Abstract

Kelbaliyev Gudrat Isphandiyar, Shekiliyev Fikret Ibrahim and Malikova Irada Hasan^*

DOI : http://dx.doi.org/10.13005/ojc/400516

ABSTRACT. The possibilities of extracting the separation of transition metals with similar physicochemical properties from ammoniasolutions by liquid extraction using 2-hydroxy-5-alkyl (C8-C9) benzylethylenediaminehavebeenstudied. It was found that the extraction of iron and zinc is strongly reduced in the presence of carbonate or sulfate ions in the system. It is shown that the turbulent boundary layer model describes the mass transfer between a fixed solvent droplet boundary and a turbulent fluid flow containing metal ions with a complex profile of the turbulent diffusion coefficient. According to this model, the substance concentration is constant in the flow, in the turbulent sublayer it gradually decreases when approaching the buffer sublayer, where the turbulence gradually fades turning into a laminar regime. The process of extraction of metals 2-hydroxy-5-alkyl (С8–С9) benzylethylenediamine in hexane from ammonia solutions is characterized by unsteady behavior, and therefore, mass transfer models significantly differ depending on the nature of the hydrodynamic flow around the particle.

Ammonium Salts; Kinetics; Ionic Composition; Kinetics; Liquid-Phase Extraction; Laminar Flow; Metal Separation; Re-Extraction; Turbulent Diffusion

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