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Silicalites and their thermal stability

  • Inorganic Chemistry
  • Published:
Bulletin of the Academy of Sciences of the USSR, Division of chemical science Aims and scope

Summary

  1. 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. 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. 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.

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Literature cited

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Authors and Affiliations

  1. I. V. Grebenshchikov Institute of the Chemistry of Silicates, Academy of Sciences of the USSR, Lenigrad

    S. P. Zhdanov, N. N. Feoktistova, N. I. Kozlova & M. M. Piryutko

Authors
  1. S. P. Zhdanov
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  2. N. N. Feoktistova
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  3. N. I. Kozlova
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  4. M. M. Piryutko
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Additional information

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2667–2673, December, 1985.

The authors would like to express their thanks to I. A. Belitskii and Yu. S. Pisarevskii for their collaboration in obtaining the scanning electron micrographs.

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Zhdanov, S.P., Feoktistova, N.N., Kozlova, N.I. et al. Silicalites and their thermal stability. Russ Chem Bull 34, 2467–2472 (1985). https://doi.org/10.1007/BF00953007

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  • DOI: https://doi.org/10.1007/BF00953007

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