Dimethylchlorosilanaerosyl Impregnated with a Acetone or Ethanol - a Multifunctional Sorbent for the Separation of Microquantities of Al (III), Ga (III), In (III) A.N. Chebotarev*, E.M. Rakhlytskaya, T.M. Shcherbakova, D.V. Snigur
	* Corresponding authors Odessa I.I. Mechnikov National University, Dvoryanskaya str., 2, 65082, Odessa, Ukraine; *e-mail: alexch@ukr.net
	Methods Objects Chem. Anal., 2020, 15(3), p. 117-124 https://doi.org/10.17721/moca.2020.117-124
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Abstract

A multifunctional sorbent for the separation of microquantities of elements-analogues of the aluminum subgroup was obtained by impregnation of the dimethylchlorosilanaerosyl (DMCSA) surface with a polar organic solvent (POS). The surface identification of the organized DMCSA - POS system was performed via diffuse reflection spectroscopy. The results of the study of Al (III), Ga (III), In (III) sorption using an organized system DMCSA - POS depending on the medium acidity and the nature of POS (ethanol or acetone) showed that the quantitative and selective removal of the studied elements corresponds to the formation of the neutral hydroxoforms and is due to kinetic and thermodynamic differences in the ability of Al (III), Ga (III), In (III) to hydrolysis. A participation in adsorption-extraction processes hydrophobically attached to the methyl groups of DMCSA layer POS also takes place. A method of stepwise separation of Al (III), Ga (III), In (III) from their three- and multicomponent mixtures is proposed. At the same initial concentrations of elements, the values of the separation coefficients of pairs Ga (III) - In (III) ≈ 1450 and In (III) - Al (III) ≈ 450 were calculated.

Keywords: separation, sorption, aluminum, gallium, indium, dimethylchlorosilaneaerosyl

Article language: Ukr