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Preparation method of high-purity single rare earth

A production method and high-purity technology, applied in the field of extraction and separation of mixed rare earths to produce high-purity single rare earths, to achieve the effects of optimizing process flow, improving product quality and reducing production costs

Active Publication Date: 2007-07-04
BAOTOU HUAMEI RE PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The problem to be solved in the present invention is to provide a preparation method with less consumption of acid and alkali materials, low cost, simple operation and suitable for industrial production in view of the disadvantages of the existing high-purity single rare earth preparation method

Method used

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  • Preparation method of high-purity single rare earth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) With 1.5MP507 (ammonia saponification 0.54M) as the extraction agent, the mixed rare earth chloride solution in Baotou and the south as the raw material (REO270g / L), 4.5M HCl as the washing liquid and the reverse liquid, and carry out Nd / Sm separated. Obtain raffinate as (LaCePrNd)Cl 3 solution (REO260g / L) and medium-to-heavy rare earth enrichment (Eu 2 o 3 ~10%) of the organic phase, the organic phase was back-extracted with 4.5M HCl to obtain a medium-heavy rare earth enrichment (Eu 2 o 3 ~10%) chloride solution;

[0015] (2) With the raffinate that (1) obtains as raw material, adopt extractant, lotion in (1), carry out Ce / Pr separation by 60 stages of fractional distillation extraction, obtain the organic phase (REO 0.18M / Pr) containing Pr, Nd L) and containing (LaCe)Cl 3 Raffinate (REO~250g / L);

[0016] (3) Containing (LaCe)Cl obtained in (2) 3 The raffinate is used as the raw material, using the same extractant and lotion as in (1), through 50-stage fr...

Embodiment 2

[0021] (1) The SmEuGd heavy rare earth enrichment solution obtained after step (1) stripping in Example 1 is used as a raw material, 1.5MP507 (ammoniated 0.54M) is an extraction agent, and 4.5M HCl is a lotion, extracted by fractional distillation Gd / Tb separation is carried out to obtain heavy rare earth-containing organic phase (REO 0.18M / L) and SmEuGd chloride (Eu 2 o 3 10%) solution;

[0022] (2) Using the SmEuGd chloride (Eu 2 o 3 10%) solution as raw material, 1.5MP507 (0.54M ammoniation) and 4.5M HCl as eluent, Sm / Eu separation is carried out by fractional extraction to obtain SmCl-containing 3 (Sm 2 o 3 ~250g / L) solution and EuGd-containing organic phase (REO 0.18M / L);

[0023] (3) adopt the heavy rare earth organic phase solution (REO 0.18M / L) that obtains in (1) to be raw material, the organic phase that contains Tb obtained in (4) is extractant, and 4.5MHCl is washing liquid, anti-liquid, by Fractional distillation extraction, Tb / Dy separation, TbCl 3soluti...

Embodiment 3

[0027] (1) the chloride solution containing Dy, Ho, Er, Tm, Yb, Lu, Y that step (3) in the embodiment 2 obtains is raw material, with 1.5MP507 (saponification 0.54M) as extraction agent, 4.5MHCl is Washing liquid, reverse liquid, Ho / Er separation by 45-stage fractional distillation extraction to obtain (DyHo)Cl-containing 3 Solution and organic phase containing Er, Tm, Yb, Lu, Y (REO 0.18M / L);

[0028] (2) Containing (DyHo)Cl obtained by (1) 3 The solution is used as the raw material, and the same extractant and lotion as in (1) are used to extract by 55-stage fractional distillation, and the Dy / Ho is separated to obtain the DyCl-containing 3 (REO~250g / L) solution and Ho-containing organic phase (REO 0.18M / L);

[0029] (3) the organic phase containing Er, Tm, Yb, Lu, Y that obtains with (1) is raw material, and 4.5MHCl is washing liquid, reverse liquid, obtains containing Er organic phase in (4) and is extraction agent, carries out 45 Fractional distillation extraction, Er / ...

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Abstract

The method to extract and separate mixed rare earth for high-pure and single product comprises: taking counter-current displacement and extraction to the Ce-contained organic phase and some PrCl3-contained solution with parameters as 20-50 stages and the ratio between organic phase and water as 5-10 to obtain the CeCl3-contained solution E and Pr-contained organic phase; depositing, filtering, and igniting to obtain the 99.9-99.995% high-pure product with La2O3, CeO2, Pr6O11 and Nd2O3 and the enriched middle-heavy rare-earth with Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu and Y. This invention reduce whole acid and base consumption more than 37%, improves product quality and stability, and fit to industrial production.

Description

1. Technical field [0001] The invention belongs to the field of rare earth smelting, in particular to a method for extracting and separating mixed rare earths to produce high-purity single rare earths. 2. Background technology [0002] High-purity single rare earth products can be used in phosphors, automobile exhaust purification catalysts, electrode materials for fuel cells, and other fields. However, in recent years, the price of raw materials has been rising, and users have higher and higher requirements for the quality of single rare earth products. The profit margins of high-purity single rare earth production enterprises are decreasing day by day, and they are operating in a state of capital preservation or loss, which seriously affects the sustainable development of rare earth production enterprises. There is an urgent need to adopt an efficient and economical new process method to transform the existing production line. [0003] The method of preparing high-purity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/46
CPCY02P10/20
Inventor 马永茂叶祖光
Owner BAOTOU HUAMEI RE PRODS