FIELD: petroleum processing and petrochemistry. SUBSTANCE: hydrocarbon feedstock containing paraffin molecules and 500 ppm sulfur or sulfur-containing compounds is brought, under catalytic deparaffination conditions, into contact with catalytic system containing at least one hydrogenating component, dealuminated aluminosilicate zeolite crystals, and binding material: essentially aluminum-free refractory low-acidity oxide. EFFECT: prolonged catalytic activity. 12 cl, 7 tbl, 5 ex
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