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Method for preparing electronic grade high-purity nickel bromide solution

A pure nickel bromide, electronic-grade technology, applied in nickel halide and other directions, can solve problems such as backwardness, and achieve the effect of simple process, high purity and improved activity

Active Publication Date: 2011-08-17
GUANGDONG GUANGHUA SCI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other nickel salts, there is very little research on how to prepare high-purity nickel bromide solution, and the existing production technology is relatively backward. If some key units in the existing production technology can be transformed or developed, it will be a great achievement. a proven solution

Method used

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  • Method for preparing electronic grade high-purity nickel bromide solution
  • Method for preparing electronic grade high-purity nickel bromide solution
  • Method for preparing electronic grade high-purity nickel bromide solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Weigh 14.7g of high-purity metal nickel powder and 200ml of pure water, add them to a three-necked flask with a condensation reflux device, stir and heat to 75°C;

[0016] (2) Measure the hydrobromic acid 100g that mass concentration is 40%, join in above-mentioned flask, keep reaction temperature and be 75 ℃, solution color is gradually darkened by light green, when the pH value of solution reaches 3, stop reaction, react The time is 8 hours, and the reaction liquid is filtered, and the specific gravity of the filtrate is 1.202, and a nickel bromide solution with a nickel mass concentration of 4.62% is obtained.

Embodiment 2

[0018] (1) Weigh 14.7g of high-purity metallic nickel powder and 200ml of pure water into a three-necked flask with a condensation reflux device, stir and heat to 75°C;

[0019] (2) Measure the hydrobromic acid 100g that the mass concentration is 40% and join in the above-mentioned flask, keep the reaction temperature to be 75°C, slowly add 50% hydrogen peroxide 17g in the mass concentration, and observe that the color of the solution changes from light green to After brown, it gradually turns dark green again. When the pH value of the solution reaches 3, the reaction is stopped. The reaction time is 2.5 hours. The reaction solution is filtered to adjust the specific gravity of the filtrate to 1.205, and the obtained mass concentration is 18%, and the nickel content is 5.04%. nickel bromide solution.

Embodiment 3

[0021] (1) Weigh 29.4g of high-purity metallic nickel powder and 400ml of pure water into a three-necked flask with a condensation reflux device, stir and heat to 80°C;

[0022] (2) Measure the hydrobromic acid 200g that mass concentration is 40% and join in the above-mentioned flask, keep reaction temperature and be 80 ℃, slowly drip the hydrogen peroxide 34g that mass concentration is 50%, observe that the color of solution changes from light green to After brown, it gradually turns dark green again. When the pH value of the solution reaches 3.5, the reaction is stopped. The reaction time is 3.0h. The reaction solution is filtered to adjust the specific gravity of the filtrate to 1.209, and the obtained mass concentration is 18%, and the nickel content is 5.10%. nickel bromide solution.

[0023] The nickel powder of above-mentioned embodiment adopts high-purity nickel powder, and its every impurity index is as follows:

[0024]

[0025] From above-mentioned embodiment 1 ...

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Abstract

The invention provides a method for preparing electronic grade high-purity nickel bromide solution. The method has the following beneficial effects: the activity of nickel powder is substantially improved by dropwise adding hydrogen peroxide in the reaction system of nickel and hydrobromic acid and controlling the pH value at the end point of the reaction system to be in the range of stronger acidity, thus greatly shortening the reaction time and improving the nickel content of the final product; compared with the traditional synthesis method, the method provided by the invention has the advantages of simple process, high reaction speed, no introduction of impurities in the preparation process, low impurity content, no need for further separation and purification, simple post-treatment and low production cost; and the product prepared by the method has high purity, achieves the level of international like products in terms of quality and conforms to the use standard in the electronic industry.

Description

technical field [0001] The invention relates to a method for preparing nickel salt, in particular to a method for preparing nickel bromide, and more particularly to a method for preparing a high-purity nickel bromide solution suitable for use in the electronics industry. Background technique [0002] Nickel salts include nickel sulfate, nickel hydroxide, nickel carbonate, nickel methanesulfonate, nickel chloride and nickel bromide, etc., which are widely used in the chemical industry, mainly for nickel plating, nickel powder, nickel catalyst , making alkaline batteries, making metal colorants and making gas adsorbents, etc. Nickel sulfate is usually prepared by reacting metallic nickel with sulfuric acid and nitric acid, while other nickel salts are generally prepared by reacting nickel hydroxide or nickel carbonate with corresponding acids. As one of many nickel salts, nickel bromide is traditionally synthesized by neutralizing hydrobromic acid with the corresponding alkal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/08
Inventor 谭泽李明周一朗黄永润黄司平
Owner GUANGDONG GUANGHUA SCI TECH