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    • 35. 发明授权
    • Process for producing monoalkenyl aromatic hydrocarbon compound
    • 单链烯基芳烃化合物的制备方法
    • US5527977A
    • 1996-06-18
    • US266145
    • 1994-06-27
    • Makoto TakagawaKenichi NakamuraKinji KatoAkio HashimotoTakayo Sasaki
    • Makoto TakagawaKenichi NakamuraKinji KatoAkio HashimotoTakayo Sasaki
    • B01J23/04C07C2/72C07C15/44
    • C07C15/44B01J23/04C07C2/72C07C2523/02C07C2523/04
    • Their is disclosed a process for producing a monoalkenyl aromatic hydrocarbon compound (e.g. 5-(o-tolyl)-2-pentene) which comprises the steps of alkenylating a side chain of an aromatic hydrocarbon compound having at lease one hydrogen atom bonded to .alpha.-position of the side chain (e.g. alkylbenzene) by the use of a conjugated diene having 4 to 5 carbon atoms (e.g. 1-3 butadiene) in the presence an alkali metal-based catalyst supported on a carrier; removing at least part of the catalyst from the resultant reaction product by separating the same; inactivating and optionally removing the catalyst contained in the reaction product; and thereafter distilling the reaction produce in liquid form to separate and recover the objective monoalkenyl aromatic hydrocarbon compound. By virtue of using the above specific method, the process can prevent the change in quality and properly of the objective product even during atmospheric distillation, produce the objective product with high purity in high recovery race and operate a distillation column during a long stable period of time.
    • 公开了一种制备单链烯基芳族烃化合物(例如5-(邻甲苯基)-2-戊烯)的方法,该方法包括使具有至少一个氢原子的芳族烃化合物的侧链链烯基化的步骤, 在负载在载体上的碱金属类催化剂存在下,通过使用具有4至5个碳原子的共轭二烯(例如1-3个丁二烯),侧链(例如烷基苯)的位置; 通过分离其从所得反应产物中除去至少一部分催化剂; 灭活和任选地除去反应产物中所含的催化剂; 然后以液体形式蒸馏反应产物以分离和回收目标单链烯基芳族烃化合物。 通过使用上述具体方法,该方法即使在常压蒸馏中也可以防止目标产物的质量变化和适当的改变,在高回收率种族中生产高纯度的目的产物,并在长时间稳定的时间段内操作蒸馏塔 时间。