FIELD: alkylation catalysts. SUBSTANCE: regeneration of catalyst used in the process of alkylation of alifatic hydrocarbons includes reagent treatment of liquid phase of catalyst oil formed as by-product during the alkylation process. Hydrogen is used as reagent. Treatment is carried out in presence of catalyst containing at least one VIII group metal (platinum, palladium, or their mixtures) deposited on acid-resistant carrier. The latter may be silicon dioxide, zeolite, or activated carbon. Temperature of treatment ranges from 20 to 200 C, and partial pressure of hydrogen from 1 to 150 bar. EFFECT: increased economical efficiency of process due to regeneration of exhausted part of catalyst. 3 cl, 4 tbl, 2 ex
