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A method for recovering precious metals from solutions containing precious metal ions

A technology for precious metal ions and precious metals, which is applied in the field of precious metal recovery to achieve the effects of safe recovery process, improved recovery rate and good application prospects

Active Publication Date: 2021-07-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the inert surface of precious metals, polyethyleneimine cannot fully form adsorption cross-linking with precious metals.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] a The powdered sulfur is pressed into tablets, wherein the thickness of the sheet is 0.01cm;

[0017] b. Use the sheet pressed in step a as the positive electrode material, use metal lithium as the negative electrode, and use 1mol / L lithium hexafluorophosphate ethylene carbonate solution as the electrolyte, assemble it into a lithium ion battery, and discharge it to 1.5V;

[0018] c Disassemble the battery discharged to 1.5V through step b, take out 1 g of discharged sulfur obtained in step b, disperse it in 20 g of gold ion-containing solution, and soak for 1 h to obtain a sulfur / gold composite;

[0019] d dissolving the sulfur / gold complex obtained in step c in carbon disulfide, and finally filtering to separate sulfur and gold.

Embodiment 2

[0021] a powdery selenium pressed into tablets, wherein the thickness of the sheet is 0.5cm;

[0022] b Use the sheet pressed in step a as the positive electrode material, use sodium metal as the negative electrode, and use 1mol / L sodium hexafluorophosphate ethylene carbonate solution as the electrolyte, assemble it into a sodium ion battery, and discharge it to 0.001V;

[0023] c Disassemble the battery discharged to 0.001V through step b, take out 1g of discharged selenium prepared in step b, place it in 20g of silver ion-containing solution, disperse and soak for 24h, and obtain the selenium / silver compound;

[0024] d dissolving the selenium / silver complex obtained in step c in carbon disulfide, and finally filtering to separate selenium and silver.

Embodiment 3

[0026] a The powdered tellurium is pressed into tablets, wherein the thickness of the tablet is 0.1cm;

[0027] b. Use the sheet pressed in step a as the positive electrode material, use metallic lithium as the negative electrode, and use 1mol / L lithium hexafluorophosphate ethylene carbonate solution as the electrolyte, assemble it into a lithium ion battery, and discharge it to 0.01V;

[0028] c. Disassemble the battery discharged to 0.01V through step b, take out 1 g of the discharged tellurium prepared in step b, disperse it in 10 g of platinum ion-containing solution, soak for 10 h, and obtain a tellurium / platinum composite;

[0029] d dissolving the tellurium / platinum complex obtained in step c in carbon disulfide, and finally filtering and separating tellurium and platinum.

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PUM

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Abstract

The invention relates to a method for recovering noble metals from a solution containing noble metal ions, and belongs to the technical field of extraction and recovery of noble metals. In the present invention, firstly, the powdered oxygen group elements are compressed into tablets, and assembled into a battery as a positive electrode material, discharged to 1.5-0.001V, and then the discharged oxygen group elements are taken out and dispersed in a solution containing a soluble noble metal salt , soaking, and reducing noble metal ions to obtain the elemental element / noble metal compound of the oxygen group element. After filtration, the elemental element element / noble metal compound of the oxygen group element is placed in a carbon disulfide solution to dissolve the elemental element of the oxygen group element, and the noble metal is obtained by filtering and separating the elemental element of the oxygen group element. After the carbon disulfide is volatilized, the oxygen group elements can be obtained, which can be recycled, the recovery process is safe, the cost is low, and the recovery rate of precious metals is high.

Description

technical field [0001] The invention relates to a method for recovering noble metals from a solution containing noble metal ions, and belongs to the technical field of extraction and recovery of noble metals. [0002] technical background [0003] Precious metals mainly refer to eight metal elements including gold, silver and platinum group metals (ruthenium, rhodium, palladium, osmium, iridium, platinum). Most of these metals have beautiful colors, are quite resistant to chemicals, and are not easy to cause chemical reactions under normal conditions. Therefore, it is widely used in decoration industry, electronics industry, automobile industry and other industries. At the same time, due to its excellent chemical stability, it has become a national strategic reserve material. However, such precious metal resources have few reserves on the earth, and many mineral resources are of low grade, which increases the difficulty of mining them. The content of these precious metal r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B11/00
CPCC22B7/006C22B11/042Y02P10/20
Inventor 方东鲍瑞易健宏李秀娟
Owner KUNMING UNIV OF SCI & TECH