Method for removing acrolein from the process gas of a heterogeneously catalysed oxidation of propene
    9.
    发明授权
    Method for removing acrolein from the process gas of a heterogeneously catalysed oxidation of propene 有权
    从异丙烯催化丙烯氧化的工艺气体中除去丙烯醛的方法

    公开(公告)号:US09334215B2

    公开(公告)日:2016-05-10

    申请号:US14762124

    申请日:2014-01-28

    IPC分类号: C07C45/35 C07C45/78 C07C45/82

    摘要: The invention relates to a process for separating acrolein from the process gas of a heterogeneously catalyzed oxidation of propene by means of atmospheric oxygen, wherein high boilers (including acrylic acid) are firstly separated off from the process gas by means of quenching and technical-grade acrolein having small proportions of low boilers is then obtained by means of absorption and subsequent distillation. Small amounts of a solvent by means of which, in particular, oligomers formed are separated off and the tendency for foam to be formed in the apparatuses or columns is reduced is added in the columns and heat exchangers in the work-up process. The solvent is, according to the invention, separated off and recycled in the form of an organic phase in-situ within the existing process.

    摘要翻译: 本发明涉及一种通过大气氧从异丙烯催化丙烯氧化的工艺气体中分离丙烯醛的方法,其中高沸点(包括丙烯酸)首先通过淬火和技术级分离工艺气体 然后通过吸收和随后的蒸馏获得具有小比例的低锅炉的丙烯醛。 在后处理过程中,在柱和热交换器中加入少量的溶剂,特别是所形成的低聚物被除去,并且在装置或塔中形成泡沫的趋势被减少。 根据本发明,溶剂在现有方法中分离并以有机相的形式在原位再循环。