FIELD: petroleum processing. SUBSTANCE: solid oil sludge is first converted into plastic state, after which heated in a single or in several steps from ambient temperature to 700 C at velocity 1.25-20.0 C/min, simultaneously isolating corresponding fractions. The latter as well as the rest of sludge are modified during any heating period to produce various products. EFFECT: achieved versatility of process and widened assortment of products. 7 cl, 1 dwg, 3 tbl, 5 ex
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