METHOD FOR SEPARATION OF C-HYDROCARBON FRACTIONS Russian patent published in 2003 - IPC

Abstract RU 2213721 C1

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to methods for separation of mixture of C₄-hydrocarbons by extractive rectification in the presence of acetonitrile-base extractant. C₄-Hydrocarbon fractions are separated by rectification in the presence of extractant containing acetonitrile, 2-10 wt.-% of water and 1.9-30.0 wt.-% of C₁-C₄-aliphatic alcohols. Primary or tertiary alcohols or their mixtures are used as aliphatic alcohols. Invention provides high selectivity of separation and reduced loss of alcohols in their recuperation. Invention can be used in industry of synthetic rubber, in part, in separation of cracking butane-butylene fractions. EFFECT: improved separating method. 2 cl, 7 ex

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RU 2 213 721 C1

Authors

Borejko N.P.

Jafizova V.P.

Repin V.V.

Romanov V.G.

Gavrilov G.S.

Dates

2003-10-10—Published

2002-04-11—Filed