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Iron Influence in the Aluminosilicate Zeolites Synthesis

Published online by Cambridge University Press:  28 February 2024

E. I. Basaldella ,
R. M. Torres Sánchez  and
J. C. Tara
E. I. Basaldella
Affiliation:
Centro de Investigaciones y Desarrollo en Procesos Catalíticos (CINDECA), La Plata, Argentina
R. M. Torres Sánchez
Affiliation:
Centro de Tecnología de Recursos Minerales y Cerámica (CETMIC) CC49, 1897 M.B. Gonnet, Argentina
J. C. Tara
Affiliation:
Centro de Investigaciones y Desarrollo en Procesos Catalíticos (CINDECA), La Plata, Argentina
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Abstract

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The level of Fe impurities in 2 well-crystallized kaolinites was modified (by addition or chemical removal treatment) to analyze the Fe influence in the aluminosilicate zeolite synthesis.

The original and modified clays were heat-treated in order to change their reactivity for zeolite A synthesis, and their thermal transformations were studied by X-ray diffraction (XRD), determination of point of zero charge (PZC) and infrared (IR) techniques. It was established that many structural changes took place, regardless of the Fe clay content. Furthermore, the presence of Fe species in alkaline solution or in the solid phase did not seem to greatly influence the zeolite crystallization, because only small differences in the conversion values among samples with different Fe contents were registered. The crystallization process seemed to be related mainly to AI coordination changes produced by the thermal and Fe removal treatments used.

Keywords

Al CoordinationIron InfluenceKaolinZeolite Synthesis
Type
Research Article
Information
Clays and Clay Minerals , Volume 46 , Issue 5 , October 1998 , pp. 481 - 486
Copyright
Copyright © 1998, The Clay Minerals Society

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