FIELD: catalysts for petrochemical processes. SUBSTANCE: process of preliminary sulfidizing of porous particles of sulfidizible catalyst containing at least one metal or metal oxide consists in (i) impregnation of catalyst with inorganic polysulfide solution and with at least one water-soluble oxygenated hydrocarbon to give sulfur-containing catalyst, in which at least part of sulfide or sulfur is introduced into pores of catalyst, and (ii) heating of sulfur-containing catalyst in presence of non-oxidative medium. EFFECT: increased catalytic activity. 13 cl, 1 tbl, 8 ex
