Abstract
The changes in the surface properties and porous structure of montmorillonite are investigated upon the substitution of tetramethylammonium or pyridinium cations for exchange Na+ cations. It is established that preliminary thermal treatment in vacuum substantially affects the adsorption properties of tetramethylammonium and pyridinium montmorillonites in relation to toluene. The dependences of the heats of adsorption and desorption on the amount of adsorbed substance are determined in a wide temperature range using the results of measuring the isosters of toluene adsorption and desorption by dehydrated organomontmorillonites.
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