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Er(III) SOLVENT SUBLATION FROM DILUTE AQUEOUS SOLUTIONS
Abstract
The development of the small and poor deposits of rare-earth elements can be useful when creating effective, waste-free technology, requiring the solution of actual tasks on the modern stage of development of this kind of industry. The paper presents the possibility of the removal of the Er+3 from dilute aqueous solutions by adsorption-bubble method-Solvent Sublation (SS) using sodium dodecyl sulfate (NaDS). A theoretical and experimental investigation of SS in solutions of the nitrates of Er+3 with NaDS, used as a transport agent for the target component is determined. SS process kinetic laws are defined in the solutions containing Er+3 and surface-active substance. Getting dependencies of the distribution coefficient of the erbium (III) in the process SS of pH of the equilibrium aqueous phase will allow us to predict the direction of the process of REE extraction. Comparison of pH of extraction the pH of hydrate formation allows concluding, in what form the extracted Er+3 from solutions of hydrometallurgical processing of technogenic raw materials of the poor are removed.
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