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Application of amidogen-containing acid phosphine extraction agent to extraction and separation of cobalt and nickel, and method

A technology of amino acid and extractant, applied in the direction of improving process efficiency, etc., can solve the problems of difficult separation of sulfate solution, large loss of extractant, small separation coefficient, etc., achieve good separation effect, reduce separation cost, and have stable properties Effect

Active Publication Date: 2018-12-28
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the separation coefficient of P507 for cobalt and nickel is small, and it is difficult to separate the sulfate solution with high nickel and low cobalt, and P507 has a certain extraction of calcium and magnesium, and calcium sulfate precipitation will occur during back extraction, which will affect normal operation; Although Cyanex272 is better than P507 in separating cobalt and can reduce the number of extraction stages, it is very expensive. The import price is about 400,000 / ton, and the loss of extractant is large during the separation of cobalt and nickel.

Method used

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  • Application of amidogen-containing acid phosphine extraction agent to extraction and separation of cobalt and nickel, and method
  • Application of amidogen-containing acid phosphine extraction agent to extraction and separation of cobalt and nickel, and method
  • Application of amidogen-containing acid phosphine extraction agent to extraction and separation of cobalt and nickel, and method

Examples

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Effect test

Embodiment 1

[0092] Preparation of the organic phase: Mix 3L 1-(2-ethylhexylamino)methylphosphonic acid mono(2-ethylhexyl)ester with 7L sulfonated kerosene, then add sodium hydroxide solid to saponify at a degree of saponification of 40% , to obtain the organic phase.

[0093] The feed liquid is a mixed solution of cobalt and nickel chloride, wherein the concentration of cobalt is 0.2 mol / L, and the concentration of nickel is 0.2 mol / L; the pH of the feed liquid is 5.0.

[0094] The washing solution is 0.2mol / L hydrochloric acid solution.

[0095] The stripping agent is 1.0mol / L hydrochloric acid solution.

[0096] The organic phase and the feed liquid are mixed at a ratio of 1:1 by volume to perform 10-stage countercurrent extraction to obtain a nickel-containing extract and a cobalt-containing raffinate aqueous phase. Then, the nickel-containing extraction solution and the washing solution are mixed at a volume ratio of 10:1 for two-stage countercurrent washing, and the resulting washi...

Embodiment 2

[0104] Mix 3L 1-(2-methylhexylamino)methylphosphonic acid mono(2-ethylhexyl)ester, 1L methylheptanol and 6L aviation kerosene, then add NaOH for saponification according to the degree of saponification of 30%, to obtain organic Mutually.

[0105] The feed liquid is a mixed solution of cobalt and nickel sulfate, wherein the concentration of cobalt is 0.5 mol / L, and the concentration of nickel is 0.1 mol / L; the pH of the feed liquid is 5.5.

[0106] The detergent is water.

[0107] Stripping agent is [H 2 SO 4 ]=1.0mol / L sulfuric acid solution.

[0108] The organic phase and the feed liquid are mixed at a ratio of 1:2 by volume to perform 20-stage countercurrent extraction to obtain a nickel-containing extract and a cobalt-containing raffinate aqueous phase. Then, the nickel-containing extract and washing liquid are mixed at a volume ratio of 6:1 for 10-stage countercurrent washing, and the resulting washing liquid is circulated back to the extraction section for the extract...

Embodiment 3

[0116] Mix 3L of 1-(2-propylpentylamino)methylphosphonic acid mono(2-ethylhexyl)ester with 7L of aviation kerosene, then add sodium hydroxide for saponification according to the degree of saponification of 25%, to obtain an organic phase.

[0117] The feed liquid is a mixed solution of cobalt-nickel nitrate, wherein the concentration of cobalt is 0.05 mol / L, and the concentration of nickel is 0.5 mol / L; the pH of the feed liquid is 4.8.

[0118] The stripping agent is 0.5mol / L nitric acid solution.

[0119] The organic phase was mixed with the volume ratio of solid to liquid at a ratio of 3:1 to perform one-stage countercurrent extraction to obtain a nickel-containing extract and a cobalt-containing raffinate aqueous phase. Then, the nickel-containing extract and the stripping agent are directly subjected to 5-stage countercurrent stripping at a volume ratio of 20:1 to obtain a nickel-containing aqueous solution.

[0120] Elemental analysis was carried out on the obtained nic...

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Abstract

The invention relates to application of an amidogen-containing acid phosphine extraction agent (please see the descriptions for the following general formula I) to extraction and separation of cobaltand nickel, and a method, wherein R1 is selected from C1-C12 alkyl groups, and R2 is selected from C1-C14 alkyl groups. The method comprises the step that the amidogen-containing acid phosphine extraction agent with the general formula I is used for extracting and separating the nickel from a feed liquid containing the cobalt and the nickel. The method can extract the nickel preferentially, then the nickel and the cobalt are separated, and thus the method has the remarkable advantage in low-nickel and high-cobalt feed liquid separation. Additionally, the amidogen-containing acid phosphine extraction agent adopted by the application and the method can separate the cobalt from the nickel in all different acid media, has the good extraction and separation capacity, is simple in synthetic method, low in cost, stable in property and easy to industrialize, and has high industrial application value.

Description

technical field [0001] The invention relates to a method for extracting and separating cobalt and nickel, in particular to the use and method of a class of amino acid-containing phosphine extractant for extracting and separating cobalt and nickel. Background technique [0002] Nickel and cobalt are important strategic metals with the characteristics of corrosion resistance, oxidation resistance, high strength and good ductility. As an important raw material for manufacturing lithium batteries, alloys and catalysts, cobalt is widely used in high-tech fields such as national defense, electronics, and aerospace; nickel is an important part of nickel-cadmium batteries and stainless steel, and is widely used in aviation, chemical industry, and telecommunications. aspect. [0003] In recent years, the consumption of nickel and cobalt has maintained a relatively large growth trend, and modern industry requires relatively high purity of nickel and cobalt, so the separation of nicke...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B23/00
CPCC22B23/0453C22B3/3844Y02P10/20
Inventor 廖伍平王永姣李艳玲邝圣庭张志峰吴国龙
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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