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    FLUID CATALYTIC CRACKING (FCC) PROCESS FOR MANUFACTURING PROPYLENE AND ETHYLENE IN INCREASED YIELD
    5.
    发明申请
    FLUID CATALYTIC CRACKING (FCC) PROCESS FOR MANUFACTURING PROPYLENE AND ETHYLENE IN INCREASED YIELD 有权
    流化床催化裂化（FCC）在增加乙烯和乙烯中制备丙烯和乙烯的方法

    公开(公告)号：US20110240523A1

    公开(公告)日：2011-10-06

    申请号：US13133759

    申请日：2009-12-08

    申请人： Sukumar Mandal ,  Asit Kumar Das ,  Ashwani Yadav ,  Manoj Yadav ,  Akhilesh Bhatnagar ,  Rajeshwar Dongara ,  Veera Venkata satya Bhaskara sita Rama Murthy Katravulapalli

    发明人： Sukumar Mandal ,  Asit Kumar Das ,  Ashwani Yadav ,  Manoj Yadav ,  Akhilesh Bhatnagar ,  Rajeshwar Dongara ,  Veera Venkata satya Bhaskara sita Rama Murthy Katravulapalli

    IPC分类号： C10G11/04

    CPC分类号： C10G11/18 ,  C10G11/05 ,  C10G2400/20

    摘要： A fluid catalytic cracking (FCC) process for manufacturing propylene and ethylene in increased yield. The process comprises cracking an olefinic naphtha stream and main hydrocarbon stock in combination with an olefinic C4 hydrocarbon stream in different zones of one or more risers of an FCC unit. Each FCC riser comprises an acceleration zone at the lower portion thereof, a lift stream feed nozzle at the bottom of the acceleration zone, a main hydrocarbon stock feed nozzle above the acceleration zone and an olefinic naphtha feed nozzle at a location along the acceleration zone between the lift stream feed nozzle and main hydrocarbon stock feed nozzle. The cracking is carried out on a mixed FCC catalyst comprising at least 2 percent by weight pentasil zeolite and at least 10 percent by weight Y-zeolite. The catalyst is injected at the bottom of each FCC riser, the olefinic naptha is injected through the olefinic feed nozzle, the main hydrocarbon stock is injected through the main hydrocarbon stock feed nozzle and the lift stream is injected through the lift stream feed nozzle at the bottom of the acceleration zone. The lift stream comprises the olefinic C4 hydrocarbon stream with or without steam and/or a fuel gas. The olefinic C4 hydrocarbon steam is cracked in the acceleration zone at 600 to 8000° C. and pressure of 0.8 to 5 kg/cm up 2 (gauge) and weight hourly space velocity (WHSV) of 0.2 to 100 hr up 1 and vapour residence time of 0.2 to 5 seconds.

    摘要翻译： 用于以增加的产率制造丙烯和乙烯的流化催化裂化（FCC）方法。 该方法包括在FCC单元的一个或多个立管的不同区域中与烯属烃石脑油流和主要烃类物料一起裂化。 每个FCC提升管包括其下部的加速区，加速区底部的升力流进料喷嘴，加速区上方的主烃储料供给喷嘴和沿加速区的位置处的烯烃石脑油进料喷嘴， 升降机进料喷嘴和主油料进料喷嘴。 裂化在包含至少2重量百分比的pentasil沸石和至少10重量％Y-沸石的混合FCC催化剂上进行。 在每个FCC提升管的底部注入催化剂，通过烯烃进料喷嘴注入烯烃萘，主要烃类原料通过主要烃类原料进料喷嘴注入，提升流通过提升料流进料喷嘴注入 底部的加速区。 提升流包括具有或不具有蒸汽和/或燃料气体的烯烃C4烃流。 烯烃C4烃蒸汽在600-8000℃的加速区裂化，压力为0.8-5kg / cm 2（表压），重时空速（WHSV）为0.2〜100小时-1，蒸汽停留 时间为0.2〜5秒。