Method of high pressure and high capacity oxygenate conversion with catalyst exposure cycle
    64.
    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

    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。

    Catalytic production of olefins at high methanol partial pressures
    68.
    发明授权
    Catalytic production of olefins at high methanol partial pressures 有权
    在高甲醇分压下催化生产烯烃

    公开(公告)号:US06768034B2

    公开(公告)日:2004-07-27

    申请号:US10339044

    申请日:2003-01-09

    IPC分类号: C07C120

    摘要: Disclosed is a catalytic method for operating an oxygenate to olefins conversion reaction to provide a substantial quantity of prime olefin in the product. The product is provided by operating within desired parameters of weight hourly space velocity and oxygenate partial pressure. Operating the reaction to supply oxygenate at an oxygenate proportion index of at least 0.5, and controlling weight hourly space velocity and molar flow rate of oxygenate to the reactor to maintain a partial pressure-velocity compensation factor of at least 0.1 psia−1hr−1, a prime olefin selectivity of at least 45 wt. % can be maintained.

    摘要翻译: 公开了一种用于操作含氧化合物至烯烃转化反应以在产品中提供大量初烯烃的催化方法。 该产品通过在重时小时空间速度和含氧化合物分压的期望参数内操作来提供。 操作该反应以以含氧化合物比例指数为至少0.5提供含氧化合物,并控制含氧化合物与反应器的重量时空速和摩尔流速以保持至少0.1psia -1小时的分压力 - 速度补偿系数 <-1>,至少45重量%的主要烯烃选择性。 可以维持%。