Synthesis of NaP Zeolite Based on Bauxite Red Mud Using Hydrothermal Method on Mole Ratio of SiO2/Al2O3 Variations

Red mud is a bauxite industrial waste of reddish-brown with high alkalinity. has relatively silica and alumina content, so it can be utilized as raw material in the synthesis zeolite. This study aims to synthesize high-purity NaP zeolite from red at various SiO2/Al2O3 mole ratios. The begins neutralizing mud, followed by decomposition using alkaline fusion method ratio mud:NaOH = 1:1 (w/w). filtrate produced was adjusted 2.0; 2.5; 3.0; 4.0, respectively, adding sodium silicate, hydrothermal process an autoclave 120oC for 16 hours. synthesized zeolites were characterized XRD FTIR spectrophotometry. results showed that all variations studied type no other crystalline phases found impurities. structure formed tetragonal degree crystallinity 74.54%; 76.47%; 78.94%; 75.64%, crystal size 80.2286; 54.3437; 37.7099 40.1226 nm respectively. Based on study, pure moles 2.0 – 4.0.