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    • 16. 发明授权
    • Process for preparing a rhenium and cesium based metathesis catalyst
    • 制备铼和铯基复分解催化剂的方法
    • US06277781B1
    • 2001-08-21
    • US09413192
    • 1999-10-05
    • Dominique CommereucFrançois HuguesLucien Saussine
    • Dominique CommereucFrançois HuguesLucien Saussine
    • B01J2304
    • C07C6/04B01J23/36C07C2521/04C07C2523/04C07C2523/36Y02P20/52
    • The present invention provides a catalyst and a process for metathesis of olefinic C4 cuts. The catalyst contains rhenium, cesium 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 750° C., and modified by at least one cesium compound. With the use of the catalyst, the duration of the cycle between two regeneration operations can be substantially increased. The catalyst is suitable for use in a process for production of propylene from an olefinic C4 cut in three steps: (1) selective hydrogenation of butadiene with isomerisation of 1-butene to 2-butene, (2) separation by distillation of the major portion of the isobutene, and (3) metathesis of the cut rich in 2-butene with ethylene.
    • 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。 通过使用催化剂,可以显着增加两次再生操作之间的循环持续时间。 该催化剂适用于以下三个步骤从烯烃C4馏分生产丙烯的方法:(1)丁烯与1-丁烯异构化至2-丁烯的选择性氢化,(2)通过主蒸馏分离 的异丁烯,(3)富含2-丁烯的馏分与乙烯的复分解。