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Separation method of La, Ce, Pr and Nd mixed rare earth ions

A mixed rare earth and separation method technology, applied in the direction of improving process efficiency, can solve problems such as low separation efficiency and complicated separation process, and achieve the effects of high rare earth purity, high extraction efficiency, simple and practical operation

Inactive Publication Date: 2015-11-18
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention will solve the technical problem that the separation process of La, Ce, Pr, Nd mixed rare earth ions is complex and the separation efficiency is low, so a method for separating La, Ce, Pr, Nd mixed rare earth ions is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1): Preparation of chromatographic column filler: Take 10g of N,N,N',N'-tetraoctyl-3-oxoglutaramide diluted with 20g of petroleum ether, take the diluted solution and 40g of diatoms after 50 mesh activation Mix the soil and stir evenly, after the petroleum ether volatilizes, dry it for later use;

[0021] (2): Filling the chromatographic column: Take 10g of the chromatographic column filler processed in step (1), directly put it into the chromatographic column with the eluent, and keep stirring to ensure that the chromatographic column filler is evenly filled into the chromatographic column , and rinse with eluent until the pH of the liquid flowing out of the chromatographic column is stable and balanced;

[0022] (3): Preparation of rare earth carrier filler: the extraction conditions are that the concentration of nitric acid in the aqueous phase solution is 5mol / L, and the total mixed rare earth ion concentration of La, Ce, Pr, and Nd is 0.01mol / L, wherein La, Ce, Pr...

Embodiment 2

[0025] (1): Preparation of chromatographic column packing: Take 10g of N,N,N',N'-tetraoctyl-3-oxoglutaramide diluted with 60g of kerosene, take the diluted solution and 60g of diatomite after 150 mesh activation Mix well, and after the kerosene volatilizes, dry it for later use;

[0026] (2): Fill the chromatographic column: take 10g of the chromatographic column filler processed in step (1), add deionized water to it, stir evenly to moisten it, and then pour it into the chromatographic column equipped with deionized water to fill evenly. And rinse with eluent until the pH of the liquid flowing out from the chromatographic column is stable and balanced;

[0027] (3): Preparation of rare earth carrier filler: the extraction conditions are that the concentration of nitric acid in the aqueous phase solution is 3mol / L, and the total mixed rare earth ion concentration of La, Ce, Pr, and Nd is 0.01mol / L, where La, Ce, Pr, and Nd The concentration of rare earth ions is 0.0025mol / L, ...

Embodiment 3

[0030] (1): Preparation of chromatographic column packing: Take 10g of N,N,N',N'-tetraoctyl-3-oxoglutaramide diluted with 30g of octane, take the diluted solution and 20g of activated diatoms at 300 mesh Mix the soil and stir well, after the octane volatilizes, dry it for later use;

[0031] (2): Filling the chromatographic column: Take 3.5g of the chromatographic column filler processed in step (1), add deionized water to it, stir well to moisten it, and then pour it into the chromatographic column filled with deionized water for even filling , and rinse with eluent until the pH of the liquid flowing out of the chromatographic column is stable and balanced;

[0032] (3): Preparation of rare earth carrier filler: the extraction conditions are that the concentration of nitric acid in the aqueous phase solution is 6mol / L, and the total mixed rare earth ion concentration of La, Ce, Pr, and Nd is 0.01mol / L, where La, Ce, Pr, and Nd The concentration of rare earth ions is 0.0025mo...

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Abstract

The invention provides a separation method of La, Ce, Pr and Nd mixed rare earth ions, which belongs to the field of separation and purification of rare earth. According to the separation method of the La, Ce, Pr and Nd mixed rare earth ions, which is provided by the invention, a chromatographic column which is prepared by utilizing N,N,N',N'-tetra octyl-3-oxa-pentanediamide is used for separating the mixed rare earth ions through leaching by using leacheate. The separation method of the mixed rare earth ions has the advantages of simplicity and practicability in operation, high extraction efficiency and no environmental pollution, the packing of the chromatographic column can be recycled, the purity of separated rare earth is high, and the requirement on the purity of single rare earth oxides in the current society can be satisfied.

Description

technical field [0001] The invention relates to the field of rare earth separation and purification, in particular to a method for separating La, Ce, Pr and Nd mixed rare earth ions. Background technique [0002] With the advancement of science and technology and the continuous breakthrough of application technology, the value of single rare earth oxide is increasing. Nowadays, rare earth has become an extremely important strategic resource. Rare earth elements have been widely used in petroleum, chemical industry, metallurgy, textile, ceramics, glass, permanent magnet materials and other fields. At present, the industrial separation method of rare earth is to use P204 and P205 for multiple extraction and separation, but the extraction efficiency is low, and the extraction result is not very ideal. In order to improve the process and improve the utilization efficiency of rare earth resources, a simple and efficient It is extremely necessary to separate a single rare earth e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B3/28
CPCY02P10/20
Inventor 弓爱君谢艳萍邱丽娜童璐潘裕红赵云波
Owner UNIV OF SCI & TECH BEIJING
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