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Method for enriching and recovering gold ions in solution by polyselenourea

A technology for recovering solutions and gold ions, applied in the direction of improving process efficiency, etc., can solve the problems of using toxic chemicals, increasing costs, and high requirements for reagents, and achieve the effects of simple operation, low cost, and low toxicity of raw materials

Active Publication Date: 2020-09-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gold recovery methods include precipitation, ion exchange, solvent extraction, flotation, etc., but its main disadvantages are the use of toxic chemicals, high requirements for reagents, and the generation of toxic secondary waste that needs to be treated
The use of microbial adsorption to enrich gold ions, which has emerged in recent years, has relatively low toxicity, but the cost has increased significantly

Method used

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  • Method for enriching and recovering gold ions in solution by polyselenourea
  • Method for enriching and recovering gold ions in solution by polyselenourea
  • Method for enriching and recovering gold ions in solution by polyselenourea

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A polyselenourea, its structural formula P1:

[0039]

[0040] (1) Gold ion standard solution can be obtained by purchasing (the mother liquor is purchased from Merrill Chemical Reagent Company), the concentration is 1000ppm, and the medium is HNO of 1.5mol / L 3 ; Get 10mL gold ion standard solution, dilute to 100mL with deionized water, this moment gold ion solution concentration is 100ppm, is solution A;

[0041] (2) Dissolve 10 mg of P1 polymer in 1 mL of DMSO to obtain a 10 mg / mL polymer solution, which is solution B;

[0042] (3) Add 120 μL of solution B to 4 mL of solution A, shake for 5 seconds, let stand for 1 minute, and then perform centrifugation at 8000 rpm for 20 minutes;

[0043] (4) Take the separated supernatant and test the gold ion concentration therein, which is 1.66ppm, and the enrichment efficiency of the polymer is calculated to be 98.34%.

Embodiment 2

[0045] A kind of polyselenourea, its structural formula P2:

[0046]

[0047] (1) Solution A, B preparation method are as described in Example 1;

[0048] (2) Add 100 μL of solution B into 4 mL of solution A, shake for 5 seconds and let stand for 1 minute, then perform centrifugation at 8000 rpm for 20 minutes;

[0049] (3) Take the separated supernatant and test the gold ion concentration therein, which is 0.01ppm, and the enrichment efficiency of the polymer is calculated to be 99.99%.

Embodiment 3

[0051] The concentration of solution A in Example 2 was prepared to be 10ppb, and the concentration of gold ions in the supernatant obtained from separation was 0.48ppb, and the enrichment efficiency of the polymer was calculated to be greater than 95.20%.

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Abstract

The invention belongs to the technical field of poly-selenourea application and gold ion recycling, and discloses a method for enriched recycling of gold ions in a solution through poly-selenourea. According to the method, the poly-selenourea and a gold ion containing solution are mixed, separation is conducted, and enriched recycling of the gold ions through the poly-selenourea is achieved; the poly-selenourea and the gold ion containing solution are mixed in a solution or solid form; and according to poly-selenourea mixing in the solution form, the poly-selenourea is dissolved in a good solvent, and the poly-selenourea solution is obtained. By means of the method for enriched recycling of the gold ions in the solution through the poly-selenourea, enrichment of the gold ions in the wasteliquid from trace to massive can be achieved, according to the enrichment method, only simple mixing and filtering are needed, operation is simple and convenient, and the enriching efficiency can be larger than or equal to 99.99%.

Description

technical field [0001] The invention belongs to the technical field of polyselenurea application and recovery of gold ions, and in particular relates to a method for enriching and recovering gold ions in a solution by polyselenurea. Background technique [0002] Gold is a rare trace metal that is widely used in various manufacturing industries and is also widely used by individuals in the form of jewelry, especially printed circuit board electronic devices such as mobile phones and personal computers. Due to its good conductivity and chemical stability And thermal stability is high, and the demand for gold in industry increases. To meet the growing demand for gold, it is also necessary to separate and recover trace amounts of gold from various mining industries, ore and metal processing, electronics manufacturing and e-scrap wastewater. Gold recovery methods include precipitation, ion exchange, solvent extraction, flotation, etc., but their main disadvantages are the use of...

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 唐本忠胡蓉蓉伍秀英秦安军赵祖金
Owner SOUTH CHINA UNIV OF TECH