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Two-in and three-out fractional distillation extraction group separation method for yttrium-europium-rich ore

An extraction and exporting technology is applied in the field of a method for separating yttrium-rich europium ore in 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: 2016-08-24
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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  • Two-in and three-out fractional distillation extraction group separation method for yttrium-europium-rich ore

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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 method for separating middle yttrium and europium-rich ore by means of two-in and three-out fractional distillation and extraction group separation is to have 2 rare earth feed liquid inlets and 3 rare earth product solution outlets in a fractional distillation extraction system; The rare earth feed liquid is divided into two parts, and enters the fractionation extraction system at different feed inlets; the third outlet is set in the water phase of the extraction and washing section to obtain three products. Using P507 as the extraction agent, two-in and three-out fractional distillation extraction of medium yttrium and europium-rich rare earth ore ~ ​​Nd / Sm ~ Dy / Ho ~ group separation method, to obtain light rare earth element "La ~ Nd" products, heavy rare earth element "Ho ~ Lu+ Y" products and medium and heavy rare earth elements "Sm~Dy" enrichment products. Compared with the existing P507 extraction and washing section water phase three outlets~Nd / Sm~Dy / Ho~grouping separation process, the saponification alkali consumption of the present invention is reduced by 28% to 36%, and the washing acid consumption is reduced by 34% to 42%. ; The separation cost is low and the degree of greening 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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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/38C22B59/00
CPCY02P10/20
Inventor 钟学明
Owner NANCHANG HANGKONG UNIVERSITY