【摘要】 <正> 一、前言Y 型沸石具有良好的骨架结构和热稳定性,60年代就已成为主要的石油裂化催化剂。迄今为止,Y 型沸石仍在石油裂化工业占有主导地位。Y 型沸石合成目前仍采用水热晶化法,即在 Na₂O-SiO₂-Al₂O₃-H₂O 体系,通过自生压力晶化得到。NaY 型沸石必须经过几次铵交换和焙烧后才能转变成氢型。近年来直接水热合成铵型沸石工作报道很多。除交沸石外都是用有机胺做为模板剂。已合成出的胺型沸石更多还原

【Abstract】 N-X and N-Y zeolites have been synthesised in the TMAOH-SiO₂-Al₂O₃-H₂Osystem by hydrothermal reaction with silica sols （Na₂O0.3wt%）as the source ofsilica.It is thought that Na⁺ cation is the template for faujusites.Synthesis offaujusites are carried out in NH₄OH-SiO₂-Al₂O₃-H₂O,NH₄OH-TMAOH-SiO₂-Al₂O₃-H₂O and TMAOH-SiO₂-Al₂O₃-H₂O systems with added crystal seeds.There is littlepossibility that fanjusites can be synthesised in systems free of Na⁺ cation.更多还原