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Purification method for nickel electric accumulated liquid for manufacturing high-purity nickel plate

A technology of electrowinning and nickel plates, applied in the field of purification of nickel electrowinning solution for preparing high-purity nickel plates, can solve the problems that cobalt cannot form anions, environmental pollution, high acidity, etc., achieve good impurity removal effect, continuous and stable process, The effect of simple process

Inactive Publication Date: 2016-02-24
LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Purification method for nickel electric accumulated liquid for manufacturing high-purity nickel plate
  • Purification method for nickel electric accumulated liquid for manufacturing high-purity nickel plate
  • Purification method for nickel electric accumulated liquid for manufacturing high-purity nickel plate

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Experimental program
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Effect test

Embodiment 1

[0024] The solution after nickel plate electrolysis is used for extraction and impurity removal, the extraction agent Cyanex272, the organic phase concentration is 2-10%, solvent oil, the saponification rate is 30-50%, the extraction ratio is 1:1, and the raffinate is degreased after electrolysis It can be reused after loaded with organic stripping, pickling and saponification. The results of the three parallel experiments are shown in Table 1.

[0025] Table 1 Comparison of solution indicators before and after nickel chloride solution removal

[0026]

[0027]

[0028] Electrowinning the extracted solution, the experimental conditions are: temperature 50-70°C, current density 30-100A / m 2 , the nickel concentration is 50-220g / L, and the nickel content in the obtained nickel plate is 99.9997%. The experimental results are shown in Table 3.

Embodiment 2

[0030] The solution after dissolving nickel chloride crystals was taken for extraction experiments. The extraction agent was Cyanex272, the concentration of the organic phase was 2-10%, the solvent oil was 90-98%, the saponification rate was 30-50%, and the extraction ratio was 1:1. The results are shown in Table 2.

[0031] Table 2 Comparison of solution indicators before and after nickel chloride solution removal

[0032]

[0033] The above-mentioned purified nickel chloride solution was subjected to electrowinning under the same experimental conditions as above, and the nickel content in the obtained nickel plate was 99.999724%. The experimental results are shown in Table 4.

[0034] It can be seen from the above that, through the method of the present invention, the solution with a purity of 99.95% nickel plate electrolysis or nickel chloride crystal dissolution can effectively remove impurities cobalt, copper, and iron after being extracted by Cyanex272, and realize t...

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Abstract

The invention provides a purification method for nickel electric accumulated liquid for manufacturing a high-purity nickel plate, relates to high-purity nickel plate manufacturing, in particular to a purification method for a nickel solution for manufacturing the high-purity nickel plate. The method is characterized in that the nickel electric accumulated liquid for manufacturing the high-purity nickel plate is a nickel chloride solution, and an organic solvent extraction method is adopted for purifying the nickel chloride solution for manufacturing the high-purity nickel plate till the content ratio of nickel and cobalt in the solution is larger than 400000. The sample purity of the a high-purity nickel plate produced through the electric accumulated liquid purified through the method is 99.999%, the content of the cobalt and the content of the nickel are both smaller than 1 ppm, and the content of iron is smaller than 2 ppm. By the adoption of the method, the process is simple and feasible, the product quality is high, and stability is good; and the nickel chloride solution with impurities removed meets the requirements for manufacturing high-purity nickel and producing other high-purity nickel products.

Description

technical field [0001] The invention discloses a method for purifying nickel electrolytic solution for preparing high-purity nickel plates, and relates to a method for purifying nickel solution for preparing high-purity nickel plates, especially for preparing high-purity nickel plates. 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, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B23/06C25C1/08
CPCY02P10/20
Inventor 常全忠柴艮风王甲琴常雪洁李兰兰王国超王红忠白延利黄琳琳
Owner LANZHOU JINCHUAN NEW MATERIAL SCI & TECH
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