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Pillared Clays Prepared from the Reaction of Chromium Acetate with Montmorillonite

Published online by Cambridge University Press:  28 February 2024

Antonio Jimenez-Lopez ,
Jose Maza-Rodriguez ,
Pascual Olivera-Pastor ,
Pedro Maireles-Torres  and
Enrique Rodriguez-Castellon
Antonio Jimenez-Lopez
Affiliation:
Departamento de Química Inorgánica Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, Apartado 59, 29071, Málaga, España
Jose Maza-Rodriguez
Affiliation:
Departamento de Química Inorgánica Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, Apartado 59, 29071, Málaga, España
Pascual Olivera-Pastor
Affiliation:
Departamento de Química Inorgánica Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, Apartado 59, 29071, Málaga, España
Pedro Maireles-Torres
Affiliation:
Departamento de Química Inorgánica Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, Apartado 59, 29071, Málaga, España
Enrique Rodriguez-Castellon
Affiliation:
Departamento de Química Inorgánica Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, Apartado 59, 29071, Málaga, España
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Abstract

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Refluxing chromium (III) acetate with a Na+-montmorillonite suspension gives rise to the intercalation of linear Cr(III) polyhydroxo-acetate oligomers. Thermally stable chromia pillared mont-morillonite materials are obtained upon calcination under ammonia up to 625°C, and basal expansions up to 6 Å are maintained. The porous materials retain high surface areas (366–464 m2 g−1), a micropore volume of 0.1 cm3 g−1 and narrow pore size distributions centered between 7.5 and 12 Å. The most thermally stable materials in air were those prepared under ammonia at 625°C, containing NH4+ as the exchangeable ion.

Keywords

ChromiaMontmorillonitePillaring
Type
Research Article
Information
Clays and Clay Minerals , Volume 41 , Issue 3 , June 1993 , pp. 328 - 334
Copyright
Copyright © 1993, The Clay Minerals Society

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