Method for removing aluminum from rare earth feed liquid through complexing-cloud point extraction

A technology of rare earth material liquid and cloud point, which is applied in the fields of materials, hydrometallurgy, and chemistry

Active Publication Date: 2021-09-10
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for removing aluminum from the rare earth material liquid by complexation-cloud point extraction. The present invention aims at the problem of difficult separation of rare earth and aluminum in the

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  • Method for removing aluminum from rare earth feed liquid through complexing-cloud point extraction

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Experimental program
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specific Embodiment 1

[0029] (1) Rare earth hydrochloric acid leaching solution: aluminum content 3.036g / L, rare earth content 5g / L, solution pH=0.5.

[0030] (2) Pipette 50mL of rare earth leaching solution into a 300mL conical flask, put it into a magnetic stirring constant temperature water bath, weigh 2.482g of glutamic acid, stir at a constant temperature at 40°C, and slowly add it to the conical flask. Slowly adjust the pH of the rare earth solution to 4.5 with ammonia-ammonium chloride buffer solution, continue to stir for 20 minutes, then add 10mL Triton X-114, keep the temperature at 40°C and stir for 10 minutes, then extract and separate phases, equilibrate for 10 minutes, extract and separate phases to obtain an aluminum-containing organic phase And the rare earth solution after removing aluminum, through the above operations, the primary extraction rate of aluminum is 78.01%, and the extraction rate of rare earth is 5.09%, realizing the separation of rare earth and aluminum.

specific Embodiment 2

[0032] (1) Rare earth hydrochloric acid leaching solution: aluminum content 1.745g / L, rare earth content 0.1g / L, solution pH=0.5.

[0033] (2) Pipette 50mL of rare earth leaching solution into a 300mL conical flask and put it into a magnetic stirring constant temperature water bath, weigh 1.4263g of glutamic acid, stir at a constant temperature at 40°C and slowly add it to the conical flask, and add it after the feeding is completed and stirred evenly Slowly adjust the pH of the rare earth solution to 4.5 with ammonia-ammonium chloride buffer solution, continue to stir for 20 minutes, add 10 mL of Triton X-114, keep the temperature at 35°C and stir for 10 minutes, then extract and separate phases. The equilibration time was 15 minutes, and the extraction and phase separation were carried out to obtain the aluminum-containing organic phase and the rare earth solution after removing aluminum. Through the above operations, the primary extraction rate of aluminum was 78.85%, and th...

specific Embodiment 3

[0035] (1) Rare earth hydrochloric acid leaching solution: aluminum content 3.036g / L, rare earth content 50g / L, solution pH=0.5.

[0036](2) Pipette 50mL of rare earth leaching solution into a 300mL conical flask and put it into a magnetically stirred constant temperature water bath, weigh 2.617g of histidine, stir at a constant temperature at 40°C and slowly add it to the conical flask, and add it after the feeding is completed and stirred evenly Slowly adjust the pH of the rare earth solution to 4.5 with ammonia-ammonium chloride buffer solution, continue to stir for 20 minutes, then add 10 mL of Triton X-114, keep the temperature at 50°C and stir for 10 minutes, then extract and separate phases. Equilibrium time is 20 minutes, extraction and phase separation are carried out to obtain an aluminum-containing organic phase and a rare earth solution after removing aluminum. Through the above operations, the primary extraction rate of aluminum is 70.85%, and the extraction rate o...

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Abstract

The invention discloses a method for removing aluminum from rare earth feed liquid through complexing-cloud point extraction. The method comprises the following steps of carrying out complexing pretreatment on aluminum-containing rare earth feed liquid by adopting glutamic acid and histidine, and carrying out extraction separation on aluminum ions in the rare earth feed liquid by utilizing a cloud point extraction method, so that the aluminum ions are removed from the rare earth feed liquid. A selective complexing-cloud point extraction aluminum removal method can ensure that the one-time extraction rate of the aluminum ions reaches 70% or above, the rare earth extraction rate does not exceed 6%, the concentration of the aluminum ions in the rare earth feed liquid is greatly reduced, and conditions are created for subsequent preparation of high-purity rare earth products. Compared with the prior art, the method has novelty, an extracting agent can be recycled through reverse extraction, the influence on the environment is reduced, and the treatment cost is reduced.

Description

technical field [0001] The invention relates to the technical fields of hydrometallurgy, chemistry and materials, in particular to a method for removing aluminum from rare earth material liquid by complexation-cloud point extraction. Background technique [0002] Rare earth elements (REEs) are the general term for a total of 17 elements including 15 lanthanide elements in the periodic table of chemical elements plus scandium and yttrium. REEs are known as "universal soil" and "industrial vitamins" because of their special and extensive uses. They are widely used in rare earth permanent magnet materials, rare earth luminescent materials, rare earth chemical catalysts, alloys and glass ceramics and other industries. Electrolyte leaching ion adsorption type rare earth ore will cause impurity ions (such as iron, aluminum, etc.) to leach into the leach solution. The existence of these impurity ions will affect the quality of rare earth products in the rare earth precipitation a...

Claims

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Application Information

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IPC IPC(8): C22B3/10C22B3/26C22B21/00C22B59/00
CPCC22B3/10C22B59/00C22B21/0015Y02P10/20
Inventor 李金辉高阳徐志峰王瑞祥刘晋彪温耀儒刘文新褚宇航
Owner JIANGXI UNIV OF SCI & TECH
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