对微孔AlPO4-5分子筛水热合成中部分影响因素的研究

摘要

Aluminophosphate molecular sieves AlPO4-5 is a representative of phosphate molecular sieve,its excellent catalytic performance has been widely accepted. The compositions of the gel directly affect the composition and properties of the product. In this paper,the AlPO4-5 molecular sieve was synthesized by the hydrothermal method. With orthophosphoric acid(H3PO4)as P source,pseudo-boehmite as Al source and triethylamine(TEA)as template,it was obtained by crystallization 36 h under 180℃. Powder X-ray diffraction(XRD)patterns and electronic microscopy techniques were employed to characterize the AFI phase structure and morphology characterization of AlPO 4-5 respectively,we have investigated the effect of different amounts of water,templates and changing both at the same time to the synthesis AlPO4-5 respectively.%微孔磷酸铝分子筛AlPO4-5是一种具有代表性的磷酸盐分子筛，其优良的催化性能已得到广泛的肯定。其凝胶的组成直接影响到产品的组成和性质。以三乙胺为模板剂，拟薄水铝石、分析纯磷酸为原料，180℃下晶化36 h水热合成AlPO4-5分子筛。并以X-射线粉末衍射（XRD）对其进行结构鉴定、电子显微技术对其进行形貌表征。分别考察了水量改变、模板剂量改变及水量和模板剂量同时改变对AlPO4-5分子筛合成的影响。