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Method for removing organic impurities in medium and heavy rare earth chloride solutions

A technology for organic impurities and heavy rare earths, applied in chemical instruments and methods, chemical/physical processes, and other chemical processes, can solve problems such as the inability to eliminate the enrichment of organic impurities, achieve the effect of ensuring adsorption capacity and enhancing the removal effect

Active Publication Date: 2019-10-08
BAOTOU RES INST OF RARE EARTHS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method directly extracts and separates the rare earth feed liquid, and the rare earth feed liquid has not been pretreated, which cannot eliminate the phenomenon of enrichment of organic impurities in the extraction tanks of the extraction section, washing section, and stripping section.

Method used

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  • Method for removing organic impurities in medium and heavy rare earth chloride solutions
  • Method for removing organic impurities in medium and heavy rare earth chloride solutions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A cross-linked styrene-divinylbenzene polymer was loaded into the resin column. The resin column had a diameter of 0.3 meters and a height of 3 meters.

[0051] will contain (TbDy)Cl 3 solution (organic impurity concentration is 30mg / L, hydrogen ion concentration is 0.8mol / L, (TbDy)Cl 3 The concentration is 1.2mol / L) at room temperature, according to the flow rate of 50L / h, the organic impurities are removed through the resin column to obtain (TbDy)Cl after the removal of impurities 3 solution. (TbDy)Cl after removal of impurities 3 See Table 2 for solution properties.

[0052] The impurity-removed (TbDy)Cl 3 Solution, 2-ethylhexyl phosphate mono-2-ethylhexyl ester and kerosene are mixed in the mixing chamber of the extraction section, and the organic phase and the water phase are separated in the extraction section; the organic phase obtained in the extraction section first enters the washing section, and the washing section The washing liquid used is water, and ...

Embodiment 2

[0054] A cross-linked styrene-divinylbenzene polymer was loaded into the resin column. The resin column had a diameter of 0.3 meters and a height of 3 meters.

[0055] will contain (Eu-Dy)Cl 3 solution (organic impurities concentration is 29.46mg / L, hydrogen ion concentration is 0.2mol / L, (Eu-Dy)Cl 3 The concentration is 1.5mol / L) at room temperature, according to the flow rate of 270L / h, the organic impurities are removed through the resin column, and the (Eu-Dy)Cl after the removal of impurities is obtained 3 solution. (Eu-Dy)Cl after removal of impurities 3 See Table 2 for solution properties.

[0056] The impurity-removed (Eu-Dy)Cl 3 Solution, 2-ethylhexyl phosphate mono-2-ethylhexyl ester and kerosene are mixed in the mixing chamber of the extraction section, and the organic phase and the water phase are separated in the extraction section; the organic phase obtained in the extraction section first enters the washing section, and the washing section The washing liqu...

Embodiment 3

[0058] A cross-linked styrene-divinylbenzene polymer was loaded into the resin column. The resin column had a diameter of 0.3 meters and a height of 3 meters.

[0059] will contain (EuGd)Cl 3 solution (organic impurity concentration is 10.18mg / L, hydrogen ion concentration is 0.15mol / L, (EuGd)Cl 3 The concentration is 1.5mol / L) at room temperature, according to the flow rate of 210L / h, the organic impurities are removed through the resin column, and the (EuGd)Cl after the removal of impurities is obtained 3 solution. (EuGd)Cl after removal of impurities 3 See Table 2 for solution properties.

[0060] The impurity-removed (EuGd)Cl 3 Solution, 2-ethylhexyl phosphate mono-2-ethylhexyl ester and kerosene are mixed in the mixing chamber of the extraction section, and the organic phase and the water phase are separated in the extraction section; the organic phase obtained in the extraction section first enters the washing section, and the washing section The washing liquid use...

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Abstract

The invention discloses a method for removing organic impurities in medium and heavy rare earth chloride solutions. The method comprises the following steps: (1), removing organic impurities in the medium and heavy rare earth chloride solutions obtained through extraction and separation processes so as to obtain the medium and heavy rare earth chloride solutions of which the impurities are removed; mixing the medium and heavy rare earth chloride solutions of which the impurities are removed, an extracting agent and a diluent, and separating an organic phase from a water phase at an extractionsection; and enabling the organic phase obtained at the extraction section to sequentially enter into a washing section and a reverse extraction section. According to the method disclosed by the invention, the enrichment phenomena of the organic impurities in extracting tanks at the extraction section, the washing section and the reverse extraction section can be effectively eliminated.

Description

technical field [0001] The invention relates to a method for removing organic impurities in a medium-heavy rare earth chloride solution. Background technique [0002] Medium-heavy rare earth resources are mainly distributed in my country, and no country in the world can match them in terms of the amount of resources, the types of elements and the distribution forms. Medium and heavy rare earth resources play an irreplaceable role for light rare earth and other materials in metallurgical foundry industry, luminescent materials, permanent magnet materials, environmental protection materials and other high-tech and cutting-edge scientific fields. [0003] Hydroxamic acid collectors are used in the production of rare earth concentrates. Under the action of high temperature or strong acid, hydroxamic acid will undergo rearrangement reaction to generate isocyanate or amine compounds. These organic impurities will enter the rare earth chloride solution, which will cause serious da...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/24C22B3/26C22B59/00B01D15/08B01J20/26
CPCB01D15/08B01J20/267C22B3/24C22B59/00C22B3/26Y02P10/20
Inventor 马莹郝先库张文娟郝一凡张瑞祥斯琴毕力格刘海旺王士智
Owner BAOTOU RES INST OF RARE EARTHS
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