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Abstract. This study aimed to synthesize zeolite NaX and HX using silica sand as a raw material. Silica purification was carried out using leaching method as a function of immersion time followed by the sol gel method. Purified silica was characterized using X-RF, X-RD and SEM. Synthesis of zeolite-X was carried out using the hydrothermal method by reacting NaOH, Al(OH)3, SiO2 with a mole composition ratio of 58: 58: 134. Synthesized zeolites were characterized using XRD, FT-IR, XRF, SEM, and BET. The results showed that the optimal immersion time is 12 hours where the highest silica yield obtained is 95.1 wt% and after treated with sol gel method is obtained yield of 98 wt% silica. The synthesized zeolite Na-X and H-X had SiO2/Al2O3 molar ratios of 2.94 and 3.14. The existence of the peak of FTIR spectrum at wave numbers of 484, 538, 818, and 999 cm-1 indicates the presence of a specific zeolite functional group which shows the zeolite X framework is formed. The SEM test shows that octahedral crystals are formed which confirmed the zeolite X. The sinthesized zeolite of Na-X and H-X have surface areas respectively of 14.229 m2/g and H-X of 25.147 m2/g.