Method for preparing gold electrolyte through gold electrolysis anode mud

An anode slime and electrolyte technology, which is applied in the electrolysis process, electrolysis components, photography process, etc., can solve problems such as increasing capital occupation, and achieve the effect of reducing volatilization loss, reducing the amount of raw materials, and reducing the risk of introducing impurity carbon.

Inactive Publication Date: 2020-03-06
GRIKIN ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This means that additional gold raw materials are needed to supplement the liquid p

Method used

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  • Method for preparing gold electrolyte through gold electrolysis anode mud
  • Method for preparing gold electrolyte through gold electrolysis anode mud

Examples

Experimental program
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Effect test

Example Embodiment

[0057] Example 1

[0058] Use gold electrolysis anode slime to prepare gold electrolyte according to the following method:

[0059] (1) Aqua regia dissolution: Take 0.747kg of anode bag containing gold electrolytic anode slime (including 0.526kg of gold electrolytic anode slime) and place it in a crucible, first add 1.5L concentrated hydrochloric acid, then add 0.5L concentrated nitric acid, and heat to 50 Keep stirring until the anode mud is completely dissolved to obtain a red gold solution; take out, wash and dry the anode bag for subsequent use. The obtained gold solution was filtered to obtain filtrate and insoluble matter. Collect the insoluble matter and recover the precious metals after a certain amount.

[0060] (2) Hydrogen peroxide concentration and nitrate removal: The filtrate obtained in step (1) is heated to a boiling state, and hydrogen peroxide is added in batches to remove nitrate. Continue stirring during the nitrate removal process until no yellow smoke is gener...

Example Embodiment

[0064] Example 2

[0065] Use gold electrolysis anode slime to prepare gold electrolyte according to the following method:

[0066] (1) Aqua regia dissolution: Take 1.628kg of anode bag containing gold electrolytic anode slime (including gold electrolytic anode slime 1.204kg) and place it in a crucible, first add 3L concentrated hydrochloric acid, then add 1L concentrated nitric acid, heat to 60℃ and Continue to stir until the anode mud is completely dissolved to obtain a red gold solution; take out, wash and dry the anode bag for subsequent use. The solution was filtered to obtain filtrate and insoluble matter. Collect the insoluble matter and recover the precious metals after a certain amount.

[0067] (2) Hydrogen peroxide concentration and nitrate removal: The filtrate obtained in step (1) is heated to boiling, and hydrogen peroxide is added in batches to remove nitrate. The stirring is continued during the nitrate removal process until no yellow smoke is generated after the ad...

Example Embodiment

[0071] Example 3

[0072] Use gold electrolysis anode slime to prepare gold electrolyte according to the following method:

[0073] (1) Aqua regia dissolution: Take 2.365kg of anode bag containing gold electrolytic anode mud (including gold electrolytic anode mud 1.701kg) and place it in a crucible, first add 4.5L of concentrated hydrochloric acid, then add 1.5L of concentrated nitric acid, and heat to 70 Keep stirring until the anode mud is completely dissolved to obtain a red gold solution; take out, wash and dry the anode bag for subsequent use. The solution was filtered to obtain filtrate and insoluble matter. Collect the insoluble matter and recover the precious metals after a certain amount.

[0074] (2) Hydrogen peroxide concentration and nitrate removal: The filtrate obtained in step (1) is heated to boiling, and hydrogen peroxide is added in batches to remove nitrate. The stirring is continued during the nitrate removal process until no yellow smoke is generated after the ...

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Abstract

The invention discloses a method for preparing a gold electrolyte through gold electrolysis anode mud and belongs to the technical field of gold electrolysis anode mud treatment. The method comprisesthe following steps that (1) the gold electrolysis anode mud is dissolved; (2) reduction for gold preparation is performed; (3) gold powder is dissolved in aqua regia for preparing the gold electrolyte. In step (1), aqua regia or an iodine-potassium iodide solution is adopted for dissolving the gold electrolysis anode mud. The mass ratio of potassium iodide to iodine in the iodine-potassium iodidesolution is larger than or equal to 2:1. In step (2), sodium sulfite or potassium hydroxide is adopted for reduction for gold preparation. According to the method, the overall process of an electrolysis technology is simplified, the fund input is reduced, and the aims of reducing the cost and improving the effect are achieved.

Description

technical field [0001] The invention belongs to the technical field of gold electrolysis anode slime treatment, in particular to a method for preparing gold electrolyte by using gold electrolysis anode slime. Background technique [0002] With the rapid development of science and technology, gold, as an important material in the electronics, communications, semiconductor and other industries, has higher and higher requirements for its purity, from 4N (99.99%) to 5N (99.999%). For example, in the gold or alloy raw materials used for wires, targets and solders in the electronics industry, if 5N high-purity gold is used instead of 4N gold, the solderability, semiconductor characteristics and stability of the material can be effectively improved. [0003] As a common method, electrolysis is widely used in the preparation of 5N high-purity gold. Its advantages mainly include: simple production process, short cycle; less pollution than chemical reduction method; large output; rel...

Claims

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Application Information

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IPC IPC(8): C25C1/20C25C7/06
CPCC25C1/20C25C7/06
Inventor 马贤杰陈斐关俊卿贺昕侯智超罗瑶王鹏
Owner GRIKIN ADVANCED MATERIALS
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