以拟薄水铝石为铝源合成的β沸石的表征和催化性能(英文)

考察了以拟薄水铝石为铝源、固体硅胶为硅源、四乙基氢氧化铵为模板剂时不同晶化混合液ＳｉＯ２／Ａｌ２Ｏ３比和不同晶化温度对β沸石合成的影响。ＸＲＤ、ＴＧＡ、ＩＣＰ及ＳＥＭ研究结果表明，在晶化混合液ＳｉＯ２／Ａｌ２Ｏ３比为２０至５０之间、晶化温度为１４０℃～１６０℃范围内能合成出高结晶度的β沸石，且β沸石硅铝比与晶化混合液硅铝比呈良好的线性关系：ＴＧＡ总失重量随β沸石硅铝比增加而增加，晶化温度对β沸石的晶粒度没有明显影响。此外，所制备的Ｈβ沸石对甲苯与Ｃ９芳烃歧化和烷基转移反应具有良好的催化性能。

CHARACTERIZATION AND CATALYTIC PERFORMANCE OF ZEOLITE BETA SYNTHESIZED USING PSEUDOBOEHMITE AS ALUMINIUM SOURCE

Zeolite beta is prepared by hydrothermal synthesis using pseudo- boehmite as aluminium source, solid silica gel as silicon source, and tetraethylammonium hydroxide as template. The influences of different SiO2/Al2O3 ratios in gel and different crystallization temperatures on the synthesis of zeolite beta are studied. The results determined by XRD, RGA, ICP and SEM indicate that the high crystallinity zeolite beta can be obtained with the SiO2/A12O3 mole ratio of gel being 20 to 50 at crystallization temperature being 140oC to 160oC, and that the SiO2/Al2O3 ratio has a god linear relationship between gel and zeolite beta.