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Method for extracting vanadium from acidic solution by using ionic liquid [OMIM]BF4

An ionic liquid and acid solution technology, applied in vanadium hydrometallurgy and ionic liquid extraction fields, can solve the problems of environmental pollution, energy consumption, strong toxicity, volatilization of organic solvents, etc., and achieves reduction of organic phase loss, simple operation, and mild operating conditions. Effect

Active Publication Date: 2016-10-26
NORTHEASTERN UNIV
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Problems solved by technology

[0005] Aiming at the problems of organic solvent volatilization, strong toxicity, environmental pollution and high energy consumption caused by the use of traditional extractants in the process of extracting vanadium by the existing solvent extraction method, the purpose of the present invention is to provide a method using ionic liquid [OMIM]BF 4 The method for extracting vanadium in acidic solution, the purpose is to take advantage of the hydrophobicity, non-volatility and stable chemical properties of ionic liquids, and use ionic liquids as extraction agents to transfer vanadium from acidic solutions to ionic liquids through liquid-liquid extraction. In the process, through centrifugal separation, the extraction of vanadium from the acidic solution is realized, which is an energy-saving, efficient and pollution-free vanadium extraction method

Method used

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  • Method for extracting vanadium from acidic solution by using ionic liquid [OMIM]BF4
  • Method for extracting vanadium from acidic solution by using ionic liquid [OMIM]BF4
  • Method for extracting vanadium from acidic solution by using ionic liquid [OMIM]BF4

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Embodiment 1

[0029] The present embodiment utilizes ionic liquid [OMIM] BF 4 The method for extracting vanadium in acid solution is carried out according to the following steps:

[0030] (1) Add hydrogen peroxide to the vanadium-containing solution obtained in the process of extracting vanadium from vanadium-containing minerals, so that the low-valent vanadium in it is oxidized to pentavalent vanadium, the concentration of pentavalent vanadium is 0.2g / L, and the pH is adjusted to 2. Obtain a vanadium-containing acidic solution;

[0031] (2) Mix vanadium-containing acidic solution with ionic liquid [OMIM]BF 4 Mix in an oscillator for liquid-liquid extraction, the ratio A / O of the mixture is 5:1, the rotation speed during the liquid-liquid extraction process is 200r / min, the extraction time is 2min, the extraction temperature is 25°C, and the mixture obtained after the extraction is completed The solution is centrifuged to obtain the organic phase and raffinate loaded with vanadium. The ro...

Embodiment 2

[0034] The present embodiment utilizes ionic liquid [OMIM] BF 4 The method for extracting vanadium in acid solution is carried out according to the following steps:

[0035] (1) Add sodium hypochlorite to the vanadium-containing solution obtained in the process of extracting vanadium from vanadium-containing minerals, so that the low-valent vanadium in it is oxidized to pentavalent vanadium, the concentration of pentavalent vanadium is 0.5g / L, and the pH is adjusted to 3.1, obtain vanadium-containing acidic solution;

[0036] (2) Mix vanadium-containing acidic solution with ionic liquid [OMIM]BF 4 Mix in an oscillator for liquid-liquid extraction, the ratio A / O of the mixture is 5:2, the rotation speed during the liquid-liquid extraction process is 300r / min, the extraction time is 5min, the extraction temperature is 35°C, and the mixture obtained after the extraction is completed The solution was centrifuged to obtain the organic phase and raffinate loaded with vanadium. The...

Embodiment 3

[0039] The present embodiment utilizes ionic liquid [OMIM] BF 4 The method for extracting vanadium in acid solution is carried out according to the following steps:

[0040] (1) Add sodium perchlorate to the vanadium-containing solution obtained in the process of extracting vanadium from vanadium-containing minerals, so that the low-valent vanadium in it is oxidized to pentavalent vanadium, and the concentration of pentavalent vanadium is 0.8g / L. Adjust the pH to 5.4 to obtain a vanadium-containing acidic solution;

[0041](2) Mix vanadium-containing acidic solution with ionic liquid [OMIM]BF 4 Mix in an oscillator for liquid-liquid extraction, the ratio A / O of the mixture is 5:3, the rotation speed during the liquid-liquid extraction process is 400r / min, the extraction time is 10min, the extraction temperature is 45°C, and the mixture obtained after the extraction is completed The solution was centrifuged to obtain the organic phase and raffinate loaded with vanadium. The r...

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Abstract

The invention belongs to the technical field of vanadium hydrometallurgy and ionic liquid extraction, and particularly relates to a method for extracting vanadium from an acidic solution by using an ionic liquid [OMIM]BF4. According to the present invention, an oxidant is added into a vanadium-containing solution obtained from the vanadium extraction process of a vanadium-containing mineral to make the low-valent vanadium be oxidized into the pentavalent vanadium so as to obtain a vanadium-containing acidic solution, the vanadium-containing acidic solution and an ionic liquid are mixed, liquid-liquid extraction is performed, the mixing solution obtained after the completion of the extraction is subjected to centrifugal separation to obtain a vanadium-bearing organic phase and a raffinate, the vanadium-bearing organic phase is subjected to back extraction with a back extraction agent, and the mixed solution obtained after the completion of the back extraction is subjected to centrifugal separation to obtain the pure vanadium solution and the recovered ionic liquid; and the method has characteristics of high extraction efficiency, short equilibrium time, rapid layering after extraction, no emulsification phenomenon, and simple operation, wherein the ionic liquid is hydrophobic and is substantially immiscible with water so as to reduce the organic phase loss due to the water phase entrainment or dissolution.

Description

technical field [0001] The invention belongs to the field of vanadium hydrometallurgy and the technical field of ionic liquid extraction, and specifically relates to a method of using ionic liquid [OMIM]BF 4 A method for extracting vanadium in acidic solution. Background technique [0002] Vanadium is an important strategic resource. Due to its excellent physical and chemical properties, it is known as "industrial monosodium glutamate" and "industrial vitamin". It is widely used in metallurgy, electronics, chemical industry, medicine, aerospace and other fields. At present, the raw materials for extracting vanadium are mainly steel slag, vanadium-titanium magnetite and stone coal produced in the smelting process of vanadium-containing minerals. The industrial vanadium extraction process mainly goes through the hydrometallurgical process, and the activation-leaching method is adopted. Representative activation methods include sodium roasting, oxidation roasting, calcificatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B34/22
CPCC22B34/22
Inventor 李勇何金桂薛向欣魏君怡
Owner NORTHEASTERN UNIV
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