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    Process for the preparation of a catalyst composite
    3.
    发明授权
    Process for the preparation of a catalyst composite 有权
    制备催化剂复合材料的方法

    公开(公告)号：US06528447B1

    公开(公告)日：2003-03-04

    申请号：US09272305

    申请日：1999-03-19

    申请人： Sobhan Ghosh ,  Satish Makhija ,  Venkatachalam Krishnan ,  Sanjay Kumar Ray ,  Mohan Prabhu Kuvettu

    发明人： Sobhan Ghosh ,  Satish Makhija ,  Venkatachalam Krishnan ,  Sanjay Kumar Ray ,  Mohan Prabhu Kuvettu

    IPC分类号： B01J2908

    CPC分类号： B01J37/0045 ,  B01J21/12 ,  B01J29/084 ,  C10G11/05

    摘要： A process for preparing a hydrocarbon conversion catalyst for use in a Fluid Catalyst Cracking (FCC) unit includes the steps of preparing a modified alumina-silica composite by reacting alumina with an acid to obtain an acidified alumina, aging the acidified alumina for from 0.25 to 60 hours, adding a silica source to the acidified alumina to obtain the composite; preparing a dispersed precursor slurry of the modified alumina-silica composite, and a rare earth exchanged USY zeolite (REUSY) containing at least one rare earth oxide present in an amount ranging from 3.8 to 4.0 wt %, and optionally kaolin clay; spray-drying the slurry to obtain spherical particles; and subjecting the spherical particles to calcination.

    摘要翻译： 制备用于流化催化剂裂化（FCC）单元的烃转化催化剂的方法包括以下步骤：通过使氧化铝与酸反应以制备改性的氧化铝 - 二氧化硅复合物，以获得酸化的氧化铝，将酸化氧化铝老化0.25至 60小时，向酸化的氧化铝中加入二氧化硅源，得到复合材料; 制备改性氧化铝 - 二氧化硅复合材料的分散的前体浆液和含有至少一种以3.8-4.0重量％的量存在的稀土氧化物的稀土交换的USY沸石（REUSY），以及任选的高岭土; 喷雾干燥该浆料以获得球形颗粒; 并对球形颗粒进行煅烧。

    Ready-to-use seed composition and process thereof
    7.
    发明授权
    Ready-to-use seed composition and process thereof 有权
    即用种子组合物及其制备方法

    公开(公告)号：US07968079B2

    公开(公告)日：2011-06-28

    申请号：US11970780

    申请日：2008-01-08

    申请人： Biswanath Sarkar ,  Kapil Arya ,  Gopal Ravichandran ,  Mohan Prabhu Kuvettu ,  Shiba Prasad Choudhury ,  Venkatachalam Krishnan ,  Sanjay Kumar Ray ,  Jayaraj Christopher ,  Satish Makhija

    发明人： Biswanath Sarkar ,  Kapil Arya ,  Gopal Ravichandran ,  Mohan Prabhu Kuvettu ,  Shiba Prasad Choudhury ,  Venkatachalam Krishnan ,  Sanjay Kumar Ray ,  Jayaraj Christopher ,  Satish Makhija

    IPC分类号： C01B39/20

    CPC分类号： B01J29/084 ,  C01B33/20 ,  C01B39/20

    摘要： The present disclosure provides a ready-to-use seed composition water, a source of silica, a source of alumina, and Na20, wherein the molar ratio of H20:Na20 ranges from 5 to 20, Na20:SiO2 ranges from 0.4 to 5 and SiO2:Al203 ranges from 1.3 to 5 used in the preparation of a synthetic faujasite zeolite which has high thermal stability and higher crystallite size. It further provides a process for preparing the ready-to-use seed composition for preparation of synthetic faujasite zeolite that requires lower crystallization time. The present disclosure provides a seed composition that does not require maturing time and a reaction gel composition that has low water and soda content. The present disclosure further provides a process for the preparation of synthetic faujasite zeolite by blending seed and reaction gel reaction composition to form a seed gel composition and subjecting it to crystallization.

    摘要翻译： 本公开提供了即用型种子组合物水，二氧化硅源，氧化铝源和Na 2 O，其中H 2 O:Na 2的摩尔比为5至20，Na 2 O:SiO 2的范围为0.4至5，以及 SiO 2：Al 2 O 3在用于制备具有高热稳定性和较高微晶尺寸的合成八面沸石沸石中使用的范围为1.3至5。 它还提供了一种制备即用型种子组合物的方法，该种子组合物用于制备需要较低结晶时间的合成八面沸石沸石。 本公开提供了不需要熟化时间的种子组合物和具有低水和苏打含量的反应凝胶组合物。 本公开还提供了通过混合种子和反应凝胶反应组合物来制备合成八面沸石沸石以形成种子凝胶组合物并使其结晶的方法。

    Process for preparing an hydrothermally stable, large crystallite sized, highly crystallite sized, highly crystalline synthetic faujasite zeolite
    8.
    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。