INTERLAMELLAR LIQUID SORPTION ON HYDROPHOBIC SILICATES.

I. Dékány, F. Szanto, Armin Weiss, G. Lagaly

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

A particular advantage of adsorption measurements on layer silicates is that the adsorption between the silicate layers can be followed by X-ray measurements. When the external and internal surface of the silicate montmorillonite is modified by increasing amounts of hexadecylpyridinium cations, the surface character changes from hydrophilicity to hydrophobicity. The changes are evaluated from the excess adsorption isotherms for methanol-benzene mixtures. The volume V**s of the adsorption phase derived from the isotherms is compared with the free interlayer volume V//f from X-ray measurements. On sodium montmorillonite methanol is preferentially adsorbed and the volume increase observed by X-ray measurements coincides with V**s. If the sodium cations are progressively displaced by hexadecylpyridinium ions the azeotropic point of the type IV isotherms is shifted to lower mole fractions of methanol.

Original languageEnglish
Pages (from-to)62-67
Number of pages6
JournalBerichte der Bunsengesellschaft/Physical Chemistry Chemical Physics
Volume89
Issue number1
Publication statusPublished - Jan 1985

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Silicates
Sorption
Cetylpyridinium
Bentonite
Methanol
Liquids
Clay minerals
Adsorption
X rays
Isotherms
Cations
Positive ions
Sodium
Free volume
Hydrophilicity
Hydrophobicity
Benzene
Adsorption isotherms
Ions

ASJC Scopus subject areas

  • Chemical Engineering(all)

Cite this

INTERLAMELLAR LIQUID SORPTION ON HYDROPHOBIC SILICATES. / Dékány, I.; Szanto, F.; Weiss, Armin; Lagaly, G.

In: Berichte der Bunsengesellschaft/Physical Chemistry Chemical Physics, Vol. 89, No. 1, 01.1985, p. 62-67.

Research output: Contribution to journalArticle

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