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    VERFAHREN DER HETEROGEN KATALYSIERTEN PARTIELLEN GASPHASENOXIDATION VON PROPEN ZU ACRYLSÄURE
    3.
    发明授权
    VERFAHREN DER HETEROGEN KATALYSIERTEN PARTIELLEN GASPHASENOXIDATION VON PROPEN ZU ACRYLSÄURE 有权

    公开(公告)号：EP1611077B1

    公开(公告)日：2008-03-19

    申请号：EP04722160.1

    申请日：2004-03-20

    申请人： BASF SE

    发明人： PETZOLDT, Jochen ,  DIETERLE, Martin ,  ARNOLD, Heiko ,  RUPPEL, Wilhelm ,  MÜLLER-ENGEL, Klaus-Joachim

    IPC分类号： C07C57/05

    CPC分类号： C07C51/252 ,  C07C57/04

    摘要： The invention relates to a method for the heterogeneously catalysed partial gas phase oxidation of propene to form acrylic acid. According to said method, the initial mixture of reaction gas containing propene is oxidised, in a first reaction step, on a fixed-bed catalyst bed (1) consisting of a plurality of fixed-bed catalyst bed zones and arranged in two successive temperature zones A and B. The acrolein-containing product gas mixture of the first reaction step is then oxidised, in a second reaction step, on a fixed-bed catalyst bed (2) consisting of a plurality of fixed-bed catalyst bed zones and arranged in two successive temperature zones C and D. The transition from one temperature zone to another temperature zone does not spatially coincide with a transition from a fixed-bed catalyst bed zone to another fixed-bed catalyst bed zone within a reaction step.