Process for preparing an hydrothermally stable, large crystallite sized, highly crystallite sized, highly crystalline synthetic faujasite zeolite
    2.
    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

    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。