Process for using an improved catalyst for dehydrohalogenation
    2.
    发明公开
    Process for using an improved catalyst for dehydrohalogenation 失效
    Katalytisches Dehydrohalogenierungsverfahren。

    公开(公告)号:EP0428791A1

    公开(公告)日:1991-05-29

    申请号:EP89202983.6

    申请日:1989-11-24

    申请人: DowElanco

    IPC分类号: C07C25/24 C07C17/34 B01J21/04

    摘要: A process for preparing an α-substituted styrene, such as 2-(3,5-dichlorophenyl)-4,4,4-trichloro-­1-butene, comprising reacting, in the absence of an added Lewis acid, an α-haloalkylbenzene, such as 3-(3,5-­dichlorophenyl)-1,1,1,3-tetrachlorobutane, with γ-­alumina dried to a moisture content between zero to 12 percent by weight is described herein. The γ-alumina serves to catalyze the dehydro-halogenation of the α-­haloalkylbenzene to produce the α-substituted styrene.

    摘要翻译: 一种制备α-取代的苯乙烯的方法,例如2-(3,5-二氯苯基)-4,4,4-三氯-1-丁烯,包括在没有加入的路易斯酸的情况下使α-卤代烷基苯 ,例如3-(3,5-二氯苯基)-1,1,1,3-四氯丁烷,其中γ-氧化铝被干燥至水分含量在0至12重量%之间。 γ-氧化铝用于催化α-卤代烷基苯的脱氢卤化以产生α-取代的苯乙烯。