Method for preparing high-pure-cobalt solution through stirring and extraction

Abstract

The invention relates to a method for preparing a high-pure-cobalt solution through stirring and extraction, and belongs to the technical field of preparing a metal material. The method comprises: preparing a cobalt solution in a high-level extraction tank; adding sulfonated kerosene, a P507 extractant, and sodium hydroxide in a low-level extraction tank, performing stirring for saponification, and pumping the obtained product into the high-level extraction tank for stirring and extraction to enable cobalt in the cobalt solution extracted into an organic phase; adding hydrochloric acid to wash the loading organic phase while performing stirring, and performing back extraction to prepared a cobalt-rich liquid; adding a macroporous adsorption resin for deep purification, and performing condensation and electrolytic deposition; and performing vacuum melting of electrolytic deposited cobalt to obtain a high-pure cobalt ingot. The purity of the high-pure cobalt ingot is analyzed by glow discharge mass spectrometry, and the purity of more than 70 kinds of elements in the cobalt ingot is more than 99.999%. According to the invention, high selectivity of liquid-liquid extraction and properties, such as turbulence and shear force, of stirring are combined to enhance the reaction process and to improve the purification capability of the cobalt solution. The method is simple, and is easy to operate and low in cost. Processes in the method are relatively independent, so that the method is high in flexibility. Chemical materials are less in consumption, and the equipment is high in productivity, so that the method benefits scale production.

Description

technical field [0001] The invention relates to a method for preparing a high-purity cobalt solution by stirring extraction, in particular to a solvent extraction process of a cobalt salt solution under stirring, and belongs to the technical field of metal material preparation. Background technique [0002] As an important high-purity metal material, high-purity cobalt has been widely used in optoelectronic devices, magnetic sensors, integrated circuits, and targets for advanced electronic components. At present, the preparation of high-purity cobalt mostly adopts a combination of wet and fire methods such as extraction, ion exchange, membrane separation, electrolytic refining, vacuum sintering, and vacuum smelting. Among them, ion exchange and extraction can remove most of the metal impurities in the cobalt solution, and deep purification of the solution is the key process for the preparation of high-purity cobalt. [0003] Selective Adsorption and Separation of Cu by Anio...

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Problems solved by technology

[0005] Extraction chromatography and ion exchange have a good effect on the separation of elements with similar properties, but usually the column is filled with resin to extract and remove impurities, such as the length of the column, the particle size of the support, the porosity, etc. factors, and the pH value in the column is difficult to control, resulting in low efficiency, relatively low column extraction capacity, easy loss of extractant, and relatively short service life, which affect its large-scale industrial application.

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