A method for producing fluoroberyllic acid and ammonium fluoroberyllium from beryllium sulfate solution

A technology of beryllium sulfate and fluoroberyllic acid, which is applied in the direction of improving process efficiency, etc., can solve the problems of low direct yield and total yield in the production process, affecting the quality of beryllium beads, and removing impurities, etc., so as to improve the recovery rate, The effect of reducing production cost and stabilizing quality

Active Publication Date: 2019-08-27
HUNAN RES INST FOR NONFERROUS METALS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is long, the cost is high, the direct yield and the total yield of the production process are low, and the impurity removal will also affect the quality of beryllium beads

Method used

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  • A method for producing fluoroberyllic acid and ammonium fluoroberyllium from beryllium sulfate solution

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] This example provides a production method for extracting beryllium compounds and beryllium from a solution containing beryllium sulfate. The main components of the solution containing beryllium sulfate are (g / L) Be 5.43, Fe 3.76, Al 14.55, and Si 0.09. Include the following steps:

[0035] (1) Iron extraction

[0036] Use NaOH to adjust the pH value of the sulfuric acid solution to 1.2-2.0 as the iron extraction stock solution. The iron extraction agent is composed of 40-50% N-235 + 10-25% 2-octanol + 25-50% kerosene by volume percentage. The newly prepared iron extraction agent needs to be treated with 2N hydrochloric acid solution. Compared with O:A (organic phase: aqueous phase) = 1:1, the series is 5, contact time: stay in the mixing chamber for 5-10 minutes, the effect of iron removal can be 10% ammonium thiocyanate (or thiocyanate Potassium) to identify the effluent water phase until it is colorless or reddish. The iron stripping agent is 5% sulfuric acid solu...

Embodiment 2

[0046] The main components of the solution containing beryllium sulfate in this example are (g / L) Be 2.8, Fe 4.11, Al 12.75, and Si 1.05. The treatment method is the same as that of Example 1, the only difference is that the ratio of extracting beryllium in step (2) is adjusted to O / A=1.5:1, and the rest of the steps are the same.

Embodiment 3

[0048] The main components of the solution containing beryllium sulfate in this example are (g / L) Be 1.95, Fe 3.58, Al 13.8, Si1.12. The treatment method is the same as that in Example 1, except that the ratio of beryllium extraction in step (2) is adjusted to O / A=1:1, and the rest of the steps are the same.

[0049] The composition of the ammonium fluoroberyllium obtained according to Examples 1-3 is as follows: Be>7.0%, Fe<0.0045%, Al<0.003%, Si<0.001%, which can meet the quality requirements for producing high-purity beryllium beads . The recovery rate is increased by 8-10% compared with the existing technology.

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Abstract

The invention discloses a method for producing fluoroberyllium acid and ammonium fluoride beryllium from a beryllium sulfate-containing solution, comprising the following steps: (1) after adjusting the pH value of the beryllium sulfate-containing solution, extracting with an iron extracting agent to obtain extracted iron (2) extracting the post-iron solution with beryllium extraction agent to obtain the beryllium post-extraction solution and beryllium-carrying organic phase; (3) using a mixed solution of oxalic acid and sodium sulfite to extract the beryllium-carrying organic phase (4) back-extracting the washed organic phase with a hydrofluoric acid solution to obtain a fluoroberyllium acid solution; this method shortens the technological process of beryllium production and improves the recovery of beryllium rate, reduce production costs, and stabilize the quality of beryllium.

Description

technical field [0001] The invention relates to a method for producing fluoroberyllic acid and ammonium fluoroberyllium from a solution containing beryllium sulfate. Background technique [0002] Beryllium is an important strategic rare metal, which is widely used in military industry, aerospace, nuclear industry, precision high-precision instruments, optics and other fields. Due to its small atomic weight, small thermal neutron capture surface, high neutron scattering coefficient, and stable performance against radiation and high temperature, metal beryllium can be used as a neutron moderator and reflector in atomic energy reactors. In thermonuclear fusion reactors (ITER ) is used as the first wall of the shielding cladding facing the plasma in the design. [0003] At present, the production of metal beryllium is mainly obtained from the beryllium sulfate solution obtained after beryllium-containing ore smelting and acid leaching, through evaporation to remove aluminum, ne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B35/00C22B3/38
CPCC22B35/00C22B3/3846Y02P10/20
Inventor 雷湘吴海国郭庆牛磊黄彦强钟勇刘振楠刘景槐龚益
Owner HUNAN RES INST FOR NONFERROUS METALS
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