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。