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    Process for catalytic cracking of petroleum based feed stocks
    2.
    发明授权
    Process for catalytic cracking of petroleum based feed stocks 失效
    石油基原料催化裂化工艺

    公开(公告)号：US5846402A

    公开(公告)日：1998-12-08

    申请号：US855946

    申请日：1997-05-14

    Applicant: Sukumar Mandal ,  Suresh Kumarshah ,  Debasis Bhattacharyya ,  Vutukuru Lakshmi Narasimha Murthy ,  Asit Kumar Das ,  Sanjeev Singh ,  Ram Mohan Thakur ,  Shankar Sharma ,  Jagdev Kumar Dixit ,  Sobhan Ghosh ,  Satyen Kumar Das ,  Manoranjan Santra ,  Latoor Lal Saroya ,  Marri Rama Rao ,  Ganga Shanker Mishra ,  Satish Makhija

    Inventor： Sukumar Mandal ,  Suresh Kumarshah ,  Debasis Bhattacharyya ,  Vutukuru Lakshmi Narasimha Murthy ,  Asit Kumar Das ,  Sanjeev Singh ,  Ram Mohan Thakur ,  Shankar Sharma ,  Jagdev Kumar Dixit ,  Sobhan Ghosh ,  Satyen Kumar Das ,  Manoranjan Santra ,  Latoor Lal Saroya ,  Marri Rama Rao ,  Ganga Shanker Mishra ,  Satish Makhija

    IPC: B01J29/80 ,  C10G11/05 ,  C10G11/18 ,  C10G11/00

    CPC classification number: B01J29/80 ,  C10G2400/20 ,  C10G2400/28

    Abstract: A process for selective catalytic cracking of a petroleum-based feedstock to produce a product having a high yield of liquified petroleum gas (LPG) and light olefins having 3 to 4 carbons includes providing a fluidized bed reactor which is a high velocity riser, continuously circulating fluidized bed reactor; providing a solid acidic catalyst comprised of: from 1 to 6% by wt. of ultra stable Y-zeolite; from 8-25% by wt. of Pentasil zeolite which is shape selective; from 0-8% by wt. of an active material which is bottom selective; from 0-1% by wt. of rare earth constituents; and from 91 to 60% by wt. of nonacidic constituents and binder; charging the fluidized bed reactor with the solid acidic catalyst and the petroleum-based feedstock; and cracking the petroleum-based feedstock in the presence of the solid acidic catalyst in the fluidized bed reactor. The reactor is operated at a Weight Hourly Space Velocity (WHSV) ranging from 40 to 120 hr.sup.-1, a ratio of solid acidic catalyst to petroleum-based feedstock ranging from 15 to 25, a temperature at the top of the high velocity riser ranging from 530.degree. C. to 600.degree. C., recycled riser products ranging from 0 to 40%, a pressure in the fluidized bed reactor ranging from 1.0 to 4.0 kg/cm.sup.2 g, and an amount of steam for dilution and quenching of hydrocarbons ranging from 3 to 50 wt. % of the petroleum-based feedstock. The Pentasil zeolite has a pore size ranging from 5 to 6 .ANG. so that the catalyst is highly selective for LPG and C.sub.4 light olefins with minimum dry gas and coke make, and so that the vanadium tolerance of the catalyst is increased and ranges up to 21,000 PPM. The process produces a LPG yield ranging up to 40 to 65 wt. % of the fresh petroleum-based feedstock, a selectivity for the light olefins of at least 40 wt. %, and a selectivity for the LPG of at least 45 wt.

    Abstract translation: 选择性催化裂化石油基原料以生产具有高产率的液化石油气（LPG）和具有3至4个碳原子的轻质烯烃的产物的方法包括提供流化床反应器，其为高速提升管，连续循环 流化床反应器; 提供固体酸性催化剂，其包含：1至6重量％ 的超稳定Y型沸石; 8-25重量％。 具有形状选择性的pentasil沸石; 0-8重量％ 的底部选择性活性物质; 0-1重量％ 的稀土成分; 和91〜60重量％。 的非酸成分和粘合剂; 用固体酸性催化剂和石油基原料装入流化床反应器; 并在流化床反应器中在固体酸性催化剂存在下裂化石油基原料。 反应器以40至120小时-1的重量小时空间速度（WHSV）运行，固体酸性催化剂与石油基原料的比例为15至25，高速提升管顶部的温度范围 从530℃至600℃，循环的提升产品的范围为0至40％，流化床反应器的压力范围为1.0至4.0kg / cm2g，以及用于稀释和猝灭烃的蒸汽量 3〜50重量％ ％的石油基原料。 Pentasil沸石的孔径范围为5至6安格姆，使得催化剂对于具有最少干燥气体和焦炭的LPG和C4轻质烯烃具有高选择性，并且使得催化剂的耐钒性增加并且范围高达21,000 PPM。 该方法产生高达40至65重量％的LPG产率。 ％的新鲜石油基原料，轻质烯烃的选择性至少为40wt。 ％，并且LPG的选择性至少为45wt。

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