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Process for preparing high-purity lanthanum by extraction method

An extraction method, an extraction technology, is applied in the separation of metal impurity elements, and in the technical field of preparation of high-purity lanthanum by this extraction method, which can solve the problems of high cost, complicated process, and many processes, and achieve low reagent consumption, high purity, and high yield. high rate effect

Inactive Publication Date: 2018-11-27
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the preparation of existing 5N-level lanthanum products has many processes, complex processes, and high costs.

Method used

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  • Process for preparing high-purity lanthanum by extraction method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] P204-TBP organic phase: the sulfonated kerosene solution of extractant P204 and TBP, wherein the volume percentage of P204 is 30%, the volume percentage of TBP is 15%, and the volume percentage of sulfonated kerosene solution is 55%.

[0032] Lanthanum chloride feed solution: 3N industrial grade lanthanum chloride aqueous solution, its composition is Na 0.020g / L, Mg 0.020g / L, Ca0.050g / L, Ba 0.020g / L, Pb 0.010g / L, Zn 0.020g / L, La 145.0g / L, Ce 0.080g / L, Pr 0.030g / L, Nd 0.010g / L, Al 0.010g / L, Sm 0.010g / L, Fe 0.010g / L.

[0033] Step 1: Fractional distillation and extraction to separate NaMgCaBaPbZnLa / LaCePrNdAlSmFe

[0034] The P204-TBP organic phase enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractionation extraction system from the first stage, the lanthanum chloride feed liquid enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractionation extraction system from the 12th stage, and the 1.5mol / L HCl washing acid enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractionation extraction syst...

Embodiment 2

[0045] P204-TBP organic phase: the sulfonated kerosene solution of extractant P204 and TBP, wherein the volume percentage of P204 is 30%, the volume percentage of TBP is 15%, and the volume percentage of sulfonated kerosene solution is 55%.

[0046] Lanthanum chloride feed solution: 3N industrial grade lanthanum chloride aqueous solution, its composition is Na 0.012g / L, Mg 0.010g / L, Ca0.030g / L, Ba 0.010g / L, Pb 0.0050g / L, Zn 0.010g / L, La 140.0g / L, Ce 0.050g / L, Pr 0.020g / L, Nd 0.0080g / L, Al 0.0080g / L, Sm 0.0070g / L, Fe 0.0070g / L.

[0047] Step 1: Fractional distillation and extraction to separate NaMgCaBaPbZnLa / LaCePrNdAlSmFe

[0048] The P204-TBP organic phase enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractional distillation extraction system from the first stage, the lanthanum chloride feed liquid enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractional extraction system from the 12th stage, and the 1.5mol / L HCl washing acid enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractionation extra...

Embodiment 3

[0059] P204-TBP organic phase: the sulfonated kerosene solution of extractant P204 and TBP, wherein the volume percentage of P204 is 30%, the volume percentage of TBP is 15%, and the volume percentage of sulfonated kerosene solution is 55%.

[0060] Lanthanum chloride feed solution: 3N industrial grade lanthanum chloride aqueous solution, its composition is Na 0.0050g / L, Mg 0.0050g / L, Ca0.010g / L, Ba 0.0050g / L, Pb 0.0020g / L, Zn 0.0050g / L, La 135.0g / L, Ce 0.020g / L, Pr 0.010g / L, Nd 0.0050g / L, Al 0.0050g / L, Sm 0.0050g / L, Fe 0.0050g / L.

[0061] Step 1: Fractional distillation and extraction to separate NaMgCaBaPbZnLa / LaCePrNdAlSmFe

[0062] The P204-TBP organic phase enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractionation extraction system from the first stage, the lanthanum chloride feed liquid enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractionation extraction system from the 12th stage, and the 1.5mol / L HCl washing acid enters the NaMgCaBaPbZnLa / LaCePrNdAlSmFe fractionation extrac...

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Abstract

The invention discloses a process for preparing high-purity lanthanum by an extraction method. The process comprises five steps: by adoption of a 3N industrial-grade lanthanum chloride aqueous solution as a feed liquid and adoption of P204-TBP as a composite extraction agent, specific fractionating and extracting separation of NaMgCaBaPbZnLa / LaCePrNdAlSmFe, fractionating and extracting separationof NaMgCaBaPbZn / La and fractionating and extracting separation of La / CePrNdAlSmFe as well as a reverse extraction stage 1 and a reverse extraction stage 2. By implementation of the process, the separation of lanthanum from metallic elements such as cerium, praseodymium, neodymium, samarium, iron, aluminium, zinc, lead, barium, calcium, magnesium and sodium and the like can be realized smoothly, and the relative purity of the high-purity lanthanum chloride solution is 99.9991%-99.9998%. The process disclosed by the invention has the characteristics of short process flow, low reagent consumption, low production cost, high purity of lanthanum chloride and high yield of lanthanum and the like.

Description

technical field [0001] The invention relates to a process for preparing high-purity lanthanum by an extraction method. Specifically, 3N industrial-grade lanthanum chloride aqueous solution is used as a feed liquid, P204-TBP is used as a composite extraction agent, and the fractional distillation extraction process realizes the target element lanthanum and cerium, praseodymium, neodymium, and samarium. , iron, aluminum, zinc, lead, barium, calcium, magnesium, sodium and other metal impurity elements, and prepare lanthanum chloride with a relative purity of 99.9991% to 99.9998%. The invention belongs to the technical field of preparing high-purity lanthanum chloride by a fractional distillation extraction method. Background technique [0002] With the development of science and technology, the demand for high-purity lanthanum products is increasing. Lanthanum chloride with a purity of ≥99.999% is not only an important high-purity lanthanum product, but also one of the basic r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B59/00C22B3/38
CPCC22B59/00C22B3/408Y02P10/20
Inventor 钟学明李艳容徐玉娜
Owner NANCHANG HANGKONG UNIVERSITY
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