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A method for simultaneously extracting elemental gold and elemental metal

A metal element and elemental gold technology, applied in the direction of improving process efficiency, can solve the problems of high cost, slow extraction rate, high toxicity, etc., and achieve the effects of fast extraction rate, simple operation and high purity

Active Publication Date: 2020-05-22
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional gold extraction methods mainly use cyanide method, thiourea method, etc. Although these methods can extract gold, the above methods have the problems of high toxicity, high cost and slow extraction rate.
[0003] 4,4′-Azo-1,2,4-triazole (ATRZ), as one of the nitrogen-rich heterocyclic compounds, contains multiple nitrogen atoms with strong coordination ability, so it has a wide range of applications in the field of coordination chemistry. The application of it is to synthesize a coordination compound with metal cations and bromoauric acid ions and use it to recover simple gold, but there is no relevant report so far.

Method used

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  • A method for simultaneously extracting elemental gold and elemental metal
  • A method for simultaneously extracting elemental gold and elemental metal
  • A method for simultaneously extracting elemental gold and elemental metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A method for simultaneously extracting elemental gold and elemental metal, the steps of the method are as follows:

[0039] (1) Preparation of neutral solution containing bromoauric acid ions: AMD Athlon TM The discarded central processing unit (CPU) of 64 × 2 models is first pulverized with a DX100 pulverizer produced by Dongguan Dingxiang Company, and then further ground into powder, and then 5g of this powder is added to 25mL of configured concentrated nitric acid ( Mass fraction is 68%) in the mixed solution of hydrobromic acid (the volume ratio of concentrated nitric acid and hydrobromic acid 1:3) reaction 3h, filter off filter residue after reaction finishes, slowly add NaOH and NaHCO in the clear and transparent solution 3 Alkaline solution with a mass ratio of 1:2 until the pH of the solution is 7, and then filtered again to obtain a clear and transparent solution, which is a neutral solution containing bromoauric acid ions.

[0040] (2) bromoauric acid ion co...

Embodiment 2

[0050] A method for simultaneously extracting elemental gold and elemental metal, the steps of the method are as follows:

[0051] (1) Preparation of neutral solution containing bromoauric acid ions: AMD Athlon TM The discarded central processing unit (CPU) of 64 × 2 models is first pulverized with a DX100 pulverizer produced by Dongguan Dingxiang Company, and then further ground into powder, and then 5g of this powder is added to 25mL of configured concentrated nitric acid ( The mass fraction is 68%) and hydrobromic acid in the mixed solution (volume ratio of concentrated nitric acid and hydrobromic acid 1:3) to react for 2h, filter the filter residue after the end of the reaction, and slowly add NaOH and NaHCO dropwise to the clear and transparent solution 3 Alkaline solution with a mass ratio of 1:2 until the pH of the solution is 7, and then filtered again to obtain a clear and transparent solution, which is a neutral solution containing bromoauric acid ions.

[0052] (2...

Embodiment 3

[0061] A method for simultaneously extracting elemental gold and elemental metal, the steps of the method are as follows:

[0062] (1) Preparation of neutral solution containing bromoauric acid ions: AMD Athlon TMThe discarded central processing unit (CPU) of 64 × 2 models is first pulverized with a DX100 pulverizer produced by Dongguan Dingxiang Company, and then further ground into powder, and then 5g of this powder is added to 25mL of configured concentrated nitric acid ( Mass fraction is 68%) in the mixed solution of hydrobromic acid (volume ratio of concentrated nitric acid and hydrobromic acid 1:3) reaction 5h, filter off filter residue after reaction finishes, in the clear and transparent solution, slowly add NaOH and NaHCO 3 Alkaline solution with a mass ratio of 1:2 until the pH of the solution is 7, and then filtered again to obtain a clear and transparent solution, which is a neutral solution containing bromoauric acid ions.

[0063] (2) bromoauric acid ion concent...

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Abstract

The invention belongs to the technical field of metal recycling, and particularly relates to a method for extracting a gold element and a second metal element at the same time. Waste containing the gold element is crushed and ground into powder, the powder is added into a mixed solution of concentrated nitric acid and hydrobromic acid to have a reaction until a clear and transparent solution is obtained, an alkaline solution is dropwise added until the solution is neutral, secondary filtering is carried out, and a neutral solution containing bromauric acid ions is obtained; the neutral solution is mixed with an ATRZ solution, the solution of soluble metal salt is dropwise added, stirring is carried out until precipitate is obtained, the precipitate is washed and dried, and an intermediateproduct is obtained; the intermediate products is sintered, and a mixture obtaining the gold element and an M element can be obtained; and after separation, the gold element and the M element can be obtained; and the method is easy to operate, and the extraction rate is high.

Description

technical field [0001] The invention belongs to the technical field of metal recovery, and in particular relates to a method for simultaneously extracting simple gold and a second simple metal. Background technique [0002] As a precious metal, gold has low reserves on the surface, so it is of great significance to rationally recycle gold resources. Gold has good chemical stability, electrical conductivity, thermal conductivity, etc., so it is widely used in instrumentation manufacturing and electronics industries. , electroplating and conductive materials have a wide range of applications. With the use of a large number of electronic products in the 21st century, the waste of gold resources and environmental pollution of heavy metal ions brought by electronic components is a huge challenge we face, so recycling metals in waste is of great significance. Traditional gold extraction methods mainly use cyanide method, thiourea method, etc. Although these methods can extract go...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B11/00C22B15/00C22B23/00C22B47/00
CPCC22B7/001C22B7/006C22B11/021C22B11/042C22B15/0089C22B23/0461C22B47/0081Y02P10/20
Inventor 李生华彭盼盼庞思平胡宝平史庆嵘赵超峰
Owner BEIJING INSTITUTE OF TECHNOLOGYGY