Method for extracting and separating rare earth elements in hydrochloric acid system

A separation method and technology of rare earth elements, applied in the field of extraction, can solve problems such as changes in the composition of the extractant, affecting the extraction effect of the system, and differences in solubility

Inactive Publication Date: 2013-01-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in this kind of mixed extraction system, there are differences in the solubility and other properties of each component

Method used

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  • Method for extracting and separating rare earth elements in hydrochloric acid system
  • Method for extracting and separating rare earth elements in hydrochloric acid system
  • Method for extracting and separating rare earth elements in hydrochloric acid system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Dissolve 5.6g, 0.10mol of potassium hydroxide in 56ml of ethanol to obtain an alcoholic solution of the alkali, add 40g of 0.1mol quaternary ammonium chloride 336 dropwise into the alcoholic solution of the above alkali, stir at room temperature for 1 hour, and filter out the chlorinated Potassium precipitates to obtain a clear ionic liquid [A336][OH]; add 0.08mol P507 to the obtained 0.1mol [A336][OH], stir at room temperature for 2 hours, take the upper organic phase of the ionic liquid, and wash it 3 times with deionized water , and then the solvent ethanol was recovered by distillation under reduced pressure, and the product was dried in vacuum to obtain [A336][P507].

Embodiment 2

[0050] Dissolve 5.6g, 0.10mol of potassium hydroxide in 56ml of ethanol to obtain an alcoholic solution of the alkali, add 40g of 0.1mol quaternary ammonium chloride 336 dropwise into the alcoholic solution of the above alkali, stir at room temperature for 1 hour, and filter out the chlorinated Potassium precipitates to obtain a clear ionic liquid [A336][OH]; add 0.08mol P204 to the obtained 0.1mol [A336][OH], stir at room temperature for 1 hour, take the upper organic phase of the ionic liquid, and wash it 3 times with deionized water , and then the solvent ethanol was recovered by distillation under reduced pressure, and the product was dried in vacuum to obtain [A336][P204].

Embodiment 3

[0052] [A336][P507] Extraction and separation of single rare earth ions.

[0053] Mix 1.0 mL of 0.05 mol / L [A336][P507] n-heptane solution with 5.0 mL of an aqueous solution containing NaCl and La(III), wherein the concentration of NaCl in the aqueous solution is 1.0 mol / L, and the concentration of La(III) is 7.5 ×10 -4 mol / L, after shaking at a constant temperature of 25°C for 1 h, measure the concentration of La(III) in the aqueous phase, and then calculate the extraction rate and distribution ratio of La(III).

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Abstract

The invention provides a method for extracting and separating rare earth elements in a hydrochloric acid system. The method includes the steps: taking mono (2-ethylhexyl) phosphonate 2-ethylhexyl methoxy cinnamate trialkyl methyl ammonium or phosphonate (2-ethylhexyl) diester trialkyl methyl ammonium as an extracting agent; taking normal heptane as diluent; and extracting the rare earth elements in rare earth chloride water solution into the normal heptane. The extracting agent used in the method does not need to be saponified, extraction and reverse extraction acidity is low, and separation coefficient for the rare earth elements is high.

Description

technical field [0001] The invention relates to the technical field of extraction, in particular to an extraction and separation method of rare earth elements in a hydrochloric acid system. Background technique [0002] Rare earth elements refer to the lanthanide elements with atomic number 57-71 and yttrium with atomic number 39. Today, rare earth elements are widely used in luminescent materials, electronic communications, magnetic materials, metallurgy, ceramics and other fields. And various rare earth elements are mixed in the mineral deposits, such as: bastnaesite, monazite, xenotime and oil shale. Therefore, in order to obtain a single rare earth element, the extraction and separation of rare earth elements has been widely studied and applied. Due to the similar physical and chemical properties of rare earth elements, it is difficult to separate them. The solvent extraction separation method has the advantages of large processing capacity, fast reaction speed, and g...

Claims

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Application Information

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IPC IPC(8): C22B3/40C22B59/00
CPCY02P10/20
Inventor 陈继郭琳邓岳锋兰景波
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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