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Method for enriching europium in samarium-europium-gadolinium chloride solution

A chloride and solution technology, applied in the field of enriching europium, can solve the problems of high production cost, high price, high heat energy, etc., and achieve the effect of low cost, good reduction effect and simple operation

Active Publication Date: 2017-11-07
GUANGDONG INST OF RARE METALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods all need heating, consume a lot of heat energy, nitric acid and sodium carbonate are more expensive, and the production cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A samarium europium gadolinium chloride solution 100L, wherein [Eu 3+ ] Concentration is 50g / L, ΣREO is 300g / L, pH is 4.5, [Al 3+ ] Concentration is 1.2g / L. This solution is diluted into the solution that REO is 150g / L, by glacial acetic acid: samarium europium gadolinium chloride solution volume ratio 15:1000, glacial acetic acid is joined in the samarium europium gadolinium chloride solution, stirs 30 minutes, adjusts the pH value to 2 or so; at room temperature, according to magnesium sulfate: samarium europium gadolinium chloride solution mass ratio 15:100, magnesium sulfate is added in samarium europium gadolinium chloride solution, stirred for 60 minutes; then press zinc powder: samarium europium gadolinium chloride The mass ratio of europium in the solution is 2:1, add zinc powder for reduction, and stir for 120 minutes; finally filter to obtain europium-containing filter residue and samarium-gadolinium chloride filtrate; For allocating the above-mentioned sama...

Embodiment 2

[0020] A samarium europium gadolinium chloride solution 100L, wherein [Eu 3+ ] Concentration is 4g / L, ΣREO is 75g / L, pH is 3.0, [Al 3+ ] The concentration is 0.5g / L. This solution is diluted into the solution that REO is 70g / L, by glacial acetic acid: samarium europium gadolinium chloride solution volume ratio 5:1000, glacial acetic acid is joined in samarium europium gadolinium chloride solution, stirs 10 minutes, adjusts the pH value to 2 or so; at room temperature, according to magnesium sulfate: samarium europium gadolinium chloride solution mass ratio 5:100, magnesium sulfate is added in the samarium europium gadolinium chloride solution, stirred for 30 minutes; then zinc powder: samarium europium gadolinium chloride The mass ratio of europium in the solution is 0.5:1, adding zinc powder for reduction, stirring for 40 minutes; finally filtering to obtain europium-containing filter residue and samarium-containing gadolinium chloride filtrate; adopting a concentration of 0...

Embodiment 3

[0022] A samarium europium gadolinium chloride solution 100L, wherein [Eu 3+ ] Concentration is 20g / L, ΣREO is 150g / L, pH is 4.0, [Al 3+ ] Concentration is 1.5g / L. This solution is diluted into the solution that REO is 100g / L, by glacial acetic acid: samarium europium gadolinium chloride solution volume ratio 10:1000, glacial acetic acid is joined in samarium europium gadolinium chloride solution, stirs 20 minutes, adjusts the pH value to 2.5 or so; at room temperature, according to the mass ratio of magnesium sulfate: samarium europium gadolinium chloride solution 10:100, magnesium sulfate is added to the samarium europium gadolinium chloride solution and stirred for 40 minutes; then zinc powder: samarium europium gadolinium chloride The mass ratio of europium in the solution is 1:1, add zinc powder for reduction, and stir for 80 minutes; finally filter to obtain europium-containing filter residue and samarium-gadolinium chloride filtrate; Return to be used for allocating a...

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Abstract

A method for enriching europium in a samarium-europium-gadolinium chloride solution sequentially comprises the steps as follows: a solution with the REO being 70-150 g / L is prepared from the samarium-europium-gadolinium chloride solution, glacial acetic acid is added, the solution is stirred for 10-30 min, and the pH value is adjusted to range from 1.5 to 3; magnesium sulfate is added to the solution in step (1), and the solution is stirred for 30-60 min; then zinc powder is added, and the solution is stirred for 30-120 min; europium-containing filter residues and a samarium-gadolinium-chloride-containing filtrate are obtained through filtration, the europium-containing filter residues are washed with diluted hydrochloric acid with the concentration being 0.5-2 mol / L, and the washing water is used for preparing the samarium-europium-gadolinium chloride solution; a hydrochloric acid solution is added to the europium-containing filter residues in step (2), and the solution is stirred for 30-60 min; hydrogen peroxide is added, and the solution is stirred for 1-5 h; water being 0.5-4 times the addition amount of the hydrochloric acid solution is added for dilution; a tri-valent europium solution is obtained through stirring and filtration, and the filter residues are returned for decomposition treatment. With the method, the energy consumption is reduced, the method is easy to operate, and the cost is low.

Description

technical field [0001] The invention relates to a method for enriching europium from samarium europium gadolinium chloride solution. Background technique [0002] Europium is a good luminescent material activator, such as: Eu 3+ Is the activator of red luminescent material, Eu 2+ It is an activator for blue luminescent materials. Europium oxide is widely used as a luminescent material activator in LEDs, tricolor energy-saving lamps, high-definition display screens, and new X-ray medical diagnostic systems. At the same time, europium oxide can also be used in lasers, superconducting materials, magnetic bubble storage devices, control materials, shielding materials and structural materials of atomic reactors. Therefore, europium oxide has shown an extremely important position and role in the rapidly developing photoelectric new material technology. [0003] The purification process of producing high-purity europium oxide by alkalinity reduction method is mainly to use zinc...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B7/00
CPCC22B7/006C22B59/00Y02P10/20
Inventor 刘志强曹洪杨张魁芳朱薇郭秋松李伟高远陶进长金明亚
Owner GUANGDONG INST OF RARE METALS
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