Process for separation of C8 aromatic compounds with limited recycling
    2.
    发明授权
    Process for separation of C8 aromatic compounds with limited recycling 有权
    C8芳香族化合物分离方法有限回收利用

    公开(公告)号:US09227891B2

    公开(公告)日:2016-01-05

    申请号:US12253382

    申请日:2008-10-17

    摘要: Process for the production of paraxylene from a C8 aromatic feedstock that comprises the following stages: A stage for separation by adsorption in a simulated moving bed SMB that produces an extract that contains at least 95% paraxylene and at least one raffinate R that contains ethylbenzene, A recycling of raffinate to the SMB separation stage after isomerization, in which R is separated in membrane separation means to obtain a first fraction F1 that is relatively high in ethylbenzene, which is purged, and an additional fraction F2 that is relatively low in ethylbenzene, which is recycled to the SMB after a single isomerization, preferably in the liquid phase.

    摘要翻译: 用于从C8芳族原料生产对二甲苯的方法,其包括以下阶段:用于通过模拟移动床中的吸附分离的阶段SMB,其产生含有至少95%对二甲苯和至少一种含乙苯的萃余液R的萃取物, 在异氰酸化后将萃余液再循环到SMB分离阶段,其中R在膜分离装置中分离以获得被吹扫的乙苯中相对较高的第一馏分F1和乙苯中相对低的另外馏分F2, 其在单一异构化之后再循环至SMB,优选在液相中。

    PROCESS FOR SEPARATION OF C8 AROMATIC COMPOUNDS WITH LIMITED RECYCLING
    6.
    发明申请
    PROCESS FOR SEPARATION OF C8 AROMATIC COMPOUNDS WITH LIMITED RECYCLING 有权
    用于分离具有回收的C8芳族化合物的方法

    公开(公告)号:US20090149686A1

    公开(公告)日:2009-06-11

    申请号:US12253382

    申请日:2008-10-17

    IPC分类号: C07C5/22

    摘要: Process for the production of paraxylene from a C8 aromatic feedstock that comprises the following stages: A stage for separation by adsorption in a simulated moving bed SMB that produces an extract that contains at least 95% paraxylene and at least one raffinate R that contains ethylbenzene, A recycling of raffinate to the SMB separation stage after isomerization, in which R is separated in membrane separation means to obtain a first fraction F1 that is relatively high in ethylbenzene, which is purged, and an additional fraction F2 that is relatively low in ethylbenzene, which is recycled to the SMB after a single isomerization, preferably in the liquid phase.

    摘要翻译: 用于从C8芳族原料生产对二甲苯的方法,其包括以下阶段:用于通过模拟移动床中的吸附分离的阶段SMB,其产生含有至少95%对二甲苯和至少一种含乙苯的萃余液R的萃取物, 在异氰酸化后将萃余液再循环到SMB分离阶段,其中R在膜分离装置中分离以获得被吹扫的乙苯中相对较高的第一馏分F1和乙苯中相对低的另外馏分F2, 其在单一异构化之后再循环至SMB,优选在液相中。