Regulation of sorption processes in natural nanoporous aluminosilicates. 2. Determination of the ratio between active sites

Abstract

The ratio of acidic and basic sites on natural aluminosilicates (clinoptilolite, nontronite, and glauconite) and their acidic and basic forms were determined based on the catalytic activity of the samples in the reaction of methylbutynol (MBOH) conversion. Conversion of MBOH took place most fully on the natural zeolite (clinoptilolite). The reagent modification of clinoptilolite(treatment with sulfuric acid and alkali) reduced the ratio of acidic and basic sites. Conversion of MBOH on clay minerals increased in the acid-modified samples and decreased upon the alkali treatment, which corresponds to the change in the ratio of acidic and basic sites in both nontronite and glauconite, but to a greater extent in spherulite-like clay mineral glauconite.