FIELD: environmental safety. SUBSTANCE: method includes extraction with extract containing aromatic hydrocarbons in two countercurrent steps under atmosphere pressure and extract to raw material ratio from 1:1 to 2:1. Into extractor, water is introduced in settling stage in amount providing 55-60% water content in residue. Before the second step of extraction, extractor is filled with settled (fried from water and suspended particles) extract. EFFECT: increased efficacy of purification process. 1 tbl
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