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    • 3. 发明授权
    • Preparation of propene
    • 丙烯的制备
    • US6271430B2
    • 2001-08-07
    • US28320199
    • 1999-04-01
    • BASF AG
    • SCHWAB PETERHOEHN ARTHUR
    • C07C6/04C07C11/06C07C6/02
    • B01D3/141C07C6/04C07C11/06C07C2521/04C07C2523/36Y02P20/52
    • The present invention relates to a process for preparing propene by metathesis of olefins. The process comprises preparing propene bya) in a first reactor (R1), reacting 1-butene and 2-butene to give propene and 2-pentene in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb, or VIII of the Periodic Table of elements,b) subsequently separating the propene, unreacted raffinate II, and 2-pentene formed in a) in a distillation column (D1),c) subsequently reacting the 2-pentene of b) with ethene to give propene and 1-butene in a reactor (R2) in the presence of a metathesis catalyst comprising at least one compound of a metal of transition group VIb, VIIb, or VIII of the Periodic Table of Elements,d) subsequently separating the propene and 1-butene formed in c),e) subsequently returning the 1-butene formed in d) to step a) andf) wherein unreacted raffinate II is taken off at the middle off take of column D1 in b) and partly returned to step a).
    • 本发明涉及通过烯烃复分解制备丙烯的方法。 该方法包括通过在第一反应器(R1)中制备丙烯,使1-丁烯和2-丁烯反应得到丙烯和2-戊烯,在复分解催化剂存在下,该复分解催化剂包含至少一种转移基团VIb的金属化合物, Ⅶb或Ⅷ元素,b)随后将a)中形成的丙烯,未反应的残液II和2-戊烯分离在蒸馏塔(D1)中,c)随后使b)的2-戊烯与 乙烯在反应器(R2)中在复分解催化剂存在下给出丙烯和1-丁烯,所述复分解催化剂包含至少一种元素周期表的VIb,VIIb或VIII族过渡金属的化合物,d)随后将 丙烯和1-丁烯,e)随后将d)中形成的1-丁烯返回到步骤a)和f),其中未反应的残液II在b)中的中间馏分D1取出,并部分还原为 步骤a)。