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Method for preparing high-purity beryllium hydroxide from low-purity beryllium hydroxide

A beryllium hydroxide, low-purity technology, applied in the direction of beryllium oxide/hydroxide, etc., can solve the problems that the purity cannot meet the requirements of high-purity or nuclear pure beryllium fluoride, and there are many impurities in the product.

Inactive Publication Date: 2016-05-18
NANHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, the raw material of beryllium hydroxide is high-grade beryllium ore or flotation beryllium concentrate, which is leached with high-concentration sulfuric acid and reprecipitated to obtain beryllium hydroxide product, but there are too many impurities in the product, and the purity is far from that of high-purity or nuclear Pure Beryllium Fluoride Requirements

Method used

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Embodiment 1

[0015] Embodiment 1, the method for preparing high-purity beryllium hydroxide by using low-purity beryllium hydroxide, described low-purity beryllium hydroxide is to utilize high-grade beryllium ore or beryllium concentrate to be leached with high-concentration sulfuric acid, after the leaching solution removes impurities, and then The product obtained by precipitation with ammonia water contains impurities in the low-purity beryllium hydroxide product, and the main components of the impurities are: SO 4 2- , Si, Al and Fe, among them, SO 4 2- The content of Si is 1.0-10.0%, the content of Si is 0.05-0.50%, the content of Al is 0.02-0.20%, and the content of Fe is 0.05-0.5%.

[0016] Beryllium hydroxide is an amphoteric hydroxide, which can react with both strong acid and strong base, but its solubility in water is very small, at 25°C, it is 2×10 -3 g / L, react it with strong alkali sodium hydroxide, and it can be fully dissolved under heating conditions. After dissolving, t...

Embodiment 2

[0023] Embodiment 2, the method for preparing high-purity beryllium hydroxide by using low-purity beryllium hydroxide, described low-purity beryllium hydroxide is to utilize high-grade beryllium ore or beryllium concentrate to be leached with high-concentration sulfuric acid, after the leaching solution removes impurities, then The product obtained by precipitation with ammonia water contains impurities in the low-purity beryllium hydroxide product, and the main components of the impurities are: SO 4 2- , Si, Al and Fe, among them, SO 4 2- The content of Si is 1.0-10.0%, the content of Si is 0.05-0.50%, the content of Al is 0.02-0.20%, and the content of Fe is 0.05-0.5%.

[0024] Beryllium hydroxide is an amphoteric hydroxide, which can react with both strong acid and strong base, but its solubility in water is very small, at 25°C, it is 2×10 -3 g / L, react it with strong alkali sodium hydroxide, and it can be fully dissolved under heating conditions. After dissolving, the i...

Embodiment 3

[0031] Embodiment 3, the method for preparing high-purity beryllium hydroxide by using low-purity beryllium hydroxide, described low-purity beryllium hydroxide is to utilize high-grade beryllium ore or beryllium concentrate to be leached with high-concentration sulfuric acid, after the leaching solution removes impurities, then The product obtained by precipitation with ammonia water contains impurities in the low-purity beryllium hydroxide product, and the main components of the impurities are: SO 4 2- , Si, Al and Fe, among them, SO 4 2-The content of Si is 1.0-10.0%, the content of Si is 0.05-0.50%, the content of Al is 0.02-0.20%, and the content of Fe is 0.05-0.5%.

[0032] Beryllium hydroxide is an amphoteric hydroxide, which can react with both strong acid and strong base, but its solubility in water is very small, at 25°C, it is 2×10 -3 g / L, react it with strong alkali sodium hydroxide, and it can be fully dissolved under heating conditions. After dissolving, the im...

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Abstract

The invention discloses a method for preparing high-purity beryllium hydroxide from low-purity beryllium hydroxide. According to the method, low-purity beryllium hydroxide is leached by high-concentration sulfuric acid from high-grade beryllium ore or beryllium concentrate, a leaching solution is subjected to impurity removal and precipitation by ammonium hydroxide, and a product is obtained; the low-purity beryllium hydroxide product contains impurities, and main components of the impurities include 1.0%-10.0% of SO4<2->, 0.05%-0.50% of Si, 0.02%-0.20% of Al and 0.05%-0.5% of Fe. Beryllium hydroxide is amphoteric hydroxide, can react with strong acid and strong base, but has low water solubility, the water solubility is 2*10<-3>g / L at the temperature of 25 DEG C, beryllium hydroxide can be sufficiently dissolved under the heating condition when reacting with strong base-sodium hydroxide, the impurities in beryllium hydroxide after dissolving are dissolved in a solution and are removed through hydrolysis, filtering and washing, and high-purity beryllium hydroxide is prepared accordingly.

Description

technical field [0001] The invention relates to the field of beryllium hydroxide production, in particular to a method for preparing high-purity beryllium hydroxide by using low-purity beryllium hydroxide. Background technique [0002] Among all metal elements, beryllium's unique stability makes it widely used in machinery manufacturing, aerospace, electronic production, ceramics, nuclear industry and many other fields. Especially in the application of nuclear energy, the new concept molten salt reactor is the only liquid fuel reactor among the six fourth-generation reactors. High-purity beryllium is the most important melting agent in nuclear power reaction thorium-based molten salt reactors. It is difficult for other metal elements to replace it in terms of thermal stability and elastic modulus. Most of the research on molten salt selection is focused on "FLiBe" molten salt. Lithium and beryllium are reasonable and effective moderators, and the melting point of the eutect...

Claims

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Application Information

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IPC IPC(8): C01F3/02
CPCC01F3/02C01P2006/80
Inventor 胡鄂明王清良李中冯志刚刘建东王俊董关羽
Owner NANHUA UNIV
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