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Application

2003134648/04, 2003-11-27

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Start date

2003-11-27

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Actual filing date

2003-11-27

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Published

2005-06-20

(72)

Inventor

Zalishchevskij G.D.Gajle A.A.Varshavskij O.M.Semenov L.V.Kostenko A.V.Fedjanin N.P.Koldobskaja L.L.Kajfadzhjan E.A.

(73)

Holder

Obshchestvo S Ogranichennoj Otvetstvennost'Ju Ob"Edinenie

COMBINED METHOD FOR ISOLATING C6-C8-AROMATIC HYDROCARBONS FROM MIXTURES WITH NON-AROMATIC HYDROCARBONS Russian patent published in 2005 - IPC

Abstract RU 2254317 C1

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.

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RU 2 254 317 C1

Authors

Zalishchevskij G.D.

Gajle A.A.

Varshavskij O.M.

Semenov L.V.

Kostenko A.V.

Fedjanin N.P.

Koldobskaja L.L.

Kajfadzhjan E.A.

Dates

2005-06-20—Published

2003-11-27—Filed