Microsphere cracking catalyst "octifine" and method for preparation thereof

FIELD: chemistry. SUBSTANCE: invention relates to the oil-refining and petrochemical industry and specifically to preparation of catalysts for heavy catalytic cracking of oil fractions for producing C 2 -C 4 olefins and high-octane gasoline. The invention particularly relates to a microsphere cracking catalyst obtained from a suspension which contains, based on dry residue, 25-35 wt % fine zeolite ReHY, 30-40 wt % kaolin, 25-44 wt % aluminium oxide sources and 1-10 wt % fine silicon dioxide. The invention also relates to a method of producing a microsphere cracking catalyst, which includes steps of preparing a suspension of fine zeolite ReHY, kaolin, aluminium oxide sources and fine silicon dioxide with concentration of the suspension, based on dry residue, of 450-600 g/l, moulding by spraying the suspension in a medium of flue gases at temperature of 140-170°C and calcining the obtained microspheres at temperature of 550-650°C in a revolving calcining furnace. EFFECT: obtaining a microsphere cracking catalyst with high wear-resistance and catalytic activity. 4 cl, 1 tbl, 5 ex