FIELD: petrochemical processes. SUBSTANCE: heavy oil residue, in particular mazut or goudron, are processed in presence of active molybdenum-containing complex obtained in the process of atmospheric or vacuum petroleum distillation. Water- or oil-soluble molybdenum salt in solvent is dispersed in petroleum feedstock before distillation. Dispersing is carried out until stable emulsion with drop diameter 9,5 to 5.0 mcm is obtained. Distillation residue containing 0.001 to 1.000 wt % molybdenum is introduced into hydrogenation reactor. EFFECT: increased yield of light petroleum products. 2 tbl, 5 ex
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