| Autor: |
Zhdanov, S. P., Feoktistova, N. N., Kozlova, N. I., Piryutko, M. M. |
| Zdroj: |
Russian Chemical Bulletin; December 1985, Vol. 34 Issue: 12 p2467-2472, 6p |
| Abstrakt: |
1.The likelihood of obtaining silicalites 1 or 2, distinguished by the structural features of their framework, depends on the composition of the mixtures used in their preparation. The nature of the organic component has the greatest influence on the results of the crystallization. Complete absence of sodium ions from the mixture used in the synthesis of silicalite 2 is not obligatory.2.Under certain conditions of synthesis silicalites are obtained whose diffractograms seem to indicate a combination of the structural features of both silicalites 1 and 2 in the framework.3.Considerable differences in the thermal stability of silicalite samples are determined by the Na content. The thermal stability of silicalites, as of ZSM-5 zeolites, increases as the Na content of the crystals is reduced and can be appreciably increased by chemical modification, which leads to decationation of the crystals. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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