石油化工2018，Vol.47Issue(4)：307-314,8.DOI:10.3969/j.issn.1000-8144.2018.04.001
预成型合成AlPO4-34分子筛
Pre-shaped synthesis of AlPO4-34 molecular sieve monoliths
摘要
Abstract
The pseudo-boehmite,phosphoric acid,hydrofluoric acid,1-methylimidazole and water were mixed to prepare a gel and subjected to extrusion molding. AlPO4-34 molecular sieve monolith was directly synthesized with pre-shaped gel extrudates in 1-ethyl-3-methyl imidazolium bromide([EMIm]Br). The influence of various synthesis parameters(HF/Al2O3molar ratio, crystallization time and temperature) on the synthesis of monolithic AlPO4-34 molecular sieve was investigated. XRD,SEM,particle mechanical strength test,N2adsorption/desorption,NMR and TG analyses were used to characterize the properties of the molecular sieve. Maintaining a proper HF amount,prolonging the crystallization time and improving the crystallization temperature were beneficial to get a cylinder bar formed fully with the AlPO4-34 molecular sieve monolith with high crystallinity and mechanical strength. The obtained monolith was composed of compactly packed and intergroup 2-5 μm AlPO4-34 molecular sieve crystals with abundant micro-,meso-,and macropores. The mechanical compressive strength could meet the requirement of fixed bed.关键词
预成型/分子筛/AlPO4-34/离子液体Key words
pre-shape/molecular sieve/AlPO4-34/ionic liquid分类
化学化工引用本文复制引用
王苹,王从新,吕广,马怀军,曲炜,田志坚..预成型合成AlPO4-34分子筛[J].石油化工,2018,47(4):307-314,8.基金项目
国家重点研发计划项目(2017YFB0306701) （2017YFB0306701）
国家自然科学基金资助项目(21406224). （21406224）
