Process for preparing high purity nickel

A high-purity, electrolytic nickel technology, applied to the improvement of process efficiency, photography technology, instruments, etc., can solve the problems of easy pollution, high production cost, and high impurity content of high-purity nickel, so as to reduce costs, prevent process pollution, and impurity content low effect

Active Publication Date: 2005-03-02
JINCHUAN GROUP LIMITED
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

[0006] In the existing production method of high-purity nickel, in order to solve the problem of high acidity in electrolysis stock solution, the method of boiling acid removal and neutralization to reduce acid is adopted, resulting in high production cost and easy pollution; the deep purification of the solution is not ideal
Due to the use of soluble anodes, mutual contamination between the electrolytic cathode and the anolyte is prone to occur, resulting in high impurity content in high-purity nickel

Method used

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  • Process for preparing high purity nickel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Using 3N electrolytic nickel to prepare NiCl by electrolysis in hydrochloric acid system 2 solution with a current density of 100A / m 2 , electrodissolved into the solution of H + Use 30A / m at the end of liquid production with a concentration of 1g / l 2 The current density of the liquid is produced, so that the pH of the solution is 3; the solution Cl - The concentration reaches 6mol / L, and the content of impurity elements in the solution is shown in the table:

[0031] Table 1-Content of impurity elements in the original solution Unit: g / l

[0032] No. Name Co Cu Fe Pb Zn

[0033] 1 Original solution 0.009 0.002 0.002 0.001 0.001

[0034] An anionic extractant with volume percentage of 25% tertiary amine, 45% butyl fat, and 30% sulfonated kerosene is used. After the extractant is washed with high-purity water, it is saturated with 4mol / l high-purity hydrochloric acid. Ratio 1:2, after 10 minutes of extraction balance, back-extract with pure water; after the solutio...

Embodiment 2

[0041] Using 3N electrolytic nickel to prepare NiCl by electrolysis in hydrochloric acid system 2 solution with a current density of 150A / m 2 , electrodissolved into the solution of H + Use 50A / m at the end of the fluid-making stage with a concentration of 1.5g / l 2 The current density of the liquid is produced, so that the pH of the solution is 2; the solution Cl - The concentration reaches 6mol / L, and the content of impurity elements in the solution is shown in Table 5:

[0042] Table 5-Content of impurity elements in the original solution Unit: g / l

[0043] No. Name Co Cu Fe Pb Zn

[0044] 1 Original solution 0.008 0.003 0.001 0.001 0.001

[0045] An anionic extractant with volume percentage of 40% tertiary amine, 20% butyl fat, and 40% sulfonated kerosene is used. After the extractant is washed with high-purity water, it is saturated with 4mol / l high-purity hydrochloric acid. Ratio 1:2, after 10 minutes of extraction balance, back-extract with pure water; afte...

Embodiment 3

[0052] Other conditions are the same as in Example 2, and the volume percentage of anion extractant is 20% of tertiary amine, 45% of butyl fat, and 35% of sulfonated kerosene.

[0053] The solution after ion exchange in Example 2 was used, and the components of the solution after exchange are shown in Table 8.

[0054] serial number

name

co

Cu

Fe

Pb

Zn

1

After ion exchange purification

＜0.0004

0.0001

＜0.0004

＜0.0001

0.0001

[0055] Using this NiCl 2 Solution, insoluble anode electrowinning, electrowinning technical conditions: current density is 200A / m 2 ,, NiCl 2 The pH value of the solution is 2, and the electrodeposition temperature is 60°C. 5N high-purity nickel was prepared by insoluble anode electrowinning. High-purity nickel contains less than 0.1ppm of alkali metal elements, less than 1ppm of Fe, Co, and Cr, less than 0.1ppb of U and Th, less than 60ppm of C, and less than 100ppm of ...

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Abstract

The high purity nickel preparing electrodeposition process features the successive technological steps of: adopting hydrochloric acid system with 3N electrolytic aluminum as anode for electric dissolving preparation of pH 1-3 NiCl2 solution; three-stage countercurrent extraction of the electric dissolving solution with anionic extractant; deoiling the counter extracted solution and deeply purification through ion exchange with anionic exchange resin; and final electrodeposition in electrolytic bath to obtain high purity aluminum, with the introduced solution amount after ion exchange purification being equal to pumped out post-electrodeposition liquid. Glow discharge mass spectrum-GDMS analysis shows that the preparation high purity Ni reaches 5N standard, and the preparation process has low cost and no environmental pollution.

Description

technical field [0001] A method for preparing high-purity nickel, which relates to a method for preparing high-purity nickel by using 3N electrolytic nickel as a raw material and using hydrochloric acid solution system electrowinning Background technique [0002] The further development of high-tech requires sufficient special materials. It has been found that a variety of metals can be used as high-tech strategic materials and they are required to be purified to very high purity. The preparation, properties, and applications of high-purity and ultra-high-purity metals are new, dynamic, and growing fields in modern materials science and engineering. High-purity metals above 5N are widely used in the production of semiconductor components and VLSI components. The production of electronic components and printed circuit boards requires more than 20 kinds of high-purity metals and their compounds, such as high-purity gallium, indium, arsenic, antimony, cadmium, lead, tin, tellu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/08
CPCC25C1/08C22B3/42C22B23/06C22B3/0005Y02P10/20
Inventor 李永军武浚郑文刚陈真华阎忠强马永峰祁世清曹文英
Owner JINCHUAN GROUP LIMITED
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