Dual-loop xylene isomerization process
    4.
    发明授权
    Dual-loop xylene isomerization process 有权
    双环二甲苯异构化工艺

    公开(公告)号:US5977420A

    公开(公告)日:1999-11-02

    申请号:US139463

    申请日:1998-08-25

    IPC分类号: C07C15/08 C07C1/00 C07C5/22

    CPC分类号: C07C15/08 C07C2529/00

    摘要: A method for increasing the efficiency of xylene isomerization by using a two stage isomerization process. In the first stage of the process, a C.sub.9.sup.+ aromatics feedstock is subjected to ethylbenzene conversion and xylene isomerization. Non-C.sub.8 aromatics are removed from the effluent, which is then processed in a second stage of the process to remove para-xylene and isomerize the para-xylene depleted effluent. The effluent from the second stage isomerization unit is then recycled into the inlet of the second stage of the process and a slip stream from the para-xylene separator is recycled to the feedstock and to the effluent of the ethylbenzene conversion unit. In this way, the production of para-xylene is maximized. In a preferred embodiment, toluene is co-fed into the feedstock to minimize the loss of xylenes during the ethylbenzene conversion reaction.

    摘要翻译: 一种通过使用两级异构化方法提高二甲苯异构化效率的方法。 在该方法的第一阶段,C9 +芳烃原料进行乙苯转化和二甲苯异构化。 从流出物中除去非-C 8芳族化合物,然后在该方法的第二阶段中处理以除去对二甲苯并使对二甲苯贫乏的流出物异构化。 然后将来自第二级异构化单元的流出物再循环到该方法的第二阶段的入口中,并且来自对二甲苯分离器的滑流再循环至原料和乙苯转化单元的流出物。 以这种方式,对二甲苯的生产最大化。 在优选的实施方案中,将甲苯共同进料到原料中以使乙苯转化反应期间二甲苯的损失最小化。

    Porous crystalline materials, their synthesis and use
    5.
    发明授权
    Porous crystalline materials, their synthesis and use 有权
    多孔结晶材料,其合成和使用

    公开(公告)号:US08114195B2

    公开(公告)日:2012-02-14

    申请号:US12455732

    申请日:2009-06-05

    IPC分类号: B01D53/02 C01B39/00

    CPC分类号: C07F5/022

    摘要: A porous crystalline material has a tetrahedral framework comprising a general structure, M1-IM-M2, wherein M1 comprises a metal having a first valency, wherein M2 comprises a metal having a second valency different from said first valency, and wherein IM is imidazolate or a substituted imidazolate linking moiety.

    摘要翻译: 多孔结晶材料具有包含一般结构M1-IM-M2的四面体骨架,其中M1包含具有第一价态的金属,其中M2包含具有不同于所述第一价态的第二价态的金属,并且其中IM为咪唑酸盐或 取代的咪唑酸酯连接部分。