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Hydrothermal aging of synthetic alumino-silicate gels

Published online by Cambridge University Press:  09 July 2018

C. R. De Kimpe*
Affiliation:
Laboratoire de Physico-Chimie Minérale, Institut des Sciences de la Terre, 42 de Croylaan, Heverlee-Louvain, Belgium

Abstract

Amorphous alumino-silicates of different compositions were aged at 175° C under acid and basic conditions. At high pH, crystallization of two zeolites, phillipsite and chabazite, was recorded. Under acid or neutral conditions, a demixing into boehmite and a more stable alumino-silicic gel has been observed.

These results are discussed in relation to the affinity of silica for alumina.

Type
Research Article
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1967

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