FIELD: petroleum processing. SUBSTANCE: residual oil stuff with sapropelite and liquid product containing tetraline, its alkyl derivatives, and their mixes with other hydrocarbons in amount 1-10% based on residual oil stuff weight are subjected to thermal cracking at elevated temperature and pressure. Distillates useful as raw material for production of motor and jet fuels are isolated. A part of diesel fraction may be recycled into initial stuff in amount 10-20 wt % of the latter. EFFECT: enlarged fuel resource. 2 cl
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