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Method for determining content of neodymium fluoride and lithium fluoride in neodymium production electrolyte

A measurement method and electrolyte technology, which is applied in the field of electrolysis, can solve the problems of no chemical analysis, etc., and achieve the effect of fast analysis speed, high accuracy, and reliable analysis data

Active Publication Date: 2019-02-22
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the production enterprises of metal neodymium mainly rely on the experience of workers to judge the composition of the electrolyte, and have not carried out accurate chemical analysis.

Method used

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  • Method for determining content of neodymium fluoride and lithium fluoride in neodymium production electrolyte
  • Method for determining content of neodymium fluoride and lithium fluoride in neodymium production electrolyte

Examples

Experimental program
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Embodiment 1

[0030] This embodiment provides a method for determining the content of neodymium fluoride and lithium fluoride in the electrolyte for the production of neodymium, including the following steps.

[0031] (1) Pipette 0.00, 0.50, 1.00, 5.00, 10.00, 20.00, 50.00mL of neodymium standard solution into seven 100mL volumetric flasks respectively, and use a 5% nitric acid solution to set the volume to the mark, shake well, and The solution was introduced into an inductively coupled plasma emission spectrometer to obtain a standard working curve for neodymium.

[0032] (2) Pipette 0.00, 0.50, 1.00, 2.00, 5.00, 10.00mL lithium standard solution into six 100mL volumetric flasks, dilute to the mark with 5% nitric acid solution, shake well, and introduce the obtained solution into In the inductively coupled plasma optical emission spectrometer, the lithium standard working curve was obtained.

[0033] (3) According to the composition of neodymium production electrolyte, weigh 6g LiF (mass...

Embodiment 2

[0045] This embodiment provides a method for determining the content of neodymium fluoride and lithium fluoride in the electrolyte for the production of neodymium, including the following steps.

[0046] (1) Pipette 0.00, 0.50, 1.00, 5.00, 10.00, 20.00, 50.00mL of neodymium standard solution into seven 100mL volumetric flasks respectively, and use a 5% nitric acid solution to set the volume to the mark, shake well, and The solution was introduced into an inductively coupled plasma emission spectrometer to obtain a standard working curve for neodymium.

[0047] (2) Pipette 0.00, 0.50, 1.00, 2.00, 5.00, 10.00mL lithium standard solution into six 100mL volumetric flasks, dilute to the mark with 5% nitric acid solution, shake well, and introduce the obtained solution into In the inductively coupled plasma optical emission spectrometer, the lithium standard working curve was obtained.

[0048] (3) According to the composition of neodymium production electrolyte, weigh 6g LiF (mass...

Embodiment 3

[0060] This embodiment provides a method for determining the content of neodymium fluoride and lithium fluoride in the electrolyte for the production of neodymium, including the following steps.

[0061] (1) Pipette 0.00, 0.50, 1.00, 5.00, 10.00, 20.00, 50.00mL of neodymium standard solution into seven 100mL volumetric flasks respectively, and use a 5% nitric acid solution to set the volume to the mark, shake well, and The solution was introduced into an inductively coupled plasma emission spectrometer to obtain a standard working curve for neodymium.

[0062] (2) Pipette 0.00, 0.50, 1.00, 2.00, 5.00, 10.00mL lithium standard solution into six 100mL volumetric flasks, dilute to the mark with 5% nitric acid solution, shake well, and introduce the obtained solution into In the inductively coupled plasma optical emission spectrometer, the lithium standard working curve was obtained.

[0063] (3) According to the composition of neodymium production electrolyte, weigh 6g LiF (mass...

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Abstract

The invention relates to a method for determining the content of neodymium fluoride and lithium fluoride in neodymium production electrolyte. The method comprises the steps of making a lithium standard working curve and a neodymium standard working curve, preparing a soluble compound with neodymium production electrolyte, preparing a sample solution, and performing determination and analysis withan inductively coupled plasma emission spectrometer. The method adopting the inductively coupled plasma emission spectrometer to perform working curve comparison and automatic analysis and determination, has the advantages of wide linear detection range, high analysis speed, high accuracy and the like, automatically calibrates the standard working curves of lithium and neodymium solutions throughinstrument analysis software, enables linearly dependent coefficients of a sample and standard curves to be 99.99% and above and can quickly and reliably provide reliable data analysis.

Description

technical field [0001] The invention relates to the technical field of electrolysis, in particular to a method for determining the content of neodymium fluoride and lithium fluoride in an electrolyte for neodymium production. Background technique [0002] The electrolyte used in the industrial production of metallic neodymium is a mixture of neodymium fluoride and lithium fluoride. The initial mass percentage of the mixture is usually 10-20% lithium fluoride, and the rest is neodymium fluoride. But as electrolysis progresses, the composition of the electrolyte changes. Normally, the content of NdF2 in the electrolyte will decrease due to the reduction reaction of NdF2 in the electrolyte. This directly affects the solubility of neodymium oxide as a raw material in the electrolyte, which in turn affects the current efficiency. Since electrolysis is a continuous production process, the contents of NdF and LiF in the electrolyte need to be monitored. But at present, the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/73G01N1/28
CPCG01N1/28G01N21/73
Inventor 杨育圣兰超群赵增武孙鹤李保卫
Owner INNER MONGOLIA UNIV OF SCI & TECH
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