化学
沸石
硅酸铝
铝酸钠
结晶
无机化学
氢氧化钾
钾
氢氧化钠
碱度
成核
铝硅酸钠
钠
核化学
化学工程
催化作用
有机化学
铝
工程类
作者
Joaquín Pérez-Pariente,Johan A. Martens,Peter A. Jacobs
出处
期刊:Applied Catalysis
[Elsevier]
日期:1987-01-01
卷期号:31 (1): 35-64
被引量:222
标识
DOI:10.1016/s0166-9834(00)80665-x
摘要
Zeolite BETA is prepared in hydrothermal conditions from tetraethyl orthosilicate, sodium aluminate, tetraethylammonium hydroxide, sodium and potassium hydroxide and water. Detailed chemical analysis of intermediate solid and liquid phases obtained from a large number of gel compositions at different synthesis times as well as SEM and XRD investigations of the solids allow to determine the crystallization mechanism. After nucleation in solution zeolite BETA crystals grow by incorporating TEA-aluminosilicate species from solution. The influence on this process of sodium, potassium, tetraethylammonium, silica, alumina and alkalinity in the gel are discussed.
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