FIELD: petrochemistry. SUBSTANCE: method involves contacting raw petroleum with organic solvent, the process is carried out at temperature being not lower than mutual solubility of petroleum or its fractions and solvent. Dialkyl (C1-C3) carbonate is used as mentioned above organic solvent. Precipitate enriched by asphaltenes and asphaltene complexes of metals is separated of liquid phase. The latter is cooled additionally and/or liquid solvent being more polar than used carbonate is added. EFFECT: improves efficiency of the method. 12 cl, 6 tbl
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Authors
Dates
1994-06-15—Published
1991-06-03—Filed