METHOD OF PREPARING BALL ZEOLITE-CONTAINING CATALYST Russian patent published in 1997 - IPC

FIELD: catalysts in chemistry and petrochemistry. SUBSTANCE: increase in strength of spherical granules of zeolite-containing catalysts as well as achieving high yield of fraction with narrow grain-size distribution within wide range of grain size is accomplished by using aluminum hydroxide as binder in amount 20 to 40 wt %, producing desired-size granules by extrusion with simultaneous cutting, slight curing to moisture content no higher than 90% initial moisture content of molding mass, and rounding granules on dish round-maker and simultaneously powdering them. Molding mass is supplemented by return materials in amount 1-15% based on solid molding mass. As return materials, ground reject after rounding and screening granules is used. EFFECT: increased yield and strength of catalyst. 3 cl, 1 tbl