FIELD: petrochemical processes.
SUBSTANCE: proposed catalyst based on high-silica zeolites of the type H-ZSM-5 described by empiric formula: (0.1-0.01)Na2O*Al2O3*(20-250)SiO2 (60-80%) and modified by at least one subgroup IA metal oxide (0.1-10%) further contains at least one element oxide from following group of elements: zinc, cerium, rhenium, lanthanum, copper, indium, gallium, and molybdenum (0.1-10%), boron oxide and/or phosphorus oxide as strengthening additive (0.5-5.0%), and alumina (the balance), all percentages being given on conversion to oxides.
EFFECT: increased stability of catalyst under heavy-duty conditions.
5 cl, 1 tbl, 16 ex
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