Rhenium-and caesium-based metathesis catalyst and a process for converting C4 olefinic cuts by metathesis
    2.
    发明申请
    Rhenium-and caesium-based metathesis catalyst and a process for converting C4 olefinic cuts by metathesis 失效
    铼和铯基复分解催化剂和通过复分解转化C4烯烃切割的方法

    公开(公告)号:US20020143222A1

    公开(公告)日:2002-10-03

    申请号:US09897460

    申请日:2001-07-03

    IPC分类号: B01J023/36 C07C006/04

    摘要: The present invention provides a catalyst and a process for metathesis of olefinic C4 cuts. The catalyst contains rhenium, caesium and delta alumina. The preferred catalyst contains at least one rhenium compound deposited on a support principally composed of alumina, treated at a temperature of more than 750null C., and modified by at least one caesium compound. Thus the duration of the cycle between two regeneration operations is substantially increased. Application to a process for the production of propylene from an olefinic C4 cut in three steps: selective hydrogenation of butadiene with isomerisation of 1-butene to 2-butene, separation by distillation of the major portion of the isobutene, and metathesis of the cut rich in 2-butene with ethylene.

    摘要翻译: 本发明提供催化剂和烯烃C4馏分的复分解方法。 催化剂含有铼,铯和δ氧化铝。 优选的催化剂含有沉积在主要由氧化铝组成的载体上的至少一种铼化合物,其在大于750℃的温度下处理并被至少一种铯化合物修饰。 因此,两个再生操作之间的循环的持续时间显着增加。 应用于从烯烃C4馏分中分三步制备丙烯的方法:将丁烯与1-丁烯异构化为2-丁烯进行选择性氢化,通过蒸馏大部分异丁烯进行分离,以及富集切割的复分解 在乙烯的2-丁烯中。