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Method for two-in and three-out fractional extraction and group separation of europium-rich middle yttrium ore

An extraction and exporting technology is applied in the field of a method for separating yttrium-rich europium ore into groups, which can solve the problem of high acid-base consumption, and achieve the effects of improving the degree of greening and reducing the volume.

Inactive Publication Date: 2015-04-22
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the acid and alkali consumption of the existing medium-yttrium-europium-rich rare earth ore-Nd / Sm-Dy / Ho-group separation process is relatively high

Method used

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  • Method for two-in and three-out fractional extraction and group separation of europium-rich middle yttrium ore

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Rare earth liquid

[0024] The first medium yttrium-europium-rich ore rare earth chloride aqueous solution has a rare earth concentration of 1.0 M and a pH value of 3; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0025] The second rare earth chloride aqueous solution of yttrium and europium-rich ore has a rare earth concentration of 1.0 M and a pH value of 2; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0026] In terms of the molar ratio of rare earth ions, the ratio of the feeding amount of the first rare earth feed liquid to the second rare earth feed liquid is 3:1.

[0027] 2) Organic phase

[0028] The organic phase is the kerosene solution of P507, and the concentration of P507 ...

Embodiment 2

[0039] 1) Rare earth liquid

[0040] The first medium yttrium-europium-rich ore rare earth chloride aqueous solution has a rare earth concentration of 1.5 M and a pH value of 5; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0041] In the second part, the rare earth chloride aqueous solution of yttrium and europium-rich ore has a rare earth concentration of 0.5 M and a pH value of 1; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.50, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.35.

[0042] In terms of the molar ratio of rare earth ions, the feed ratio of the first rare earth feed liquid to the second rare earth feed liquid is 2:1.

[0043] 2) Organic phase

[0044] The sulfonated kerosene solution of the organic phase P507, the volume percentage conc...

Embodiment 3

[0055] 1) Rare earth liquid

[0056] The first medium yttrium-europium-rich ore rare earth chloride aqueous solution has a rare earth concentration of 0.5 M and a pH value of 4; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.60, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.25.

[0057] The second part of the rare earth chloride aqueous solution of yttrium and europium-rich ore has a rare earth concentration of 1.5 M and a pH value of 2; in terms of rare earth elements, the molar fraction of light rare earth elements La to Nd is 0.55, and the molar fraction of Sm to Dy is 0.15 , the mole fraction of Ho~Lu and Y is 0.30.

[0058] In terms of the molar ratio of rare earth ions, the feed ratio of the first rare earth feed liquid to the second rare earth feed liquid is 1:1.

[0059] 2) Organic phase

[0060] The organic phase is the kerosene solution of P507, and the concentration of P507 is 45...

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Abstract

The invention discloses a method for two-in and three-out fractional extraction and group separation of europium-rich middle yttrium ore. Two rare-earth feed liquid feeding holes and three rare-earth product solution outlets are formed in a fractional extraction system; chlorinated rare-earth feed liquid of the europium-rich middle yttrium ore is divided into two parts, and is fed to the fractional extraction system from different feeding holes; a third outlet is formed in a water phase of an extraction eluting section, so as to obtain three products; P507 is used as an extracting agent; light rare-earth elements 'La-Nd' products, heavy rare-earth elements 'Ho-Lu+Y' products and medium rare-earth 'Sm-Dy' enriched products are obtained by adopting the method for two-in and three-out fractional extraction and group separation of europium-rich middle yttrium ore Nd / Sm-Dy / Ho. Compared with an existing process for group separation of Nd / Sm-Dy / Ho at three water outlets in the water phase of the P507 extraction eluting section, the method has the advantages that the saponification alkali consumption is reduced by 28%-36%; the acid consumption of the washing acid is reduced by 34%-42%; the separation cost is low; and the green degree is high.

Description

technical field [0001] The present invention relates to a method for the separation of yttrium and europium-rich ore in two-in and three-out fractional distillation extraction groupings, in particular to a method in which two rare earth feed liquid inlets and three rare earth product solution outlets are provided in the same fractional distillation extraction system, and the two –Ethylhexylphosphonic acid mono-2-ethylhexyl ester (usually abbreviated as P507) as extraction agent, medium yttrium and europium-rich ore rare earth chloride solution as rare earth feed liquid, ~Nd / Sm~Dy / Ho~group separation of medium yttrium The invention relates to a process method for chlorinating mixed rare earth feed solution of europium-rich ore. The invention belongs to the field of solvent extraction in hydrometallurgy. Background technique [0002] Rare earth elements are the important material basis of modern high technology. Due to similar chemical properties, rare earth elements are oft...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B59/00
CPCY02P10/20
Inventor 钟学明
Owner NANCHANG HANGKONG UNIVERSITY
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