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    Methods of Isomerizing Xylenes with a Catalyst Reduced in the Presence of Hydrogen and a Base
    1.
    发明申请
    Methods of Isomerizing Xylenes with a Catalyst Reduced in the Presence of Hydrogen and a Base 有权
    在氢和碱存在下还原催化剂异构化二甲苯的方法

    公开(公告)号：US20110046428A1

    公开(公告)日：2011-02-24

    申请号：US12940291

    申请日：2010-11-05

    Applicant: Scott H. Brown ,  Tin Tack Peter Cheung

    Inventor： Scott H. Brown ,  Tin Tack Peter Cheung

    IPC: C07C5/27

    CPC classification number: C07C5/2724 ,  C07C5/2708 ,  C07C5/2754 ,  C07C7/14841 ,  C07C2529/40 ,  C07C2529/44 ,  C07C2529/70 ,  Y02P20/52 ,  Y10S585/906 ,  C07C15/08

    Abstract: A xylene isomerization process includes introducing gas comprising hydrogen and a base to a reaction zone in which a catalyst comprising a Group VIII metal and a zeolite support resides. In one embodiment, the base may be formed in situ within the reaction zone from nitrogen and hydrogen that are introduced to the reaction zone. In another embodiment, the base is introduced directly to the reaction zone. The conditions in the reaction zone are effective to reduce the catalyst. A stream comprising C8 aromatics, e.g., xylenes and ethylbenzene may then be fed to the reaction zone containing the reduced catalyst. The reaction zone may be operated at conditions effective to isomerize the xylenes and hydrodealkylate the ethylbenzene. The xylene loss during the isomerization of the xylenes is lowered as a result of using the catalyst reduced in the presence of the gas comprising a base and hydrogen.

    Abstract translation: 二甲苯异构化方法包括将包含氢和碱的气体引入到其中包含第VIII族金属和沸石载体的催化剂所在的反应区。 在一个实施方案中，碱可以在反应区内从引入到反应区的氮和氢原位形成。 在另一个实施方案中，将碱直接引入反应区。 反应区中的条件对减少催化剂是有效的。 然后可以将包含C8芳族化合物（例如二甲苯和乙苯）的料流进料至含有还原催化剂的反应区。 反应区可以在有效地异构化二甲苯和加氢脱烷基化乙苯的条件下操作。 二甲苯异构化过程中二甲苯损失降低，因为使用在包含碱和氢的气体存在下还原的催化剂。

    Methods of isomerizing xylenes with a catalyst reduced in the presence of hydrogen and a base
    2.
    发明授权
    Methods of isomerizing xylenes with a catalyst reduced in the presence of hydrogen and a base 有权
    在氢和碱的存在下还原催化剂使二甲苯异构化的方法

    公开(公告)号：US07851664B2

    公开(公告)日：2010-12-14

    申请号：US11959872

    申请日：2007-12-19

    Applicant: Scott H. Brown ,  Tin Tack Peter Cheung

    Inventor： Scott H. Brown ,  Tin Tack Peter Cheung

    IPC: C07C5/27

    CPC classification number: C07C5/2724 ,  C07C5/2708 ,  C07C5/2754 ,  C07C7/14841 ,  C07C2529/40 ,  C07C2529/44 ,  C07C2529/70 ,  Y02P20/52 ,  Y10S585/906 ,  C07C15/08

    Abstract: A xylene isomerization process includes introducing gas comprising hydrogen and a base to a reaction zone in which a catalyst comprising a Group VIII metal and a zeolite support resides. In one embodiment, the base may be formed in situ within the reaction zone from nitrogen and hydrogen that are introduced to the reaction zone. In another embodiment, the base is introduced directly to the reaction zone. The conditions in the reaction zone are effective to reduce the catalyst. A stream comprising C8 aromatics, e.g., xylenes and ethylbenzene may then be fed to the reaction zone containing the reduced catalyst. The reaction zone may be operated at conditions effective to isomerize the xylenes and hydrodealkylate the ethylbenzene. The xylene loss during the isomerization of the xylenes is lowered as a result of using the catalyst reduced in the presence of the gas comprising a base and hydrogen.

    Abstract translation: 二甲苯异构化方法包括将包含氢和碱的气体引入到其中包含第VIII族金属和沸石载体的催化剂所在的反应区。 在一个实施方案中，碱可以在反应区内从引入到反应区的氮和氢原位形成。 在另一个实施方案中，将碱直接引入反应区。 反应区中的条件对减少催化剂是有效的。 然后可以将包含C8芳族化合物（例如二甲苯和乙苯）的料流进料至含有还原催化剂的反应区。 反应区可以在有效地异构化二甲苯和加氢脱烷基化乙苯的条件下操作。 二甲苯异构化过程中二甲苯损失降低，因为使用在包含碱和氢的气体存在下还原的催化剂。

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