The synthesis of small crystals of high alumina UTD-1 zeolites

We have explored various synthesis parameters that affect the crystal morphology and acid site density of UTD-1 zeolites. In contrast to other well-studied zeolite synthesis systems, decreasing the solubility of the silica source increased the extent of nucleation. We explain this observation in ter...

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Bibliographic Details
Published in:Microporous and mesoporous materials 1999-11, Vol.32 (1), p.119-129
Main Authors: Maesen, T.L.M., Gabrielov, A.G., van Ballegoy, C.M., Creyghton, E.J.
Format: Article
Language:English
Subjects:
Acidity
Catalysis
Catalysts: preparations and properties
Chemistry
Exact sciences and technology
General and physical chemistry
Layered silicate
Solubility
Synthesis
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
UTD-1
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Summary:We have explored various synthesis parameters that affect the crystal morphology and acid site density of UTD-1 zeolites. In contrast to other well-studied zeolite synthesis systems, decreasing the solubility of the silica source increased the extent of nucleation. We explain this observation in terms of the sparingly soluble, amorphous organo(metallo)silicate that forms at the start of the synthesis; this reduces the number of nutrients that are available for the nucleation and crystallization processes. We have established that the minimum framework silicon-to-aluminum ratio of UTD-1 (based on this synthesis) is 32.
ISSN:1387-1811
1873-3093
DOI:10.1016/S1387-1811(99)00098-0