FIELD: petrochemical processes. SUBSTANCE: process comprises following preliminarily stages: supplying heavy hydrocarbon stock and providing catalytically-active phase including first metal and second metal, the first metal being nonprecious VII group metal and the second one alkali metal or their mixture at molar ratio of the first metal to the second more than 0.25. At least one of the metals is in the form of oil-soluble salt. Hydrocarbon stock is then brought into contact with water vapor at pressure up to 21.09 kg/sq. cm in presence of catalytic phase, which can be applied on a carrier or mixed with raw material. EFFECT: enabled production of fractions of lighter and more worthy products with no utilization of hydrogen. 23 cl, 5 tbl, 5 ex
