METHOD OF PREPARING ZEOLITE Russian patent published in 2001 - IPC

FIELD: preparation of ZSM-5-type zeolite, more particularly processing of various hydrocarbon stock. SUBSTANCE: method comprises mixing silicon source, aluminum source, alkaline solution and seed, carrying out crystallization and ionic exchange; silicon source and/or aluminum source includes highly active, powder-like alumosilicon gel resulting from grinding silica gel and/or silica gel containing more than 0.5 wt % of aluminum and/or molded ZSM-5 type zeolite based catalyst. EFFECT: increased catalytic stability and more uniform distribution of aluminum atoms within depth of crystal. 4 cl, 4 ex, 1 tbl