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Indium sulfate electrolyte and preparation method thereof

An indium sulfate and electrolyte technology, applied in the metallurgical field, can solve the problems of high cost, decreased indium output, inconvenient production, etc., and achieve the effects of low test condition requirements, high production efficiency and high cost performance

Pending Publication Date: 2022-08-09
FIRST RARE MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the physical and chemical properties of indium element, it dissolves slowly in dilute sulfuric acid. Generally speaking, it takes 60-80 hours for 100kg of refined indium to completely dissolve. The reaction and dissolution time is long, which causes inconvenience to production.
At the same time, the indium content in the electrolyte is generally required to be 70-100g / L, so a large amount of indium is needed to configure the electrolyte, and the cost is very high; the raw materials for preparing high-purity indium sulfate solution are all high-purity indium, so it has to be The high-purity indium that has been produced is returned to the preparation of electrolyte, resulting in a decline in the output of indium

Method used

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  • Indium sulfate electrolyte and preparation method thereof

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Effect test

Embodiment 1

[0031] An embodiment of the indium sulfate electrolyte and its preparation method of the present invention, the preparation method is as follows figure 1 shown, including the following steps:

[0032] (1) Mix 100g of 99.99% indium oxide waste powder and 20mL of standard concentrated sulfuric acid solution in a ceramic crucible and stir evenly, place and mature for 5 hours, add 300mL of pure water to dilute, and then slowly drop 30mL of standard concentrated sulfuric acid solution to obtain solution A;

[0033] (2) adding 2% oxidant to solution A and heating to 40°C and stirring for 20h to obtain solution B; the oxidant is sodium chlorate;

[0034] (3) insert solution B into the granular activated carbon layer prepared by coconut shell and carry out filtration and separation treatment, after gained filtrate adds concentration 15% sodium carbonate solution to adjust pH to 1, adds sodium chloride and gelatin and stirs, to obtain final product The preparation period of the indium s...

Embodiment 2

[0037] An embodiment of the indium sulfate electrolyte and its preparation method of the present invention, the preparation method is as follows figure 1 shown, including the following steps:

[0038] (1) Mix 100g of 99.99% indium oxide waste powder and 30mL of standard concentrated sulfuric acid solution in a ceramic crucible and stir evenly, leave to mature for 3 hours, add 400mL of pure water to dilute, and then slowly drop 20mL of standard concentrated sulfuric acid solution to obtain solution A;

[0039] (2) adding 3% oxidant to solution A and heating to 60°C and stirring for 15h to obtain solution B; the oxidant is sodium hypochlorite;

[0040] (3) insert solution B into the granular activated carbon layer prepared by coconut shell and carry out filtration and separation treatment, after gained filtrate adds concentration 10% sodium carbonate solution to adjust pH to 1, adds sodium chloride and gelatin and stirs, to obtain final product The preparation period of the ind...

Embodiment 3

[0043] An embodiment of the indium sulfate electrolyte and its preparation method of the present invention, the preparation method is as follows figure 1 shown, including the following steps:

[0044] (1) Mix 100g of 99.99% indium oxide waste powder and 40mL of standard concentrated sulfuric acid solution in a ceramic crucible and stir evenly, leave to mature for 1 hour, add 500mL of pure water to dilute, and then slowly drop 10mL of standard concentrated sulfuric acid solution to obtain solution A;

[0045] (2) adding 5% oxidant to solution A and heating to 80°C and stirring for 10h to obtain solution B; the oxidant is hydrogen peroxide;

[0046] (3) insert solution B into the granular activated carbon layer prepared by coconut shell and carry out filtration and separation treatment, after gained filtrate adds concentration 15% sodium carbonate solution and adjusts pH to 2, adds sodium chloride and gelatin and stirs, to obtain final product The preparation period of the indi...

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Abstract

The invention discloses an indium sulfate electrolyte and a preparation method thereof, and belongs to the field of metallurgy. According to the method, the indium oxide waste powder is creatively used as the raw material for preparing the indium sulfate electrolyte, the situation that only high-purity indium metal is used as the raw material in the prior art is broken through, the procedure that the electrolyte is prepared after indium metal is prepared from indium oxide is omitted, and comprehensive utilization of the waste powder is achieved; through the steps of curing, oxidation, tempering and the like under specific conditions, the produced indium sulfate electrolyte is high in purity and meets the requirements of 4.5 N high-purity indium electrolyte, special heating melting, electrolysis or crystallization setting implementation in the prior art is not needed, the requirement for test conditions is low, and the production efficiency and the cost performance are high. The invention also discloses the indium sulfate electrolyte prepared by the method.

Description

technical field [0001] The invention belongs to the field of metallurgy, and in particular relates to an indium sulfate electrolyte and a preparation method thereof. Background technique [0002] With the rapid development of modern technology, the consumption of high-purity indium for the production of liquid crystal panels is increasing day by day, and the purity requirements are also constantly improving, which puts forward higher requirements for its production. In the process of electrorefining and preparing high-purity indium, after the electrolyte has been used for a long time, impurities such as Zn, Pb, Sn, Cd, Tl, etc. from the anode will continue to enter the electrolyte, causing the electrolyte to be polluted. It will also make the produced cathode sponge indium not meet the standard requirements of high-purity indium. For this reason, it is necessary to periodically purify and update the indium electrolyte. The electrolytic production of refined indium generall...

Claims

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Application Information

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IPC IPC(8): C25C1/22
CPCC25C1/22Y02P10/20
Inventor 刘鸿飞李继洪明浩殷亮朱刘
Owner FIRST RARE MATERIALS CO LTD
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