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    • 8. 发明申请
    • CONVERSION OF AN ALCOHOLIC OXYGENATE TO PROPYLENE USING MOVING BED TECHNOLOGY AND AN ETHERIFICATION STEP
    • 使用移动床技术和过滤步骤将醇性氧化剂转化为丙烯
    • WO2006036293A1
    • 2006-04-06
    • PCT/US2005/027409
    • 2005-08-01
    • UOP LLCKALNES, Tom N.WEI, Daniel H.GLOVER, Bryan K.
    • KALNES, Tom N.WEI, Daniel H.GLOVER, Bryan K.
    • C07C1/00
    • C07C11/06C07C1/20C07C2529/40C07C2529/85Y02P20/52Y02P20/584
    • The average propylene selectivity per on-stream cycle of an alcoholic oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is substantially enhanced by the use of a feed pretreatment step involving a catalytic etherification reaction, by switching to moving bed reactor technology in the olefin synthesis portion of the OTP flow scheme in lieu of fixed bed technology and by the selection of a catalyst on-stream cycle time of 300 hours or less. These provisions hold the build-up of coke deposits to a level which does not substantially degrade catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling maintenance of propylene average cycle yield at essentially start-of-cycle levels. The propylene average cycle yield improvement of the present invention over that achieved by the fixed bed system of the prior art is of the order of about 1.5 to 5.5 wt % or more.
    • 通过使用包含催化醚化反应的进料预处理步骤,使用一种或多种双功能含氧化合物转化催化剂的固定床的酒精含氧化合物对丙烯(OTP)方法的每个流动循环的平均丙烯选择性大大提高, 通过在OTP流动方案的烯烃合成部分中切换到移动床反应器技术来代替固定床技术,并且通过选择300小时以下的催化剂流动循环时间。 这些规定使焦炭沉积物的积聚达到不会显着降低催化剂活性,含氧化合物转化率和丙烯选择性的水平,从而能够在基本上循环水平的基础上维持丙烯平均循环产率。 与现有技术的固定床系统相比,本发明的丙烯平均循环产率提高约为1.5〜5.5重量%以上。