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Method for separating and purifying cobalt solution by extraction chromatography

A chromatographic separation and cobalt solution technology, applied in the direction of improving process efficiency, can solve problems such as difficulty in preparing high-purity cobalt solution, difficulty in realizing deep separation of cobalt-nickel, cobalt-copper, etc., to reduce irritating odor and reduce investment. , the effect of high product quality

Inactive Publication Date: 2009-06-10
有研资源环境技术研究院(北京)有限公司
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Problems solved by technology

However, these methods are difficult to prepare high-purity cobalt solutions with a nickel content of less than 10ppm, and it is difficult to achieve deep separation of cobalt-nickel and cobalt-copper even with multi-stage separation

Method used

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  • Method for separating and purifying cobalt solution by extraction chromatography

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] like figure 1 As shown, take 10 kg of water-containing macroporous adsorption resin (particle size between 70-150 mesh) into the aqueous solution, add 2 kg of P507 (2-ethylhexyl phosphate-2-ethylhexyl ester) extractant , carried out adsorption treatment under the condition of stirring, prepared 34% P507 extraction resin after filtration, packed into a plexiglass column with a diameter of 80 mm and a length of 850 mm, and assembled into a P507 extraction resin column.

[0034] Add 5 liters of cobalt chloride feed liquid, wherein the cobalt concentration is 60 g / L, the pH value of the feed liquid is 4.5, and the P507 extraction resin column is rinsed until the pH value of the eluate is 3.

[0035] Then with cobalt-containing 5 grams per liter, the cobalt chloride solution that the pH value is 2 rinses the P507 extraction resin that loads cobalt, when the eluate volume is 4 times of the chromatographic column void volume, use acidity instead as 2 Mole / L hydrochloric acid ...

Embodiment 2

[0039] The test operation method is the same as in Example 1. A 50% TBP extraction resin was prepared. Add 5 liters of cobalt sulfate feed solution, wherein the cobalt concentration is 80 g / L, the pH value of the feed solution is 4, and the P507 extraction resin column is rinsed until the pH value of the eluate is 3.

[0040] Then use the cobalt sulfate solution containing 8 g / L of cobalt and the pH value to be 2 to rinse the loaded P507 extraction resin. The sulfuric acid solution quickly elutes the cobalt ions adsorbed by the chromatography column.

[0041] Finally, regenerate and rinse the P507 extraction resin column. The regeneration solution is 6 mol / L hydrochloric acid solution. When the volume of the eluate is 4 times the void volume of the chromatographic column, use deionized water to rinse. It ends when the pH value of the leachate is 5.

[0042]The collected cobalt sulfate solution is concentrated to 90 g / L, and electrolytic deposition is carried out. The electr...

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Abstract

The invention relates to a method for purifying a cobalt solution through extraction chromatographic separation, which comprises the following steps: firstly, injecting P507 extraction resin into an extraction chromatographic column; secondly, using the cobalt solution to elute the P507 extraction resin column for feeding; thirdly, eluting the P507 extraction resin column for extracting cobalt; fourthly, using an acid eluent to wash the cobalt in the P507 extraction resin column into an aqueous phase of the eluent; and fifthly, using a chromatographic resin regeneration solution for elution and regeneration, wherein the temperature of all the operations is between 10 and 40 DEG C. By utilization of the method for recovering the cobalt, the recovery rate of the cobalt is more than 95 percent; the product quality is high and stable; and the purity of final products, namely the metallic cobalt, reaches more than 4N.

Description

technical field [0001] The invention relates to a method for extracting and purifying cobalt solution through chromatographic separation. Background technique [0002] High-purity cobalt with a purity greater than 4N is mainly used for ultra-large and large-scale integrated circuits, microelectronic equipment, X-ray tube cathodes, magnetic recording media, dynamic memory, and coating targets for semiconductor materials, and may become a conductor material and aluminum for wires. It has a very broad application prospect in the fields of precision instruments and electronic components, as well as magnetic materials. At present, most of the producers of high-purity cobalt in the world are companies from Japan, the United States and other countries, and my country's production in this field has not been reported. [0003] The key to preparing high-purity cobalt is the deep purification of the cobalt solution, especially to make the content of nickel in the cobalt solution less ...

Claims

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Application Information

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IPC IPC(8): C22B3/20C22B3/26C22B3/42C22B23/00
CPCY02P10/20
Inventor 张力陈松郎书玲王力军
Owner 有研资源环境技术研究院(北京)有限公司
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