Hydrothermal synthesis of nanocrystalline NaX zeolite at room temperature.

NaX zeolites were prepared by hydrothermal synthesis under room-temperature conditions. Some influence parameters such as crystallization time, Al2O3/SiO2, Na2O/SiO2 and H2O/SiO2 molar ratios on the crystalline end products were studied, the products were characterized by XRD, SEM, TEM, particle size analysis and N2 adsorption-desorption techniques. The results indicated that although 28 days product was fully crystalline according to the XRD investigation, the crystals were able to continue to grow.