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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

    申请人： 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

    发明人： 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分类号： B01J29/80 ,  C10G11/05 ,  C10G11/18 ,  C10G11/00

    CPC分类号： B01J29/80 ,  C10G2400/20 ,  C10G2400/28

    摘要： 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.

    摘要翻译： 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。

    Process for preparing an hydrothermally stable, large crystallite sized, highly crystallite sized, highly crystalline synthetic faujasite zeolite
    5.
    发明授权
    Process for preparing an hydrothermally stable, large crystallite sized, highly crystallite sized, highly crystalline synthetic faujasite zeolite 有权
    制备水热稳定，大晶粒尺寸，高度微晶尺寸，高度结晶的合成八面沸石沸石的方法

    公开(公告)号：US06284218B1

    公开(公告)日：2001-09-04

    申请号：US09158817

    申请日：1998-09-23

    申请人： Mohan Prabhu Kuvettu ,  Manoranjan Santra ,  Venkatachalam Krishnan ,  Sanjay Kumar Ray ,  Christopher J ,  Ganga Shanker Mishra ,  Ram Mohan Thakur ,  Satish Makhija ,  Soban Ghosh

    发明人： Mohan Prabhu Kuvettu ,  Manoranjan Santra ,  Venkatachalam Krishnan ,  Sanjay Kumar Ray ,  Christopher J ,  Ganga Shanker Mishra ,  Ram Mohan Thakur ,  Satish Makhija ,  Soban Ghosh

    IPC分类号： C01B3920

    CPC分类号： C01B39/20 ,  Y10S423/21

    摘要： A synthetic faujasite zeolite and a process for preparing the same which includes forming a reaction mixture consisting essentially of water, a source of silica, a source of alumina, Na2O nd nucleation centers, wherein the reaction mixture has molar ratios of constituents including Na2O/SiO2, 0.4-0.9; SiO2/Al2O3, 7-13; and H2O/Na2O, 30-45, and wherein the nucleation centers have molar ratios of constituents including Na2O/SiO2, 0.5-2.0; SiO2/Al203, 10-20; and H2O/Na2O, 10-40; and heating the reaction mixture to a temperature ranging from 90 to 110° C. for a time period ranging from 23 to 29 hours to obtain the synthetic faujasite zeolite, wherein the synthetic faujasite zeolite has a crystallite size ranging from 1500 to 2000 Å, a particle size ranging from 4000 to 8000 Å, and a retention of surface of more than 70% of that of a parent zeolite, when exchanged with ammonia and subjected to hydrothermal treatment at 650° C. for 3 hours and with 100% steam.

    摘要翻译： 合成八面沸石及其制备方法，其包括形成基本上由水，二氧化硅源，氧化铝源，Na 2 O和成核中心组成的反应混合物，其中反应混合物具有包括Na 2 O / SiO 2 ，0.4-0.9; SiO2 / Al2O3,7-13; 和H 2 O / Na 2 O，30-45，并且其中成核中心具有包括Na 2 O / SiO 2，0.5-2.0的组成的摩尔比; SiO2 / Al2O3,10-20; 和H2O / Na2O，10-40; 并将反应混合物加热到90〜110℃的温度，时间为23〜29小时，得到合成八面沸石沸石，其中合成八面沸石沸石的微晶尺寸为1500〜2000， 颗粒尺寸范围为4000至8000，并且当与氨交换时，保留表面超过母体沸石的70％，并在650℃下进行水热处理3小时，并用100％蒸汽进行水热处理。