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Composite extractant, preparation thereof and application thereof in metal indium extraction

A composite extractant and metal extraction technology, applied in the fields of chemical industry and metallurgy, can solve the problems of low indium extraction efficiency, high price, low selectivity, etc., and achieve easy back-extraction, weak emulsification, and good chemical stability. Effect

Inactive Publication Date: 2011-05-25
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the extraction of metal indium, the selectivity is not strong, and the extraction efficiency of indium is not high
[0007] New extractants for indium extraction in foreign countries include DS5834 (similar to monoester-phosphoric acid), trihydrocarbyl phosphoric acid and its mixture with di-acid phosphorus oxides C-2HPP, Cyanex301, P507, etc. These extractants are relatively The performance of P204 has been greatly improved, but this kind of extractant has not yet been industrialized in China due to its high price.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 1. Formula: by volume percentage

[0022] Di(2-ethylhexyl) phosphate (P204): 60%

[0023] Mixture of trioctylphosphine oxide and hexylphosphine oxide in a volume of 1:5 (C923): 30%

[0024] Trialkylphosphine oxide (TRPO): 10%

[0025] 2. Process: Mix P204, C923 and TRPO of the above formula evenly under stirring.

[0026] 3. The application of compound extractant in the extraction of metal indium:

[0027] (1) Dilution of compound extractant

[0028] The composite extractant prepared above was diluted with sulfonated kerosene at a volume ratio of 1:3.

[0029] (2) Extraction of leached indium-rich solution

[0030] The indium-rich solution after acid leaching in the process of extracting indium from lead-zinc smelting waste residue by Qinghai Western Indium Industry Co., Ltd. was extracted. The main chemical composition analysis results of the leachate obtained after acid leaching: Zn: 98g / L, Fe: 30g / L, In: 0.4g / L.

[0031] With the diluted compound extractant-su...

Embodiment 2

[0037] 1. Formula: by volume percentage

[0038] Di(2-ethylhexyl) phosphate (P204): 70%

[0039] Mixture of trioctylphosphine oxide and hexylphosphine oxide in a ratio of 1:7 (C923): 25%

[0040] Trialkylphosphine oxide (TRPO): 5%

[0041] 2. Process: Mix P204, C923 and TRPO of the above formula evenly under stirring.

[0042] 3. The application of compound extractant in the extraction of metal indium:

[0043] (1) Dilution of compound extractant

[0044] The composite extractant prepared above was diluted with 1.8 times its volume of sulfonated kerosene.

[0045] (2) Extraction of indium-rich solution

[0046] The indium-rich solution after acid leaching in the process of extracting indium from lead-zinc smelting waste residue by Qinghai Western Indium Industry Co., Ltd. was extracted. The main chemical composition analysis results of the leachate obtained after acid leaching: Zn: 98g / L, Fe: 30g / L, In: 0.4g / L.

[0047] With the diluted compound extractant-sulfonated ke...

Embodiment 3

[0053] 1. Formula: by volume percentage

[0054] Di(2-ethylhexyl) phosphate (P204): 80%

[0055] Mixture of trioctylphosphine oxide and hexylphosphine oxide in a volume ratio of 1:7 (C923): 20%

[0056] 2. Process: Mix P204 and C923 of the above formula evenly under stirring.

[0057] 3. The application of compound extractant in the extraction of metal indium:

[0058] (1) Dilution of compound extractant

[0059] Dilute the composite extractant prepared above with sulfonated kerosene twice its volume.

[0060] (2) Extraction of leached indium-rich solution

[0061] The indium-rich solution after acid leaching in the process of extracting indium from lead-zinc smelting waste residue by Qinghai Western Indium Industry Co., Ltd. was extracted. The main chemical composition analysis results of the leachate obtained after acid leaching: Zn: 98g / L, Fe: 30g / L, In: 0.4g / L.

[0062] With the diluted compound extractant-sulfonated kerosene as the extractant, the extraction ratio is ...

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PUM

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Abstract

The invention relates to a composite extractant used in a metal indium extraction process. The composite extractant is formed by mixing Bis(2-ethylhexyl)phosphate (P204), trioctylphosphine oxide and hexylphosphine oxide mixture liquid (C923) and trialkyphosphine oxides (TRPO) according to certain proportion. After being diluted with sulfonated kerosene, the composite extractant is used as an extractant used for metal indium extraction. The composite extractant has good chemical stability, good selectivity and high indium extraction efficiency which can achieve more than 90%, simultaneously can reduce the extractant emulsification, is easy for re-extraction, and the demand to extraction conditions of a system is not high.

Description

technical field [0001] The invention belongs to the technical field of metallurgy and chemical industry, and relates to an extractant used in the extraction process of extracting metal indium. The invention also relates to the application of the composite extractant in extracting metal indium. Background technique [0002] Indium is a rare element in the earth's crust. It cannot be independently ore-formed, but is dispersedly distributed in other minerals, most of which exist in sphalerite and galena in a sparse state. When the content of indium reaches 0.002%, it has industrial recycling value. Scattered metal indium is widely used in high-tech fields such as electronic computers, energy, electronics, optoelectronics, aviation, nuclear industry, chemical industry and modern information industry. [0003] The methods for extracting indium include the flotation method of treating the lead-zinc leaching slag with a flocculant, the volatilization method of collecting oxide du...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/38C22B3/40C22B58/00
CPCY02P10/20
Inventor 贾永忠王小华孟宪党孙进贺景燕高峰姚颖马军徐跃伟马增玲
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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