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Method for removing zinc from extraction solution and application of rare earth saponification wastewater

A technology for saponifying wastewater and extracting liquid of rare earth, which is applied in the field of zinc removal, and achieves the effects of good process stability, high industrial practical value and convenient industrial application.

Active Publication Date: 2021-11-30
INNER MONGOLIA UNIV OF SCI & TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method cannot separate zinc ions from rare earth ions

Method used

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  • Method for removing zinc from extraction solution and application of rare earth saponification wastewater
  • Method for removing zinc from extraction solution and application of rare earth saponification wastewater
  • Method for removing zinc from extraction solution and application of rare earth saponification wastewater

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Embodiment 1～3

[0091] The samarium europium gadolinium enrichment solution is reduced by using zinc powder to obtain the zinc-reduced samarium europium gadolinium enrichment solution. In the zinc-reduced samarium-europium-gadolinium enrichment solution, the reduction rate Eu 2+ / Eu 3+ ≥99%. The parameters of the samarium europium gadolinium enrichment solution are shown in Table 1.

[0092] Saponification stage: the organic phase is P 507 and kerosene mixture, P in the organic phase 507 The content is 1.5mol / L. The organic phase was contacted with aqueous ammonia having a concentration of 9 mol / L to obtain a saponified organic phase. The saponification method is continuous co-current.

[0093] Rare earth saponification section: Use part of the raffinate produced in the extraction section as a rare earth saponification agent, and contact the saponified organic phase with the rare earth saponification agent to obtain the rare earth saponification organic phase and rare earth saponificati...

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Abstract

The invention discloses a method for removing zinc from an extraction solution for extracting europium from zinc through reduction extraction. The method comprises the following steps: a saponification section, a rare earth saponification section, an extraction section, a washing section, a first reverse extraction section and a second reverse extraction section; and in the first reverse extraction section, at least one part of rare earth saponification wastewater from the rare earth saponification section serves as a first reverse extraction agent to be conveyed to the first reverse extraction section and makes contact with the washed extraction solution, and a first reverse extraction liquid and a first loaded organic phase are obtained. According to the method, the reverse extraction liquid enriched with Zn<2+> and trivalent rare earth ions such as Sm<3+> and Gd<3+> can be obtained respectively. The invention also provides an application of the rare earth saponification wastewater in removing zinc from the extraction solution for extracting europium from zinc through reduction extraction.

Description

technical field [0001] The invention relates to a method for removing zinc from an extract solution for extracting europium by zinc reduction extraction and the application of rare earth saponification wastewater. Background technique [0002] Europium oxide (Eu 2 o 3 ) is mainly used in the manufacture of fluorescent materials, laser materials, shielding materials and structural materials, etc., and it can also be used as a raw material for the synthesis of other europium compounds. With the development of science and technology, europium oxide will show its importance in the field of special-purpose materials. At present, the main process of domestic high-purity europium oxide production process is: adding zinc powder to the europium-enriched solution to dilute Eu 3+ reduced to Eu 2+ , the zinc powder transforms into Zn 2+ Into the rare earth solution, containing Zn 2+ The rare earth solution of the reduction extraction is used as the feed liquid of the reduction ext...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/04B01D11/00C01G43/01
CPCC02F9/00B01D11/00C01G43/01C01G43/003C02F2101/20C02F1/008C02F1/26C02F2301/08C01P2006/80Y02P10/20
Inventor 杨启山马莹杨叶平刘赟赵清元李占明杨卉王延铭丁艳蓉赵小杨江道宽付东磊
Owner INNER MONGOLIA UNIV OF SCI & TECH
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