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首页> 外国专利> Process for preparing an hydrothermally stable, large crystallite sized, highly crystallite sized, highly crystalline synthetic faujasite zeolite

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

机译：制备水热稳定，大晶粒尺寸，高晶粒尺寸，高度结晶的合成八面沸石的方法

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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.
机译：合成八面沸石及其制备方法，包括形成基本上由水，二氧化硅源，氧化铝源，Na 2 Sub成核中心组成的反应混合物，其中反应混合物Na 2 O / SiO 2 等成分的摩尔比为0.4-0.9; SiO 2 / Al 2 O 3 ，7-13;和H 2 O / Na 2 O，30-45，其中成核中心具有包括Na 2 O / SiO在内的成分的摩尔比 2 ，0.5-2.0; SiO 2 / Al 2 0 3 ，10-20;和H 2 O / Na 2 O，10-40;将反应混合物加热至90-110℃。 C.在23至29小时的时间范围内获得合成八面沸石，其中所述合成八面沸石具有1500至2000 to的微晶尺寸，4000至8000 ranging的粒度和保留率。当与氨交换并在650℃下进行水热处理时，其表面积大于母体沸石表面的70％以上。 C. 3小时，并用100％蒸汽。

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