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Method for efficiently separating and extracting metal indium from acid solution

A technology for extracting metals and acidic solutions, applied in the improvement of process efficiency, photography technology, instruments, etc., can solve problems such as accumulation, and achieve the effect of efficient separation and extraction

Active Publication Date: 2021-07-16
GUANGDONG INST OF RARE METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But judging from the result graph in the article, Fe 3+ The extraction rate still reached 5% ~ 10%, In 3+ with Fe 3+ Complete separation is not achieved, which will also cause Fe 3+ Accumulation in the organic phase

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A mixed extractant for extracting indium, by volume fraction, including bis(2-ethylhexyl) phosphate (P204) 14%, tributyl phosphate (TBP) 58% and [BMIm]PF 6 28%.

[0023]A method for efficiently separating and extracting metal indium from an acidic solution, comprising the steps of:

[0024] (1) Indium-containing sulfuric acid solution with pH=0.75, which contains In 3+ 37.0mg / L, Fe 3+ 3.548g / L, Zn 2+ 34.725g / L, with P204:TBP:[BMIm]PF 6 =14%:58%:28% mixed homogeneous system is used as the organic phase for single-stage extraction to obtain an indium-rich organic phase, the volume ratio of the extraction phase (indium-containing sulfuric acid solution and organic phase) A / O=2:1, the extraction The time is 5min, the extraction temperature is room temperature, In the raffinate 3+ 1.4mg / L, Fe 3+ 3.548g / L, Zn 2+ 34.725g / L, the extraction rate of each element: In 3+ 96.22%, Fe 3+ 0.0%, Zn 2+ 0.0%.

[0025] (2) Indium-rich organic phase contains In 3+ 71.2mg / L, the...

Embodiment 2

[0044] A mixed extractant for extracting indium, by volume fraction, including bis(2-ethylhexyl) phosphate (P204) 17%, tributyl phosphate (TBP) 48% and [BMIm]PF 6 35%.

[0045] A method for efficiently separating and extracting metal indium from an acidic solution, comprising the steps of:

[0046] Indium-containing sulfuric acid solution with pH=1.5, which contains In 3+ 37.0mg / L, Fe 3+ 3.548g / L, Zn 2+ 34.725g / L, with P204:TBP:[BMIm]PF 6 =17%:48%:35% mixed homogeneous system is used as the organic phase for single-stage extraction to obtain an indium-rich organic phase, the volume ratio of the extraction phase (sulfuric acid solution containing indium and the organic phase) is A / O=5:1, and the extraction time for 15 min, and the extraction temperature was room temperature. In the raffinate 3+ 3.55mg / L, Fe 3+ 3.548g / L, Zn 2+ 34.725g / L, the extraction rate of each element: In 3+ 90.4%, Fe 3+ 0.0%, Zn 2+ 0.0%.

[0047] (2) Indium-rich organic phase contains In 3+ 167...

Embodiment 3

[0056] A mixed extractant for extracting indium, by volume fraction, including bis(2-ethylhexyl) phosphate (P204) 10%, tributyl phosphate (TBP) 60% and [BMIm]PF 6 30%.

[0057] A method for efficiently separating and extracting metal indium from an acidic solution, comprising the steps of:

[0058] (1) Indium-containing sulfuric acid solution with pH=3.0, which contains In 3+ 37.0mg / L, Fe 3+ 3.548g / L, Zn 2+ 34.725g / L, with P204:TBP:[BMIm]PF 6 =10%:60%:30% mixed homogeneous system is used as the organic phase for single-stage extraction to obtain an indium-rich organic phase, the volume ratio of the extraction phase (indium-containing sulfuric acid solution and organic phase) is A / O=1:1, and the extraction time for 10 min, and the extraction temperature was room temperature. In the raffinate 3+ 0.66mg / L, Fe 3+ 3.548g / L, Zn 2+ 34.725g / L, the extraction rate of each element: In 3+ 98.22%, Fe 3+ 0.0%, Zn 2+ 0.0%.

[0059] (2) Indium-rich organic phase contains In 3+ ...

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PUM

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Abstract

The invention discloses a method for efficiently separating and extracting metal indium from an acid solution. A mixed extracting agent for extracting indium comprises bis(2-ethylhexyl) phosphate, tributyl phosphate and hydrophobic room-temperature molten salt. The mixed extracting agent (hydrophobic room-temperature molten salt+TBP+P204) for extracting indium has specificity when used for extracting In<3+> in a sulfuric acid solution, ions such as Fe<3+> and Zn<2+> are hardly extracted, efficient reverse extraction can be achieved on an indium-rich organic phase or high-purity metal indium can be obtained through constant-potential electrodeposition, the technological process is not affected by the ions such as Fe<3+> and Zn<2+>, and therefore efficient separation and extraction of indium are achieved.

Description

Technical field: [0001] The invention relates to the technical field of metal smelting, in particular to a method for efficiently separating and extracting metal indium from an acidic solution. Background technique: [0002] Indium has a strategic position in the fields of electronics, telecommunications, optoelectronics, national defense, and communications, and is a supporting material for the development of high-tech. Indium is an associated metal. There is no independent indium deposit in nature. It mainly exists in zinc sulfide ore in the form of associated deposits. Hydrometallurgy is the most important zinc smelting method in the world today. 85% of zinc in my country is produced by wet Zinc hydrometallurgy is mainly based on the “roasting-leaching-purification-electrodeposition” process. Under this process, indium and impurity metals are enriched in the leaching slag. Therefore, the zinc hydrometallurgy waste slag becomes the primary One of the main raw materials of i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B58/00C22B3/38C25C1/22
CPCC22B58/00C25C1/22Y02P10/20
Inventor 高丽霞戴子林吴海鹰杨锐吴长永
Owner GUANGDONG INST OF RARE METALS
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