Separation and recovery method for leaching solutions of waste battery material containing nickel, cobalt and manganese

Abstract

The invention provides a separation and recovery method for leaching solutions of waste battery material containing nickel, cobalt and manganese. The method comprises the steps of adopting trialkyl hydroxamic acid for extracting solutions to be treated for obtaining organic phases 1 and aqueous phases 1, wherein the nickel and the cobalt are extracted into the organic phases 1, and manganese ions and lithium ions are left in the aqueous phases 1; adopting sulfuric acid or hydrochloric acid for carrying out reverse extraction on the organic phases 1 for obtaining organic phases 2 and aqueous phases 2, wherein the nickel and the cobalt are reversely extracted into the aqueous phases 2; adopting a second extraction agent for extracting the aqueous phases 2 for obtaining organic phases 4 and aqueous phases 4, wherein the cobalt is extracted into the organic phases 4 and the nickel is left in the aqueous phases 4 for forming nickel solutions; adopting the sulfuric acid or hydrochloric acid for carrying out reverse extraction on the organic phases 4 for obtaining cobalt solutions; adopting a third extraction agent for extracting the aqueous phases 1 for obtaining organic phases 5 and aqueous phases 5 after phase splitting, wherein the manganese is extracted into the organic phases 5 and the lithium ions are left in the aqueous phases 5; adopting the sulfuric acid or hydrochloric acid for carrying out reverse extraction on the organic phases 5 for obtaining manganese solutions.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting technology hydrometallurgy, and in particular relates to a method for separating and recovering leachate of waste battery materials containing nickel, cobalt and manganese. Background technique [0002] Lithium-ion batteries have the advantages of high voltage, good cycle performance, high energy density, small self-discharge, and no memory effect. They have been widely used in the electronics and wireless communication industries, and are also the preferred power source for future light-duty high-capacity batteries for electric vehicles. As all kinds of electronic products have been gradually popularized and maintained a rapid replacement speed, the demand for lithium-ion batteries is increasing day by day, and the amount of waste lithium-ion batteries and lithium-ion battery production waste is also increasing day by day. These wastes containing valuable metals belong to Recycl...

AI Technical Summary

Problems solved by technology

The existing nickel-cobalt lithium manganate waste battery metal recovery process only uses D2EHPA to extract Ni, Co, Mn from impurity ions, or D2EHPA to extract Mn from Ni, Co, but the separation coefficient is not high, and impurity ions Ca and Mg are not easy to remove

It has been reported in the literature that chemical precipitation (potassium permanganate precipitation, alkaline precipitation, sulfide precipitation) has a certain separation effect, but the content of other valuable metals is relatively high, and there is a certain degree of loss caused by precipitation and entrainment.

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