Catalyst selectivation
    1.
    发明授权
    Catalyst selectivation 失效
    催化剂选择

    公开(公告)号:US06613708B1

    公开(公告)日:2003-09-02

    申请号:US09327241

    申请日:1999-06-07

    IPC分类号: B01J2904

    摘要: It has been discovered that catalysts may be modified by depositing an agent derivative from an agent such as an organometallic compound upon them. Such a modification gives a catalyst useful in increased selectivity to para-substituted alkyl benzenes, such as para-xylene (PX), through reacting an aromatic compound such as toluene and/or benzene with a methylating agent from hydrogen and carbon monoxide and/or carbon dioxide and/or methanol. Using these selectivated catalysts, para-substituted alkyl benzenes can be recovered in a selectivity of 80% or greater, significantly better than the equilibrium concentration of 24%.

    摘要翻译: 已经发现,可以通过从其中的试剂如有机金属化合物沉积试剂衍生物来改变催化剂。 通过使芳族化合物如甲苯和/或苯与甲基化剂从氢气和一氧化碳和/或其混合物反应,这种改性可提供对对取代的烷基苯(如对二甲苯(PX))增加选择性的催化剂。 二氧化碳和/或甲醇。 使用这些选择性催化剂,可以以80%或更高的选择性回收对位取代的烷基苯,显着优于24%的平衡浓度。