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    VERFAHREN ZUR OXIDATIVEN DEHYDRIERUNG VON N-BUTENEN ZU BUTADIEN
    1.
    发明公开
    VERFAHREN ZUR OXIDATIVEN DEHYDRIERUNG VON N-BUTENEN ZU BUTADIEN 有权

    公开(公告)号：EP2945923A1

    公开(公告)日：2015-11-25

    申请号：EP14700646.4

    申请日：2014-01-15

    申请人： BASF SE

    发明人： JOSCH, Jan Pablo ,  WECK, Alexander ,  GIESA, Sonja ,  BÜTEHORN, Steffen ,  BALEGEDDE RAMACHANDRAN, Ragavendra Prasad ,  BENFER, Regina ,  WEBER, Markus

    IPC分类号： C07C5/48 ,  C07C7/00 ,  C07C7/08 ,  C07C7/11 ,  C07C7/05 ,  C07C11/167

    CPC分类号： C07C5/48 ,  C07C7/005 ,  C07C7/05 ,  C07C7/08 ,  C07C7/11 ,  C07C2523/887 ,  C07C11/167

    摘要： The invention relates to a method for producing butadine from n-butenens, consisting of the following steps: A) a feed gas flow (a) containing n-butenes is provided; B) the feed gas flow (a) containing n-butenes and an oxygen-containing gas is fed to at least one dehydrogenation area and is oxidatively dehydrogenated from n-butenes to form butadiene; a product gas flow (b) containing butadiene, unreacted n-butenes, water vapour, oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases is obtained; C) the product gas flow (b) is cooled and compressed in at least compression step; at least one condensate flow (c1) containing water and a gas flow (c2) containing butadiene, n-butenes, water vapour, oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases is obtained; D) non-condensable and low-boiling gas component parts containing oxygen, low-boiling hydrocarbons, optionally carbon oxides and optionally inert gases are separated from the gas flow (c2) by Da) absorbing C4-hydrocarbons containing butadiene and n-butenes in absorption means boiling at a high temperature, wherein an absorption agent flow charged with C4-hydrocarbons and the gas flow (d2) are obtained, Db) the oxygen is removed from the absorption agent flow charged with the C4-hydrocarbon by stripping with the inert gas, and Dc) the C
    4 hydrocarbons are desorbed from the charged absorption agent flow and a C
    4 -product gas flow (d1), which consists essentially of C
    4 -hydrocarbons and has less that 100ppm oxygen, is obtained. E) the C4-product flow (d1) is separated by extractive distillation using a selected solvent for butadiene in a butadiene and the material flow (e1) containing the selective solvent and a material flow (e2) containing n-butenes; F) the butadiene and the material flow (e1) containing the selective solvent is distilled in a material flow (f1) consisting essentially of the selective solvent and a material flow (f2) containing a butadiene.

    摘要翻译： 本发明涉及由正丁烯制备丁二烯的方法，其由以下步骤组成：A）提供含有正丁烯的原料气流（a）; B）将含有正丁烯和含氧气体的进料气流（a）供入至少一个脱氢区并从正丁烯氧化脱氢形成丁二烯; 得到包含丁二烯，未反应的正丁烯，水蒸气，氧气，低沸点烃，任选的碳氧化物和任选的惰性气体的产物气流（b）; C）产品气流（b）至少在压缩步骤中被冷却和压缩; 获得至少一种含水和含丁二烯，正丁烯，水蒸气，氧气，低沸点烃，任选的碳氧化物和任选的惰性气体的气流（c2）的冷凝物流（c1） D）将含有氧，低沸点烃，任选碳氧化物和任选惰性气体的不可冷凝和低沸点气体组分部分从气流（c2）中分离出来，Da）将含有丁二烯和正丁烯的C4-烃 在高温下沸腾的吸收装置，其中获得装有C4-烃的吸收剂流和气流（d2），Db）通过用惰性溶剂汽提从装有C4-烃的吸收剂流中除去氧气 气体和Dc），C 4烃从加入的吸收剂流中解吸并获得基本上由C 4烃组成且具有小于100ppm氧的C 4产物气流（d 1）。 E）使用用于丁二烯中丁二烯的选定溶剂的萃取蒸馏和含有选择性溶剂和含有正丁烯的物料流（e2）的物料流（e1）通过萃取蒸馏分离C4-产物流（d1） F）将丁二烯和含有选择性溶剂的物流（e1）在基本上由选择性溶剂组成的物流（f1）和含丁二烯的物流（f2）中蒸馏。