized samples were characterized by XRD, SEM and FT IR The data show that the synthesized samples have typical physical chemical properties of molecular sieve AlPO 4 n