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Method for extracting rare earth element with N-octylpyridinium tetrafluoroborate

A technology of octylpyridine tetrafluoroborate and rare earth elements, which is applied in the field of extracting rare earth elements with N-octylpyridine tetrafluoroborate, can solve the problems of large acid-base consumption and environmental impact, and achieve equilibrium in a short time , cost saving, simple extraction operation process

Inactive Publication Date: 2018-12-14
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above technical problems, the present invention provides a method for extracting rare earth elements using N-octylpyridinium tetrafluoroborate, aiming at the consumption of a large amount of acid and alkali and a large amount of volatile toxic solvents in the separation process of the solvent extraction method, and the harm to the environment. serious impact problem

Method used

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  • Method for extracting rare earth element with N-octylpyridinium tetrafluoroborate
  • Method for extracting rare earth element with N-octylpyridinium tetrafluoroborate

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Embodiment 1

[0030] In this embodiment, the method for extracting rare earth elements using N-octylpyridine tetrafluoroborate is carried out according to the following steps:

[0031] (1) to contain La 3+ The rare earth chloride solution is the raw material solution, and the La in the raw material solution 3+ The concentration is 0.01mol / L, and the acidity is 0.3mol / L;

[0032] (2) Mix and extract the raw material solution and N-octylpyridine tetrafluoroborate in a shaker, the mixing ratio O / A is 2:1, the rotation speed during the extraction process is 500r / min, and the extraction time is 5min. The extraction temperature is 25°C. After the extraction is completed, the mixed solution is centrifuged to obtain the rare earth-loaded organic phase and raffinate. The centrifugal speed of centrifugation is 1000r / min, and the centrifugation time is 8min. La in the raffinate is measured. 3+ concentration, the extraction rate was 85.2%;

[0033] (3) Use a stripping agent to strip the loaded rare ...

Embodiment 2

[0035] The present embodiment adopts the method for extracting rare earth elements by N-octylpyridine tetrafluoroborate to carry out according to the following steps:

[0036] (1) to contain Ce 3+ The rare earth chloride solution is the raw material solution, and Ce in the raw material solution 3+ The concentration is 0.01mol / L, and the acidity is 0.4mol / L;

[0037] (2) The raw material liquid and N-octylpyridine tetrafluoroborate are mixed and extracted in a shaker, the mixing ratio O / A is 1:2, the rotation speed during the extraction process is 800r / min, and the extraction time is 20min. The extraction temperature is 25°C. After the extraction is completed, the mixed solution is centrifuged to obtain the rare earth-loaded organic phase and raffinate. The centrifugal speed of centrifugation is 2000r / min, the centrifugation time is 10min, and the Ce in the raffinate is determined. 3+ concentration, the extraction rate was 82.7%;

[0038] (3) Use a stripping agent to carry o...

Embodiment 3

[0040] In this embodiment, the method for extracting rare earth elements using N-octylpyridine tetrafluoroborate is carried out according to the following steps:

[0041] (1) to contain Pr 3+ The rare earth nitrate solution is the raw material solution, and the Pr in the raw material solution 3+ The concentration is 0.05mol / L, and the acidity is 0.5mol / L;

[0042](2)) Mix and extract the raw material liquid and N-octylpyridine tetrafluoroborate in a shaker, the mixing ratio O / A is 1:1, the rotation speed during the extraction process is 1000r / min, and the extraction time is 30min , the extraction temperature is 35°C, the mixed solution after the extraction is centrifuged to obtain the rare earth-loaded organic phase and the raffinate, the centrifugation speed is 1500r / min, the centrifugation time is 15min, and the Pr 3+ concentration, the extraction rate was 88.1%;

[0043] (3) Use a stripping agent to strip the loaded rare earth organic phase. The stripping agent is 0.09mo...

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Abstract

The invention belongs to the field of rare earth hydrometallurgy and the field of ionic liquid extraction, and particularly relates to a method for extracting a rare earth element with N-octylpyridinium tetrafluoroborate. According to the method, an aqueous solution containing a light rare earth element is used as the feed solution, the acid feed solution is mixed with the N-octylpyridinium tetrafluoroborate to conduct liquid-liquid extraction, and the mixed solution obtained after extraction is subjected to centrifugal separation so that an organic phase loaded with rare earth and raffinate can be obtained. A back washing agent is adopted to reversely extract the organic phase loaded with the rare earth, and the mixed solution obtained after reverse extraction is subjected to centrifugalseparation to obtain a pure rare earth solution and recycled ionic liquid. By adoption of the method, extraction efficiency is high, extraction equilibrium time is short, no emulsion phenomenon exists, and operation is easy. Moreover, the N-octylpyridinium tetrafluoroborate has hydrophobicity and cannot be dissolved with the aqueous solution, and thus organic phase losses caused by aqueous phase entrainment or dissolution can be reduced.

Description

technical field [0001] The invention belongs to the fields of rare earth hydrometallurgy and ionic liquid extraction, and specifically relates to a method for extracting rare earth elements by using N-octylpyridine tetrafluoroborate. Background technique [0002] Rare earth elements are a general term for 17 elements including lanthanide elements with atomic numbers from 51 to 71, scandium and yttrium. Rare earth elements have unique physical and chemical properties, and trace addition can greatly improve the quality and performance of products. They are widely used in high-tech fields such as information technology, biotechnology, and energy technology, as well as basic industries such as chemical industry, agriculture, and manufacturing. Among them, lanthanum (La), cerium (Ce), praseodymium (Pu), neodymium (Nd) and other light rare earth elements have high content and wide application range, and play an important role in the field of rare earth applications. [0003] At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B59/00
CPCC22B59/00C22B3/37Y02P10/20
Inventor 李勇张冬恒赵曼任利聪张培谭龙飞张文彬邵震
Owner NORTHEASTERN UNIV
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