METHOD OF PREPARING GRANULAR FAUJASITE TYPE ZEOLITE WITHOUT BINDING MATERIALS Russian patent published in 2001 - IPC

FIELD: processing of natural clay materials more particularly preparation of granular synthetic zeolites as adsorbents and catalysts. SUBSTANCE: natural clay material is thermally activated, mixed with alumosilicon hydrogel and amorphous silica is added to reaction mixture, mixture is granulated, dried and hydrothermal crystallization is carried out in alkaline solution which is sodium hydroxide having concentration of 40-60 g/l in admixture with lithium hydroxide and in the presence of silicate- or aluminate- ion depending on SSS molar ratio. Crystallization is carried out at clay material to lithium hydroxide molar ratio of 100:0.1-0.5 at 85-100 C for 20-36 h. Invention makes it possible to shorten crystallization time. EFFECT: more efficient preparation method. 2 ex, 3 tbl