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A method for selective step-by-step separation of tantalum and niobium based on planktonic extraction

A selective, tantalum-niobium technology, applied in the field of selective step-by-step separation of tantalum-niobium based on planktonic extraction, can solve difficult problems such as selective deep separation of tantalum-niobium

Active Publication Date: 2021-12-17
ZHENGZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the problems that the existing tantalum and niobium separation technology is difficult to realize the selective deep separation of tantalum and niobium, the purpose of the present invention is to provide a method for selectively separating tantalum and niobium based on floating extraction. The tantalum / niobate is deeply enriched, and for the tantalum and niobium components with a high enrichment ratio, the pH of the solution is adjusted and the niobium stripping agent and tantalum stripping agent are added respectively to obtain tantalum liquid and niobium liquid

Method used

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  • A method for selective step-by-step separation of tantalum and niobium based on planktonic extraction

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Embodiment 1

[0024] A method for the selective step-by-step separation of tantalum and niobium based on planktonic extraction, such as figure 1 As shown, the process is as follows:

[0025] (1) Add hydrofluoric acid with a concentration of 35wt%~40wt% to 1 L solution with a concentration of tantalate radicals of 5 g / L and a concentration of niobate radicals of 5 g / L, so that the tantalum and niobium in the solution are converted into tantalum fluoride and fluorine Niobate, control the free hydrofluoric acid in the solution to 1 wt% ~ 2 wt%. Add a floating extraction agent to the above solution, and its composition is: 50 parts by mass of dodecylamine, 30 parts by mass of methyl isobutyl ketone, 20 parts by mass of humic acid, the concentration is 10 g / L, and then add sodium hexametaphosphate to disperse The concentration is 200 mg / L, air is passed into the solution to form microbubbles with a diameter of 100 nm~10 μm, and the hydrophobic mineralized bubbles-fluorine tantalum / niobate-flota...

Embodiment 2

[0031] A method for the selective step-by-step separation of tantalum and niobium based on planktonic extraction, such as figure 1 As shown, the process is as follows:

[0032] (1) Add hydrofluoric acid with a concentration of 20wt% to 30wt% to 1L solution with a concentration of tantalate radicals of 2 g / L and a concentration of niobate radicals of 200 mg / L, so that the tantalum and niobium in the solution are converted into fluorotantalate and fluoroniobium Acid radicals, control the free hydrofluoric acid in the solution to 1 wt% ~ 2 wt%. Add a floating extraction agent to the above solution, which is composed of: 50 parts by mass of dodecylamine, 30 parts by mass of methyl isobutyl ketone, 20 parts by mass of humic acid with a concentration of 5 g / L, and then add sodium hexametaphosphate to disperse The concentration is 100 mg / L, the solution is filled with air to form microbubbles with a diameter of 100 nm~10 μm, and the hydrophobic mineralized bubbles-fluorine tantalum / ...

Embodiment 3

[0038] A method for the selective step-by-step separation of tantalum and niobium based on planktonic extraction, such as figure 1 As shown, the process is as follows:

[0039] (1) Add hydrofluoric acid with a concentration of 10wt% ~ 20wt% to 1 L solution with a concentration of tantalate radicals of 100 mg / L and a concentration of niobate radicals of 100 mg / L, so that the tantalum and niobium in the solution are converted into fluorotantalate radicals, fluorine Niobate, control the free hydrofluoric acid in the solution to 1 wt% ~ 2 wt%. Add a floating extraction agent to the above solution, and its composition is: 50 parts by mass of dodecylamine, 30 parts by mass of methyl isobutyl ketone, 20 parts by mass of humic acid, the concentration is 200 mg / L, and then add sodium hexametaphosphate to disperse The concentration is 50 mg / L, the solution is filled with air to form microbubbles with a diameter of 100 nm~10 μm, and the hydrophobic mineralized bubbles-fluorine tantalum / ...

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Abstract

The invention discloses a method for selectively separating tantalum and niobium based on floating extraction step by step. The method is to add hydrofluoric acid to a solution containing tantalum and niobium, so that the tantalum and niobium in the solution are converted into fluorotantalate and fluoroniobate, and then Add floating extraction agent and bubble dispersant to the above solution and pass air into it to form microbubbles, promote the hydrophobic mineralization of the bubbles to form fluoride tantalum / niobate-floating agent-bubble microdroplets, and finally enrich tantalum and niobium deeply through floating extraction Components; add pH adjuster and niobium stripping agent to the tantalum and niobium enrichment components, and obtain niobium liquid after stripping; then add pH adjusting agent and tantalum stripping agent to the above stripping raffinate, and Then get tantalum solution. The method has good selective separation effect on tantalum and niobium, simple process flow, low operating cost, effectively overcomes the shortcomings of multi-stage solvent extraction-back extraction, and is especially suitable for deep separation of tantalum and niobium.

Description

technical field [0001] The invention belongs to the technical field of hydrometallurgy, and in particular relates to a method for selectively separating tantalum and niobium in steps based on floating extraction. Background technique [0002] Tantalum and niobium are rarely distributed in the earth's crust. As important rare and precious metals, they have the characteristics of high melting point, good plasticity, and stable chemical properties. They are widely used in electronics, atomic energy, aerospace, medicine, steel, and hard alloys. Tantalum and niobium are located in the 5th and 6th periods of group VB of the periodic table, and are typical similar elements. They often coexist in niobite, pyrochlore and other minerals in nature. Due to the similar chemical properties of tantalum and niobium, the atomic radius is almost the same, so it is very difficult to separate tantalum and niobium. At present, the commonly used methods for the separation of dissolved tantalum a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/26C22B34/24B03D1/002B03D101/00B03D103/02
CPCC22B34/24B03D1/002B03D2201/005B03D2201/007B03D2203/02C22B3/402Y02P10/20
Inventor 韩桂洪刘兵兵黄艳芳苏盛鹏薛毓斌王益壮
Owner ZHENGZHOU UNIV
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