VERFAHREN ZUR HERSTELLUNG VON CYCLOHEXAN AUS BENZOL UND METHYLCYCLOPENTAN MIT VORGESCHALTETER BENZOLHYDRIERUNG
    2.
    发明公开
    VERFAHREN ZUR HERSTELLUNG VON CYCLOHEXAN AUS BENZOL UND METHYLCYCLOPENTAN MIT VORGESCHALTETER BENZOLHYDRIERUNG 有权
    用于生产环己烷苯和甲基环戊烷与上游苯加氢

    公开(公告)号:EP3134376A1

    公开(公告)日:2017-03-01

    申请号:EP15716549.9

    申请日:2015-04-20

    申请人: BASF SE

    IPC分类号: C07C5/10 C07C5/29 C07C13/18

    摘要: The present invention concerns a process for preparing cyclohexane from methylcyclopentane (MCP) and benzene. In the present invention, MCP and benzene are constituents of a hydrocarbon mixture (KG1) also including dimethylpentanes (DMP), optionally cyclohexane and optionally at least one compound (low boiler) selected from non-cyclic C
    5 -C
    6 alkanes and cyclopentane. First, benzene is reacted in a hydrogenation step to give cyclohexane (present in the hydrocarbon mixture (KG2)), while MCP is isomerized to cyclohexane in the presence of a catalyst, preferably an acidic ionic liquid. After the hydrogenation but before the isomerization, the dimethylpentanes (DMP) are removed, and initially the cyclohexane present in the hydrocarbon mixture (KG2) is removed together with DMP. This pre-isomerization cyclohexane can be freed of DMP again in a downstream step of rectification and isolated and/or returned to the cyclohexane preparation process. If the hydrocarbon mixture (KG1) comprises low boilers, they can be removed between DMP removal and MCP isomerization. Following the isomerization comes the isolation of the cyclohexane, with optional recycling of unisomerized MCP and any low boilers. The hydrocarbon mixture (KG1) preferably includes cyclohexane and/or low boilers, and so low-boiler removal between DMP removal before isomerization is a preferred operation. Also preferred is an additional removal of DMP from the cyclohexane - that is, the cyclohexane fraction arising from the benzene hydrogenation and possibly forming part of the starting mixture (KG1) is isolated and hence recovered.

    摘要翻译: 本发明涉及一种用于从甲基环戊烷(MCP)和苯制备环己烷的方法。 在本发明的上下文中,MCP和苯是烃混合物(HM1)另外包括dimethylpentanes(DMP)的成分,可能是环己烷和无环C5-C6链烷烃和环戊烷选择可能的至少一种化合物(低沸点)。 首先,苯转化成氢化步骤以环己烷(即存在于烃混合物(HM2)),而MCP在催化剂的存在下异构化,优选的酸性离子液体,环己烷。 所述dimethylpentanes(DMP)被删除到异构化氢化,但先前的后,与初始移除存在于烃混合物(HM2)用DMP一起环己烷。 此环己烷已经存在之前的异构化可以再次从DMP在下游精馏步骤中分离和分离和/或再循环到用于制备环己烷的过程。 之间的DMP去除和MCP异构化 - 如果低沸点是存在于烃混合物(HM1) - 低沸物,任选地除去。 异构化后,环己烷是孤立的,任选低沸点的未异构化的MCP和可选的回报。 优选地,环己烷和/或低沸点是存在于烃混合物(HM1)等的低沸物分离从异构化的DMP之间去除优选进行。 这是另外优选并除去从DMP环己烷的附加传导,意思没有环己烷组分在苯加氢它产生,并且可以存在于起始混合物(HM1)是分离的,因此回收。

    VERFAHREN ZUR HERSTELLUNG VON CYCLOHEXAN MIT EINER VORABTRENNUNG VON DIMETHYLPENTANEN

    公开(公告)号:EP2909158A1

    公开(公告)日:2015-08-26

    申请号:EP13779553.0

    申请日:2013-10-16

    申请人: BASF SE

    IPC分类号: C07C5/10 C07C5/29

    摘要: The present invention relates to a method for producing cyclohexane from benzene and/or methylcyclopentane (MCP) by hydrogenation or isomerisation. Prior to cyclohexane production, the dimethylpentanes (DMP) are separated in a distillation device (D1) from a hydrocarbon mixture (KG1) which contains DMP in addition to benzene and/or MCP. If cyclohexane is already present in the hydrocarbon mixture (KG1), the cyclohexane is separated initially with DMP in conjunction with benzene and/or MCP. The already present cyclohexane can be re-separated from DMP in a subsequent distillation step and can be recycled into the process in order to produce cyclohexane.

    摘要翻译: 本发明涉及通过氢化或异构化从苯和/或甲基环戊烷(MCP)生产环己烷的方法。 在环己烷生产之前,二甲基戊烷(DMP)在蒸馏装置(D1)中除与苯和/或MCP以外含有DMP的烃混合物(KG1)分离。 如果烃混合物(KG1)中已经存在环己烷,则首先用DMP和苯和/或MCP分离环己烷。 已经存在的环己烷可以在随后的蒸馏步骤中从DMP中重新分离,并且可以再循环到该方法中以产生环己烷。