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.