Various conditions were investigated in detail for the novel organic template-free static hydrothermal synthesis of SUZ-4 zeolite in the presence of seeds.The obtained samples were characterized by XRD(X-ray diffraction),SEM(scanning electron microscope),TG(thermal gravimetric analysis),ICP(inductively coupling plasma)elemental analysis,nitrogen sorption isotherm and surface area.The results show that pure SUZ-4 zeolites with high crystallinity are obtained in a broad window of synthesis conditions:seed mass concentration 0.2%-2%,SiO2/Al2O3molar ratio 21-25,KOH/SiO2molar ratio 0.33-0.43,H2O/SiO2molar ratio 7.14-38.1,aging time 24 h,crystallization temperature 160°C,and crystallization time 6-10 d.Also,crystallinity and size of the rod-like SUZ-4 zeolite crystals are found to alter with the conditions.
