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A kind of composite extractant and the method for extracting, separating and recovering indium by using the composite extractant

A composite extraction agent, separation and recovery technology, applied in the field of hydrometallurgy, can solve the problems of difficult stripping, poor selectivity, etc., and achieve the effects of good stripping performance, easy regeneration, and high indium extraction rate

Active Publication Date: 2017-09-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems of the currently widely used P204 single extraction system, which has too strong extraction ability for indium and impurity ions, poor selectivity and difficult back-extraction, the present invention provides a composite extractant and a method for extracting, separating and recovering indium with the composite extractant

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The composite extractant includes the following volume percentage components: 5% P204, 5% TBP, 20% TRPO and 70% sulfonated kerosene.

[0021] The method for extracting, separating and recovering indium with the composite extractant, its specific steps are as follows:

[0022] (1) Firstly, add the compound extractant to extract the indium stock solution according to the ratio (organic phase: aqueous phase) of 1:5 for three-stage countercurrent extraction, the temperature is 35 ° C, the mixing time of each stage is 10 minutes, and the sedimentation is 20 minutes after the extraction is completed. The composite extraction agent includes the following volume percentage components: 5% P204, 5% TBP, 20% TRPO and 70% sulfonated kerosene, and the indium-loaded organic phase is obtained after separation; the indium extraction stock solution is the low-acid leaching slag of zinc hydrometallurgy The main chemical composition of the indium-containing solution obtained by reduction ...

Embodiment 2

[0026] The composite extractant includes the following volume percentage components: 5% P204, 20% TBP, 5% TRPO and 70% sulfonated kerosene.

[0027] The method for extracting, separating and recovering indium with the composite extractant, its specific steps are as follows:

[0028] (1) Firstly, add the composite extractant to extract the indium stock solution according to the ratio (organic phase: aqueous phase) of 1:5 for secondary countercurrent extraction. The temperature is 35°C, and the mixing time of each stage is 10 minutes. After the extraction is completed, settle for 20 minutes. The composite extraction agent includes the following volume percentage components: 5%P204, 20%TBP, 5%TRPO and 70%sulfonated kerosene, and after separation, the indium-loaded organic phase is obtained; the original solution of indium extraction is the secondary oxidation produced by a domestic factory. Zinc acid leaching solution, its main chemical composition is: In150mg / L, Zn92g / L, Fe(II)3...

Embodiment 3

[0032] The composite extractant includes the following volume percentage components: 15% P204, 10% TBP, 10% TRPO and 65% sulfonated kerosene.

[0033] The method for extracting, separating and recovering indium with the composite extractant, its specific steps are as follows:

[0034] (1) Firstly, add the compound extractant to the indium extraction stock solution according to the ratio (organic phase: aqueous phase) of 1:4 for three-stage countercurrent extraction. The temperature is 35°C, and the mixing time for each stage is 8 minutes. After the extraction is completed, settle for 15 minutes. The composite extraction agent includes the following volume percentage components: 15% P204, 10% TBP, 10% TRPO and 65% sulfonated kerosene, and the indium-loaded organic phase is obtained after separation; the indium extraction stock solution is the low-acid leaching slag of zinc hydrometallurgy The main chemical composition of the indium-containing solution obtained by reduction leac...

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Abstract

The invention relates to a composite extraction agent and a method for extracting, separating and recycling indium through the composite extraction agent, and belongs to the technical field of wet metallurgy. The composite extraction agent comprises, by volume, 5%-30% of P204, 5%-20% of TBP, 5%-20% o TRPO and 40%-70% of sulfonated kerosene. The method includes the steps that firstly, the composite extraction agent is added to an indium raffinate stock solution for extraction, and indium-loaded organic phases are obtained after extraction and separation are completed; mixed acid composed of sulfuric acid and hydrochloric acid is added to the obtained indium-loaded organic phases for reverse extraction for 10-15 min, the phase ratio of the indium-loaded organic phases to the sulfuric acid and the hydrochloric acid is 5:1-15:1, and a stripping solution is obtained after phase splitting; and metal is added to the stripping solution for displacement according to the liquid-solid ratio of 8-15 ml / g, and sponge indium is obtained finally. All functional groups which have different natures and are included in the composite extraction agent participate in the extraction reaction, so that the selective extraction capacity of the extraction agent is improved, and the reverse extraction property of indium is reduced.

Description

technical field [0001] The invention relates to a composite extractant and a method for extracting, separating and recovering indium with the composite extractant, belonging to the technical field of hydrometallurgy. Background technique [0002] Indium is an important strategic resource and one of the supporting materials for the development of high technology. The reserves of indium in China rank first in the world. Although the reserves are not poor, since there is no independent deposit of indium, it mainly coexists with minerals such as lead, zinc, copper, and tin. According to the current technical level, the comprehensive recovery rate of indium is only 40%. ~60%, recoverable indium is only a tiny fraction of the reserves. Therefore, it is an important research topic to study how to efficiently separate and recover indium from the smelting process of lead, zinc, copper, tin and other metals, and solvent extraction is the key to determine the separation and recovery o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B58/00C22B3/40
CPCY02P10/20
Inventor 李兴彬魏昶邓志敢李存兄樊刚李旻廷荣浩郭小东
Owner KUNMING UNIV OF SCI & TECH
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