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    VERFAHREN ZUR HERSTELLUNG VON BUTADIEN DURCH OXIDATIVE DEHYDRIERUNG VON N-BUTENEN
    10.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON BUTADIEN DURCH OXIDATIVE DEHYDRIERUNG VON N-BUTENEN 审中-公开

    公开(公告)号：EP3383831A1

    公开(公告)日：2018-10-10

    申请号：EP16805129.0

    申请日：2016-12-02

    申请人： BASF SE ,  Linde AG

    发明人： JOSCH, Jan Pablo ,  BALEGEDDE RAMACHANDRAN, Ragavendra Prasad ,  GRUENE, Philipp ,  RISSEL, Steffen ,  GEMBALA, Martin ,  WENNING, Ulrike ,  WELLENHOFER, Anton ,  REYNEKE, Hendrik ,  TOEGEL, Christine

    IPC分类号： C07C5/48

    CPC分类号： C07C5/48 ,  B01D3/40 ,  B01J19/0053 ,  B01J2219/00121 ,  B01J2219/00425 ,  C07C7/005 ,  C07C7/08 ,  C07C7/09 ,  C07C7/11 ,  C07C11/167

    摘要： The method according to the invention has the steps of A) providing a feed gas flow a which contains n-butene; B) feeding the n-butene-containing feed gas flow a and an oxygen-containing gas into a dehydrogenation reactor and oxidatively dehydrogenating n-butene into butadiene; C) cooling and compressing the product gas flow b in at least one cooling stage comprising a quench column and in a compression stage comprising a compressor, wherein the product gas flow b is brought into contact with at least one coolant being circulated; D) separating non-condensable and low-boiling gas components as gas flow d2 out of the gas flow c2 by absorbing the C
    4 hydrocarbons in at least one absorption agent being circulated; E) separating the C
    4 product flow d1 into a material flow e1, which contains butadiene and a selective solvent, and a material flow e2, which contains n-butene, by means of an extractive distillation using the solvent which is selective for butadiene; F) distilling the material flow e1, which contains butadiene and the selective solvent, into a material flow f1, which substantially consists of the selective solvent, and a butadiene-containing material flow f2. The invention is characterized in that the following measures (i) to (iii) are taken: (i) preventing the formation of explosive gas mixtures by monitoring the oxygen concentration in the oxygen-containing gas flows fed into the dehydrogenation zone and controlling the mass flows of oxygen-containing gas flows and hydrocarbon-containing gas flows such that no explosive gas mixtures can be formed; (ii) interrupting the supply of the oxygen-containing gas mixture into the dehydrogenation zone if a threshold for the oxygen concentration in the dehydrogenation gas mixture is exceeded; and (iii) carrying out steps A) to F) in equipment which is designed to be explosion-resistant, wherein liquid-conducting pipelines are designed to be explosion-resistant, and gas lines are designed to be detonation-resistant.