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)
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%
SiO
2
/Al
2
O
3
molar ratio 21-25
KOH/SiO
2
molar ratio 0.33-0.43
H
2
O/SiO
2
molar ratio 7.14-38.1
aging time 24 h
crystallization temperature 160℃
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.
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