| 摘要 |
FIELD: petroleum processing, petroleum chemistry. ^ SUBSTANCE: method involves extractive rectification of gasoline fraction and the following extraction of distillate with mixed solvent N-methylpyrrolidone - sulfolane. At stage of extractive rectification mixed solvent N-methylpyrrolidone - sulfolane containing 60-80 wt.-% of N-methylpyrrolidone is used, and at stage of extraction the same mixed solvent N-methylpyrrolidone - sulfolane containing 80-95 wt.-% of sulfolane is used. Method provides simultaneous isolation of highly purified aromatic (C6-C8)-aromatic hydrocarbons from gasoline fractions with the extraction degree 99.8%. ^ EFFECT: improved method for isolating. ^ 2 tbl, 1 ex |
