FIELD: petroleum processing. SUBSTANCE: process is carried out by mixing raw material with additive prepared by treating petroleum products with ozone- containing gas, after which mixture is heated and fractioned. Petroleum products for preparing additive contain at least 0.65% sulfur-containing compounds (on conversion to sulfur) and at least 3.5% polyarene compounds. Additive is used in amount 0.5 to 13 g per 1 kg of raw material. Petroleum products are treated with ozone- containing gas preferably at 20-60 C until products are saturated with ozone. Raw material to be processed can also be utilized for preparing additive. EFFECT: increased yield of light petroleum products. 5 cl
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