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Methylation of Sepiolite and Palygorskite with Diazomethane

Published online by Cambridge University Press:  02 April 2024

María C. Hermosín  and
Juan Cornejo
María C. Hermosín
Affiliation:
Centro de Edafología y Biología Aplicada del Cuarto, C.S.I.C., Apartado 1052 E.P., 41080 Sevilla, Spain
Juan Cornejo
Affiliation:
Centro de Edafología y Biología Aplicada del Cuarto, C.S.I.C., Apartado 1052 E.P., 41080 Sevilla, Spain
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Abstract

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The methylation of the fibrous clays, sepiolite and palygorskite, should be facilitated by their large content of surface silanol groups and the low acidity and inaccessibility of coordinated water molecules. Infrared spectroscopy showed that the reaction of diazomethane with these clays resulted in the methylation of their silanol surface groups. The grafting of CH3 groups on the surfaces of these clays produced a decrease in the surface area due primarily to the lowering of the microporosity.

Keywords

DiazomethaneMethylationPalygorskitePorositySepioliteSilanol
Type
Research Article
Information
Clays and Clay Minerals , Volume 34 , Issue 5 , October 1986 , pp. 591 - 596
Copyright
Copyright © 1986, The Clay Minerals Society

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