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106 条记录 (耗时 0.044 秒)

    Dual-loop xylene isomerization process
    61.
    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

    申请人： Jeevan S. Abichandani ,  Jeffrey S. Beck ,  Stephen H. Brown ,  Ronald J. Cimini ,  Ivy D. Johnson ,  Dimitris K. Liguras ,  David L. Stern

    发明人： Jeevan S. Abichandani ,  Jeffrey S. Beck ,  Stephen H. Brown ,  Ronald J. Cimini ,  Ivy D. Johnson ,  Dimitris K. Liguras ,  David L. Stern

    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。

    Purification of Aromatic Feedstock
    68.
    发明申请
    Purification of Aromatic Feedstock 有权
    芳香原料的净化

    公开(公告)号：US20120048780A1

    公开(公告)日：2012-03-01

    申请号：US13186039

    申请日：2011-07-19

    申请人： Stephen H. Brown

    发明人： Stephen H. Brown

    IPC分类号： C10G25/00 ,  B01J19/00

    CPC分类号： C10G25/03 ,  C10G2300/1096 ,  C10G2300/201 ,  C10G2300/4081 ,  C10G2400/30

    摘要： The invention is a process for removing impurities from an aromatics stream and apparatus for the practice thereof, whereby trace olefins and dienes are removed from aromatic plant feedstocks using a reactor design that enables the product to be backmixed with the feedstock and that enables a feed/effluent heat exchanger.

    摘要翻译： 本发明是用于从芳族化合物流中除去杂质的方法及其实践的装置，其中使用能使产物与原料反混的反应器设计从芳族植物原料中除去痕量烯烃和二烯， 流出热交换器。

    Method of high pressure and high capacity oxygenate conversion with catalyst exposure cycle
    70.
    发明授权
    Method of high pressure and high capacity oxygenate conversion with catalyst exposure cycle 有权
    用催化剂曝光循环的高压和高容量含氧化合物转化方法

    公开(公告)号：US07763765B2

    公开(公告)日：2010-07-27

    申请号：US11698511

    申请日：2007-01-26

    申请人： Keith H. Kuechler ,  James H. Beech ,  Doron Levin ,  Stephen N. Vaughn ,  Stephen H. Brown

    发明人： Keith H. Kuechler ,  James H. Beech ,  Doron Levin ,  Stephen N. Vaughn ,  Stephen H. Brown

    IPC分类号： C07C1/00

    CPC分类号： C07C1/20 ,  B01J29/90 ,  B01J38/06 ,  C07C2529/85 ,  C08F10/00 ,  C10G3/49 ,  C10G3/57 ,  C10G3/62 ,  C10G2300/308 ,  C10G2300/4012 ,  C10G2300/4018 ,  C10G2300/802 ,  C10G2300/805 ,  C10G2400/20 ,  Y02P20/584 ,  Y02P30/20 ,  Y02P30/42 ,  C07C11/02 ,  C08F2/00

    摘要： A gas-solids reaction system is provided for improving product recovery in a multiple reactor reaction system. An oxygenate feedstock, desirably of high concentration in oxygenate, is reacted with a catalyst having a low to modest acidity and a Si/Al2 ratio of from 0.10 to 0.32. The reaction occurs in a reaction zone of a fluidized bed reactor at an oxygenate partial pressure of at least 45 psia and a reactor gas superficial velocity of at least 10 ft/s, conveying catalyst through the reaction zone to a circulation zone. The catalyst undergoes displacement with an inert gas in the circulation zone at a displacement gas superficial velocity of at least 0.03 m/s, after which at least a portion, preferably a large portion is returned to the reaction zone. The catalyst has a residence time in the circulation zone of at least twice that of the residence time of catalyst in the reaction zone. Extraordinary catalyst activity at high olefin selectivity results despite insignificant changes in coke on catalyst and coke yield when compared to lower pressure operations.

    摘要翻译： 提供了一种气体 - 固体反应系统，用于改善多反应器反应体系中的产物回收。 含氧化合物中期望含有高浓度的含氧化合物原料与低至中等酸度和Si / Al 2比为0.10至0.32的催化剂反应。 反应在流化床反应器的反应区中发生，氧化分压至少为45psia，反应器气体表观速度为至少10ft / s，将催化剂通过反应区输送到循环区。 催化剂在循环区中以惰性气体置换，位移气体空速为至少0.03m / s，此后至少一部分，优选大部分返回到反应区。 催化剂在循环区中的停留时间至少是催化剂在反应区中的停留时间的两倍。 尽管与较低压力操作相比，尽管催化剂上的焦炭和焦炭产率都没有显着变化，但是在高烯烃选择性方面具有特殊的催化剂活性。