FIELD: petroleum processing. SUBSTANCE: bitumen is produced from waste originating from sulfuric acid or oleum refinement of oils. Method consists in oxidizing acid refinery sludge (acid number 30-70 mg KOH/g) with air oxygen in presence of 0.9 to 10.0% of iron-containing catalyst in the form of finely dispersed powder obtained from water treatment process and recovered in air-cleaning apparatuses of smelting installations. Process is continued for no more than 1.4 h at temperature not superior to 150 C. EFFECT: enabled production of high-acidity bitumen and reduced power consumption. 2 tbl, 11 ex
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