Method of high pressure and high capacity oxygenate conversion with catalyst exposure cycle
    43.
    发明申请
    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:US20070232844A1

    公开(公告)日:2007-10-04

    申请号:US11698511

    申请日:2007-01-26

    IPC分类号: C07C1/00

    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。 含氧化合物的含氧化合物原料,优选在含氧化合物中的高浓度与具有低至适度酸度和0.10 / 0.32的Si / Al 2 O比的催化剂反应。 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。

    Stripping hydrocarbon in an oxygenate conversion process
    49.
    发明授权
    Stripping hydrocarbon in an oxygenate conversion process 失效
    在含氧化合物转化过程中汽提碳氢化合物

    公开(公告)号:US06613950B1

    公开(公告)日:2003-09-02

    申请号:US09587766

    申请日:2000-06-06

    IPC分类号: C07C100

    摘要: A process for method for the production of olefin product from an oxygenate-containing feedstock includes exposing a silicoaluminophosphate catalyst to an oxygenate-containing feedstock in a reaction zone under conditions effective to convert the oxygenate-containing feedstock to an olefin product, by stripping at least a portion of the exposed catalyst with a stripping gas; and returning at least a portion of the stripped catalyst directly to the reaction zone.

    摘要翻译: 用于从含氧化合物原料生产烯烃产物的方法的方法包括在有效将含氧化合物的原料转化为烯烃产物的条件下,在反应区中将硅铝磷酸盐催化剂暴露于含氧化合物的原料,至少通过汽提 一部分暴露的催化剂与汽提气体; 并将至少一部分汽提的催化剂直接返回到反应区。