FIELD: alkylation catalysts. SUBSTANCE: regeneration of hydrocarbon alkylation catalyst applied in fixed bed consists in distillation, mixing with sulfuric acid (proton donor), and separation of acid catalyst from mixture. According to invention, mixing is performed before distillation, and for mixing tarry alkylation residue is used. In the distillation, acid catalyst is distilled from mixture in presence of inert carrier at 30-70 C and pressure 0.1-0.3 mm Hg, acid catalyst is separated from inert carrier. EFFECT: increased economical efficiency of catalytic alkylation process. 5 cl
