Abstract

Kulash K. Syrmanova^1,2, Moldir T. Suleimenova², Anastassiya Y. Kovaleva¹, Nurzhan Y. Botabayev¹ and Zhanat B. Kaldybekova¹

DOI : http://dx.doi.org/10.13005/ojc/330160

The article is devoted to the research of the acid activation process of mineral sorbent – vermiculite. This layered silicatescould  be applied for adsorptive separation and purification of chemical substances in petrochemical, gas, food, pharmaceutical and chemical industry. On the basis of  X-ray diffraction and adsorption it was shown that the adsorption properties, and other physical and chemical properties of the layered silicates with a rigid structure are defined by dispersion, which in turn depends on the vermiculitecrystal lattice structure. It was proved that the formation of amorphous silica during the  vermiculite treatment with hot sulfuric acid.  Vermiculite can be used to produce technical silica, because the activation by solution of 20-25% H2SO4occurs total destruction of its lattice and the formation of substantially pure silica.

adsorbent; vermiculite; acid activation; mineral sorbent; crystal lattice; porosity; sulfuric acid

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