NaA zeolite was prepared using alkaline fusion followed by hydro-thermal treatment method. 2 g of halloysite powder was placed in a Ni crucible and fused with 2.6 g NaOH powder at 673K for 2 h to promote their reactivity. The fused mass obtained was cooled and mixed with deionized water (38 mL) by magnetic stirring for 30 min until the reaction gel was homogenized. The aluminosilicate gelwasaged for 2 hat 313Kinthe sealed Teflon reactor to rearrange the reactant for forming nuclei. After that, the mixture
was crystallized at 363K for 5 h under static condition. Solid powder was filtered-off, washed, dried at 383K for 12 h and the product was obtained.