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Composite extraction agent and method for extracting, separating and recycling indium through composite extraction agent

A compound 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 effect of good stripping performance, easy regeneration, and improved selective extraction capacity

Active Publication Date: 2015-11-04
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 components by volume percentage: 5% P204, 5% TBP, 20% TRPO and 70% sulfonated kerosene.

[0021] The method for extracting, separating and recovering indium with the composite extractant has the following specific steps:

[0022] (1) First, extract the stock solution of indium according to the ratio (organic phase: water phase) of 1:5 by adding a composite extractant for three-stage countercurrent extraction at a temperature of 35°C, mixing time for each stage for 10 minutes, and settling for 20 minutes after the extraction is complete. The composite extractant includes the following components by volume percentage: 5% P204, 5% TBP, 20% TRPO, and 70% sulfonated kerosene. After separation, the indium-carrying organic phase is obtained; the indium extraction solution is the low-acid leaching residue of zinc hydrometallurgy The main chemical components of the indium-containing solution obtained by reduction leaching are: In135mg / L...

Embodiment 2

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

[0027] The method for extracting, separating and recovering indium with the composite extractant has the following specific steps:

[0028] (1) First, extract the stock solution of indium according to the ratio (organic phase: water phase) of 1:5 by adding a composite extractant for secondary countercurrent extraction at a temperature of 35°C, mixing time for each stage 10 minutes, and settling for 20 minutes after the extraction is complete. The composite extractant includes the following components by volume percentage: 5% P204, 20% TBP, 5% TRPO and 70% sulfonated kerosene, and the indium-carrying organic phase is obtained after separation; the indium extraction solution is the secondary oxidation produced by a domestic factory Zinc acid leaching solution, its main chemical components are: In150mg / L, Zn92g / L, Fe(II) 35g / L, Fe(III) 0.2g / L...

Embodiment 3

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

[0033] The method for extracting, separating and recovering indium with the composite extractant has the following specific steps:

[0034] (1) First, extract the original indium solution according to the ratio (organic phase: water phase) of 1:4 by adding a composite extractant for three-stage countercurrent extraction, at a temperature of 35°C, mixing time for each stage 8 minutes, and settling for 15 minutes after the extraction is complete. The composite extractant includes the following components by volume percentage: 15% P204, 10% TBP, 10% TRPO, and 65% sulfonated kerosene. After separation, the indium-carrying organic phase is obtained; the indium extraction solution is the low-acid leaching residue of zinc hydrometallurgy The main chemical components of the indium-containing solution obtained by reduction leaching are: In280mg / L...

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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 from the composite extractant, and belongs 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. China's indium reserves rank first in the world. Although it is not poor in terms of reserves, indium does not have independent deposits and mainly co-exists with lead, zinc, copper, tin and other minerals. According to the current technical level, the comprehensive recovery rate of indium is only 40%. ~60%, the recoverable indium is only a very small part of the reserves. Therefore, studying how to efficiently separate and recover indium from lead, zinc, copper, tin and other metal smelting processes is an important research topic, and solvent extraction is the key to determining the separation and recovery of indium....

Claims

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Application Information

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Patent Type & Authority Applications(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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