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    Selective hydrogenation of unsaturated aliphatic hydrocarbons in predominantly aromatic streams
    2.
    发明授权
    Selective hydrogenation of unsaturated aliphatic hydrocarbons in predominantly aromatic streams 失效
    主要是芳族物流中不饱和脂肪烃的选择性氢化

    公开(公告)号：US08350106B2

    公开(公告)日：2013-01-08

    申请号：US12165291

    申请日：2008-06-30

    申请人： Deng-Yang Jan ,  Michael A. Schultz

    发明人： Deng-Yang Jan ,  Michael A. Schultz

    IPC分类号： C07C5/05

    CPC分类号： C07C15/46 ,  C07C2/66 ,  C07C5/333 ,  C07C7/163 ,  C07C15/073

    摘要： The selective saturation of unsaturated aliphatic hydrocarbons (e.g., diolefins) in a hydrogenation feed stream comprising an aromatic compound (e.g., benzene) and one or more nitrogen compounds renders it beneficial when the stream or a portion thereof is subsequently treated (e.g., with a zeolitic adsorbent) to remove nitrogen. In particular, the selective saturation of, for example, olefins and diolefins prolongs the life of the nitrogen guard bed. In a representative embodiment, the selective hydrogenation is applied to a recycle benzene-containing stream recovered in the separation section (e.g., from the benzene/toluene splitter overhead) of a styrene production process, prior to treatment with a nitrogen guard bed adsorbent.

    摘要翻译： 在包含芳族化合物（例如苯）和一种或多种氮化合物的氢化进料流中，不饱和脂族烃（例如二烯烃）的选择性饱和使其在后续处理流或其一部分时（例如， 沸石吸附剂）去除氮气。 特别地，例如烯烃和二烯烃的选择性饱和延长了氮保护床的寿命。 在代表性的实施方案中，在用氮保护床吸附剂处理之前，将选择性氢化应用于在苯乙烯生产方法的分离段（例如苯/甲苯分离器塔顶馏出物）中回收的再循环含苯物流。