Method for preparing battery grade indium hydroxide and indium oxide

An indium hydroxide and battery-level technology, which is applied in chemical instruments and methods, inorganic chemistry, gallium/indium/thallium compounds, etc., can solve the problem of inaccurate concentration of raw materials and precipitants, low purity of indium hydroxide and indium oxide , uneven fluidity and other issues, to achieve good economic feasibility, low cost, and control the effect of reaction speed

Inactive Publication Date: 2011-06-15
ZHUZHOU SMELTER GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since sodium hydroxide is used as the precipitating agent and pH value adjusting agent in the neutralization process, more sodium ions that are difficult to wash are brought in, and the concentration of raw materials and precipitating agents is not accurately

Method used

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  • Method for preparing battery grade indium hydroxide and indium oxide
  • Method for preparing battery grade indium hydroxide and indium oxide

Examples

Experimental program
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Effect test

Embodiment 1

[0051] Melt 500g of 4N indium at 160°C, quench with water to obtain indium flower, take it out and react with nitric acid, that is, slowly add about 500mL of nitric acid with a concentration (wt%) of 68% under constant stirring, and add an appropriate amount of conductivity less than 500us / cm, soluble SiO 2 Less than 0.02mg / L of water, get In 3+ The concentration is 1.5 mol / L indium nitrate solution; 450 mL of ammonia water with a mass concentration of 27% and 1350 mL of water are prepared at a volume ratio of 1:3 to obtain an ammonia solution with a weight concentration of 6.2%. The above-mentioned indium nitrate solution and ammonia solution are simultaneously added with a conductivity of less than 500us / cm and soluble SiO under constant stirring conditions. 2 In a reactor with water lower than 0.02 mg / L as the bottom liquid, the temperature of the reaction system is controlled at 90°C, the process pH is 4.0, and the end pH is 5.0. After the addition, react for 30 minutes and ...

Embodiment 2

[0053] Melt 500g of 4N indium at 180℃, quench with water to obtain indium flower, take it out and react with nitric acid, that is, slowly add about 500mL of nitric acid with a concentration (wt%) of 68% under constant stirring, and add an appropriate amount of conductivity less than 500us / cm, soluble SiO 2 Less than 0.02mg / L of water, get In 3+ The concentration is 1.0 mol / L indium nitrate solution; 450 mL of ammonia water with a weight concentration of 27% and 900 mL of water are prepared at a volume ratio of 1:2 to obtain an ammonia solution with a weight concentration of 8.3%. The above-mentioned indium nitrate solution and ammonia solution are simultaneously added with a conductivity of less than 500us / cm and soluble SiO under constant stirring conditions. 2 In a reactor with water less than 0.02 mg / L as the bottom liquid, the temperature of the reaction system is controlled to 80°C, the process pH is 4.5, and the end pH is 5.2. After the addition, react for 40 minutes and f...

Embodiment 3

[0055] Melt 500g of 4N indium at 200℃, quench with water to obtain indium flower, take it out and react with nitric acid, that is, slowly add about 500mL of nitric acid with a concentration (wt%) of 68% under constant stirring, and add an appropriate amount of conductivity less than 500us / cm, soluble SiO 2 Less than 0.02mg / L of water, get In 3+ The concentration is 0.5 mol / L indium nitrate solution; 450 mL of ammonia water with a weight concentration of 27% and 450 mL of water are prepared at a volume ratio of 1:1 to obtain an ammonia solution with a weight concentration of 12.8%. Add the above-mentioned indium nitrate solution and aqueous ammonia solution under constant stirring conditions with a conductivity of less than 500us / cm and soluble SiO 2 In a reactor with water lower than 0.02 mg / L as the bottom liquid, the temperature of the reaction system is controlled at 60°C, the process pH is 5.0, and the end pH is 6.0. After the addition, react for 50 minutes and filter to obt...

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Abstract

The invention discloses a method for preparing battery grade indium hydroxide and indium oxide, which aims to provide the method for preparing the indium hydroxide and the indium oxide. The method ensures simple process, relatively lower cost and relatively higher product quality. In the method, refined indium solids serve as raw materials; and the method is characterized by comprising the following steps of: A, melting and water quenching, namely, performing melting and water quenching on the refined indium solids to prepare indium flowers; B, nitric acid dissolution, namely, adding a nitric acid into the indium flowers prepared by the step A to dissolve the indium flowers to obtain solution of indium nitrate; C, the neutralization and filtration of ammonia water, namely, adding the ammonia water into the solution of indium nitrate obtained by the step B for neutralization and filtration to prepare indium hydroxide filtration residues and filtrate, and separately treating the filtrate; and D, drying, powder preparation and calcination, namely, adding water into the indium hydroxide filtration residues obtained by the step C for washing and filtration to obtain filtration residues and the filtrate, separately treating the filtrate, and performing drying, powder preparation and calcination on the filtration residues to obtain the battery grade indium hydroxide and the indium oxide. The method is mainly used for preparing the high-quality indium hydroxide and the high-quality indium oxide.

Description

Technical field [0001] The invention relates to a preparation method of indium hydroxide and indium oxide, in particular to a preparation method of battery-grade indium hydroxide and indium oxide. Background technique [0002] Indium hydroxide is a white powder, and indium oxide is a light yellow powder, which is widely used. Indium hydroxide and indium oxide are mainly used as mercury replacement corrosion inhibitors and gettering agents for alkaline manganese batteries, and are also widely used in traditional fields such as colored glass, ceramics, and chemical reagents. In recent years, it has been widely used in high-tech fields such as the optoelectronic industry and military fields. It is especially suitable for processing indium tin oxide (ITO) target materials, manufacturing transparent electrodes and transparent heat reflector materials, and used in the production of flat liquid crystal displays and defogging ice devices. . It is one of the research hotspots in the fie...

Claims

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Application Information

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IPC IPC(8): C01G15/00
Inventor 刘一宁刘朗明窦传龙林文军王全廖贻鹏
Owner ZHUZHOU SMELTER GRP
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