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Fixation de toluène dans une montmorillonite-Cu(II)

Published online by Cambridge University Press:  09 July 2018

D. Saehr ,
D. Walter  and
R. Wey
D. Saehr
Affiliation:
Laboratoire de Matériaux Minéraux, Ecole Nationale Supérieure de Chimie, 3 rue Alfred 68093 Mulhouse Cedex, France
D. Walter
Affiliation:
Laboratoire de Matériaux Minéraux, Ecole Nationale Supérieure de Chimie, 3 rue Alfred 68093 Mulhouse Cedex, France
R. Wey
Affiliation:
Laboratoire de Matériaux Minéraux, Ecole Nationale Supérieure de Chimie, 3 rue Alfred 68093 Mulhouse Cedex, France
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Résumé

La fixation du toluène et sa polymérisation dans les espaces interfoliaires d'une montmorillonite-Cu(II) au cours de cycles de déshydratation, adsorption, désorption de l'excès de réactif et réhydratation, ont été étudiées. Elles ont été suivies au moyen de diverses méthodes d'analyse (thermogravimétrie, radiocristallographie et spectrophotométrie d'absorption infrarouge). Les résultats rappellent ceux obtenus lors de l'étude du système montmorillonite-Cu(II)-benzène. Ainsi, la fixation du toluène s'effectue selon deux réactions, correspondant l'une à l'adsorption d'une molécule de toluène, l-autre à celle de trois molécules de toluène par ion Cu2+. Toutefois, l'affinité du toluène pour la montmorillonite est supérieure à celle du benzène.

Abstract

Abstract

The fixation of toluene and its polymerization in the interlayer spaces of a Cu-montmorillonite during cycles including dehydration of the carrier, adsorption of the reagent and desorption of the excess substance, followed by rehydration of the carrier, were investigated. Various analytical methods (thermogravimetry, X-ray diffraction and IR absorption spectroscopy) were used. The results are analogous to those found for the montmorillonite-Cu(II)-benzene system. Toluene fixation thus involves two reactions, one corresponding to the uptake of one toluene molecule, and the other to the uptake of three toluene molecules per Cu2+ ion. Nevertheless, the affinity of toluene for montmorillonite exceeds that of benzene.

Type
Research Article
Information
Clay Minerals , Volume 26 , Issue 1 , March 1991 , pp. 43 - 48
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1991

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