Method for separating highly-pure rare-earth oxide from low-yttrium middle-heavy rare earth mine

A technology of rare earth oxides and rare earth ores, applied in the field of hydrometallurgy, can solve problems such as high energy consumption, poisoning of extractants, and unstable quality

Inactive Publication Date: 2007-08-08
CHANGZHOU HUANAN CHEM +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] (3) The connection between processes and the problem of three wastes
The main problem is: the existing rare earth extraction and separation production process also has many problems, such as unstable quality, high cost, high energy consumption, "three wastes" treatment, "poisoning" of the extraction agent, etc.

Method used

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  • Method for separating highly-pure rare-earth oxide from low-yttrium middle-heavy rare earth mine
  • Method for separating highly-pure rare-earth oxide from low-yttrium middle-heavy rare earth mine
  • Method for separating highly-pure rare-earth oxide from low-yttrium middle-heavy rare earth mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Embodiment one (gap operation separation method)

[0070] Main equipment: stirring batching mixing kettle, probe type ultrasonic extraction equipment, flat-plate cationic membrane electrochemical reactor, stirring neutralization precipitation kettle and vacuum filtration solid-liquid separation device, etc.; stirring neutralization precipitation kettle and vacuum filtration solid-liquid separation device, Resistance furnace, pure water and pure acid equipment, analytical testing instruments, etc.

[0071] Main chemical raw materials: medium and heavy rare earth ores with low yttrium (the composition of raw materials is La 2 o 3 、Ce 2 o 3 、Pr 5 o 11 、Nd 2 o 3 、Sm 2 o 3 、Eu 2 o 3 、Gd 2 o 3 , Tb 4 o 7 、Dy 2 o 3 、Er 2 o 3 , higher mass fraction), hydrochloric acid, liquid ammonia, ammonium carbonate, ammonium bicarbonate, P507 extractant, P204 extractant, naphthenic acid extractant, etc.;

[0072] (1) batching mixing: in 1000ml stirred tank, add 450ml wa...

Embodiment 2

[0093] Embodiment two (continuous operation separation method)

[0094] Main equipment: Stirring batching mixing tank, tank type ultrasonic extraction equipment, fixed bed cationic membrane electrochemical reactor, stirring neutralization precipitation tank and vacuum filtration solid-liquid separation device, various pumps, motors, PVC board (for making extractor), Pond glass reaction tanks, resistance furnaces, pure water and pure acid equipment, analytical testing instruments, etc.

[0095] Main chemical raw materials: medium and heavy rare earth ores with low yttrium (the composition of raw materials is La 2 o 3 、Ce 2 o 3 、Pr 5 o 11 、Nd 2 o 3 、Sm 2 o 3 、Eu 2 o 3 、Gd 2 o 3 , Tb 4 o 7 、Dy 2 o 3 、Er 2 o 3 higher mass fraction), hydrochloric acid, liquid ammonia, ammonium carbonate, ammonium bicarbonate, P507 extractant, P204 extractant, naphthenic acid extractant, etc.

[0096] (1) batching mixing: in 1000ml stirred tank, add 450ml water, take the concentr...

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PUM

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Abstract

The invention discloses a full-separating method of high-purity rare earth oxide from low-yttrium middle-heavy rare earth rare earth ore, which is characterized by the following: producing La2O3, Ce2O3, Pr5O11, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb4O7, Dy2O3, Er2O3 and Y2O3 through ultrasonic extracting-electrochemical quantivalence-changing synthetic separating technique; fractionating; extracting.

Description

Technical field: [0001] The invention relates to a method for separating high-purity rare earth oxides from low-yttrium medium and heavy rare earth ores, belonging to the field of hydrometallurgy. Background technique: [0002] High-purity rare earth oxides are one of the important rare earth products, and the purity is generally 99.00% to 99.99% (such as La 2 o 3 ,Nd 2 o 3 , Eu 2 o 3 , Y 2 o 3 Wait). Due to the special physical and chemical properties of high-purity rare earth oxide products, they are widely used in industrial sectors and cutting-edge technology fields. As 99.99% La 2 o 3 Is an additive to advanced optical glass; more than 99% Nd 2 o 3 It is an important raw material for rare earth permanent magnet materials; 99.99% Eu 2 o 3 and Y 2 o 3 It is the main component of phosphors used in color TV and energy-saving lamps; more than 99.95% Tb 4 o 7 Is the activator of phosphor; more than 99% of Dy 2 o 3 As an additive of ChinFeB permanent magnet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/00C22B3/10C22B3/20C22B3/26C22B3/44C22B59/00
CPCY02P10/20
Inventor 许文林王雅琼魏晓廷朱金玉魏巍刘斌
Owner CHANGZHOU HUANAN CHEM
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