Process for separating nickel and magnesium and use thereof

Abstract

The application provides a method for separating nickel and magnesium and application thereof, and the separation method comprises the following steps: (1) configuring high-purity extractant and diluent into an extraction organic phase with a certain volume fraction, and then performing saponification reaction on the extraction organic phase with an alkaline compound to obtain a saponified organic phase; the extractant comprises a specific carboxylic acid compound BC197; (2) mixing, extracting and layering a nickel-magnesium feed liquid with the saponified organic phase obtained in step (1) to obtain a loaded organic phase and a raffinate aqueous phase; (3) performing back extraction on the loaded organic phase obtained in step (2) with a back extraction agent to obtain a metal ion enrichment solution and a regenerated organic phase; the whole separation process is simple in operation, low in acid consumption and friendly to the environment; the separation method has good separation effect on nickel and magnesium, is high in separation coefficient, low in back extraction acidity, and is low in water solubility of the used extraction reagent, stable, and recyclable after regeneration, so that the separation cost is reduced, and the method is suitable for large-scale application.

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