METHOD OF SYNTHETIC FAUJASITE PRODUCING Russian patent published in 1998 - IPC

FIELD: building materials. SUBSTANCE: natural clay material containing silicon dioxide and aluminium oxide at ratio SiO₂ : Al₂O₃ = 2:1 is mixed with silicon dioxide at amount providing ratio SiO₂ : Al₂O₃ = 3.5:1. Then water is added to its content in mixture 40-45 wt.-%. After granulation the obtained granules are dried, subjected for thermic treatment and ground to particle size 100 mcm, not above. The obtained powder is mixed with sodium aluminate and silicate solutions at their concentration 40-45 wt.-% followed by forming, drying and hydrothermal crystallization. The obtained zeolite can be used as a catalyst in chemical and petrochemical industry, as an adsorbent for treatment of aqueous and gaseous flows from heavy metals and organic components. EFFECT: increased sorption capacity, mechanical strength as compared with zeolites produced by the known methods. 1 tbl, 2 ex