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    • 7. 发明公开
    • VERFAHREN ZUR BEREITSTELLUNG EINES DAMPFFÖRMIGEN GEREINIGTEN ROH-C4-SCHNITTES ALS EINSATZSTROM FÜR EINE EXTRAKTIVDESTILLATION MIT EINEM SELEKTIVEN LÖSUNGSMITTEL
    • 用于提供蒸汽的方法清洁使用的选择性溶剂SHAPED ROH-C4-CUT AS用电FOR萃取蒸馏
    • EP2802637A1
    • 2014-11-19
    • EP13700159.0
    • 2013-01-10
    • BASF SE
    • HEIDA, BerndHUGO, Randolf
    • C10G21/28C10G21/14C10L3/12B01D3/14
    • C10G21/28C10G21/12C10L3/12
    • The invention relates to a method for providing a purified crude gaseous C
      4 fraction (2) as an input stream for an extractive distillation using a selective solvent in order to obtain crude 1,3-butadiene on the basis of a liquid crude C
      4 -fraction (1) as a feed stream, containing C
      3 hydrocarbons, C
      4 oligomers, C
      4 polymers, and C
      5+ hydrocarbons together with butanes, butenes, and 1,3-butadiene. The method has the steps of 1) separating the C
      4 oligomers, C
      4 polymers, and C
      5+ hydrocarbons up to the respective residual content previously specified for the purified crude gaseous C
      4 fraction and 2) evaporating the liquid crude C
      4 fraction in an evaporator tank (VK). The invention is characterized in that the evaporator tank (VK) is associated with a stripping column (K) with one or more separating stages, the liquid C
      4 fraction (1) being fed to the stripping column in the upper region of the stripping column. The stripping column directly exchanges gas and liquid with the evaporator tank (VK) in the lower region of the stripping column, and the purified crude gaseous C
      4 fraction (2) is drawn off from the stripping column in the upper region. The stripping column (K) is operated without a condenser at the column head.
    • 本发明涉及一种用于使用的选择性溶剂,以获得液体粗C4馏分的基础上粗的1,3-丁二烯在萃取蒸馏提供纯化粗气态C4馏分(2),作为对输入流( 1)作为进料流,与丁烷,丁烯,和1,3-丁二烯含C3烃,C4低聚物,聚合物C4,和C5 +烃在一起。 该方法具有1分离C4低聚物,C4聚合物,和C5 +烃最多可为纯化的粗气态C4馏分先前指定的respectivement残余含量和2)在蒸发器罐蒸发液体粗C 4馏分中的步骤)(VK) , 在做了蒸发器罐(VK)与汽提塔(K)具有一个或多个分离阶段,液体C4馏分(1)被馈送到汽提塔中的汽提塔的上部区域相关联的本发明的特征。 汽提塔直接交换气体和液体在汽提塔的下部区域中的蒸发器箱(VK),并且将纯化的粗气态C4馏分(2)由在上部区域中的汽提塔排出。 汽提塔(K)没有在塔头冷凝器被操作。