The FeAPO-44 molecular sieve with CHA-type structure has been synthesized under solvent-free conditions. This is the first case that this material was successfully prepared by this novel solvent-free method. Its optimal synthesis conditions were refined. The results show that proper P₂O₅/Al₂O₃ ratio, a lower SDA/Al₂O₃ ratio (SDA: cyclohexylamine) and relatively mild crystallization temperature are more beneficial to the synthesis of pure CHA phase. The structural and compositional characteristics of the relatively pure FeAPO-44 zeolite were studied in depth by XRD, TG-DSC, CHN element analysis, EDS, SEM and N₂ physisorption. According to the CHN element analysis, EDS and TG-DSC measurements, the approximate chemical formula of the synthesized sample SDA/Al-1.4 was determined. The catalytic performances of selected samples were investigated in the methanol-to-olefins reaction. The present results imply that many other zeolite topologies may be conveniently prepared by this solvent-free route.

在无溶剂条件下合成了具有CHA型结构的FeAPO-44分子筛。这是该材料通过这种新型无溶剂方法成功制备的第一个案例。对其最佳合成条件进行了细化。结果表明，适当的P ₂ O ₅ /Al ₂ O ₃比、较低的SDA/Al ₂ O ₃比（SDA：环己胺）和相对温和的结晶温度更有利于合成纯CHA相。通过XRD、TG-DSC、CHN元素分析、EDS、SEM和N _{2 等手段}深入研究了相对纯的FeAPO-44沸石的结构和成分特征。物理吸附。根据CHN元素分析、EDS和TG-DSC测量，确定了合成样品SDA/Al-1.4的近似化学式。研究了所选样品在甲醇制烯烃反应中的催化性能。目前的结果意味着可以通过这种无溶剂途径方便地制备许多其他沸石拓扑结构。