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    • 9. 发明授权
    • VERFAHREN ZUR GEWINNUNG VON ROH-1,3-BUTADIEN
    • 一种获得ROH-1,3-丁二烯
    • EP1718585B1
    • 2012-05-30
    • EP05701352.6
    • 2005-02-04
    • BASF SE
    • HEIDA, Bernd
    • C07C7/08C07C11/167
    • C07C7/08Y10S203/08Y10S585/911C07C11/167
    • The invention relates to a method for obtaining raw-1,3-butadiene by extractive distillation with a selective solvent from a C4-fraction, containing C4-acetylenes as secondary components, in a partition column (TK) with a bottom evaporator (V1) inside of which a partition (T) is arranged in longitudinal direction of the column while forming a first partial area (A), a second partial area (B) and a lower shared column area (C), and to which an extractive wash column (K) is connected upstream therefrom. The invention is characterized in that the supply of energy into the partition column (TK) via the bottom evaporator (V1) is controlled in such a manner that a bottom flow (17) is drawn out from the partition column (TK), this bottom flow containing solvent loaded with C4-acetylenes whose proportion of 1,3-butadiene is limited in order to render the loss of 1,3-butadiene economically acceptable. The invention is also characterized in that the bottom flow (17) is fed to an acetylene degassing device (AG) and, inside this acetylene degassing device (AG), the C4-acetylenes are stripped out via the top and purified solvent is obtained in the form of a bottom flow (27).