Removal method of trace cobalt in nickel chloride solution

Abstract

The invention provides a removal method of trace cobalt in a nickel chloride solution. A solution obtained through 99.95% nickel board electrodissolution is adopted as the nickel chloride solution ora commercially available pure nickel chloride crystal is used for preparing the nickel chloride solution; the nickel chloride solution is subjected to extraction deep purification through an extraction agent Cyanex272 matched with solvent oil with the proper proportion, and cobalt, copper and iron are removed; after impurity removal, the pure nickel chloride solution is obtained, the content of cobalt is reduced to 0.001 g / L, meanwhile, the content of copper and iron is reduced to 0.0001 g / L, and the aim of removing three impurity elements in one working procedure is achieved. The method is applied to the high-purity nickel production, the purity of the obtained nickel plate product is 99.999%, the contents of the cobalt and the copper are both smaller than 1 ppm, the content of iron is smaller than 2 ppm, the process is simple and easy to operate, the product quality is high, stability is good, industrial production is easy, and treatment capacity is large; the nickel chloride solution obtained after impurity removal can meet the need of preparing high-purity nickel and other high-purity nickel products.

Description

technical field [0001] The invention belongs to the technical field of nonferrous metal smelting, and relates to a solution for preparing high-purity nickel metal, in particular to a method for removing trace amounts of cobalt in a nickel chloride solution. Background technique [0002] Nickel is a silver-white ferromagnetic metal, mainly used in the production of stainless steel, high-temperature alloy steel, high-performance special alloys and nickel-based spraying materials. High-purity nickel has extremely strong corrosion resistance, mechanical strength and excellent plasticity, and is widely used in large-scale integrated circuits and wiring materials, magnetic thin film materials and special packaging materials, rockets, radars, aircraft, tanks, ships, missiles, and spaceships It is also used in high-tech technologies such as machine manufacturing, ceramic pigments, permanent magnet materials, electronic remote control, nuclear industry, and remote control in the civi...

AI Technical Summary

Problems solved by technology

In this invention, the operation of adjusting the concentration of chlorine is relatively cumbersome, and cobalt in the solution cannot form anions completely, and the depth of cobalt removal by anion exchange resin is limited.

The acidity of 3mol / L hydrochloric acid solution is relatively high, which is easy to damage the equipment and pollute the environment

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