Method for separating highly-pure rare-earth oxide from yttrium-rich rare earth mine

A rare earth oxide, yttrium-rich rare earth technology, applied in the direction of improving process efficiency, etc.

Inactive Publication Date: 2007-08-08
常州市西南化工研究所 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current literature shows that yttrium-rich rare earth ore (high yttrium heavy rare earth type, medium yttrium heavy rare earth type or yttrium hydrochloric acid enriched body fluid, etc.) Resources, high-efficiency and complete separation of rare earth elemen

Method used

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  • Method for separating highly-pure rare-earth oxide from yttrium-rich rare earth mine
  • Method for separating highly-pure rare-earth oxide from yttrium-rich rare earth mine
  • Method for separating highly-pure rare-earth oxide from yttrium-rich rare earth mine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment one (gap operation separation method)

[0049] 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.

[0050] Main chemical raw materials: yttrium-rich rare earth ore, hydrochloric acid, liquid ammonia, ammonium carbonate, ammonium bicarbonate, P507 extractant, P204 extractant, naphthenic acid extractant, etc.;

[0051] (1) Ingredients mixing: add hydrochloric acid or an aqueous solution containing hydrochloric acid and rare earth elements during the rare earth separation process in the stirring tank, then add yttrium-rich rare earth ore, and remove non-rare earth element impu...

Embodiment 2

[0106] Embodiment two (continuous operation separation method)

[0107] Main equipment: trough ultrasonic extraction equipment, fixed bed cationic membrane electrochemical reactor, stirring neutralization precipitation kettle and vacuum filtration solid-liquid separation device, various pumps, motors, PVC board (for making extractor), pond glass reaction tank, Resistance furnace, pure water and pure acid equipment, analytical testing instruments, etc.

[0108] Main chemical raw materials: yttrium-rich rare earth ores (La 2 o 3 、Ce 2 o 3 、Pr 5 o 11 、Nd 2 o 3 、8m 2 o 3 、Eu 2 o 3 、Gd 2 o 3 , Tb 4 o 7 、Dy 2 o 3 、Er 2 o 3 , Y 2 o 3 higher mass fraction), hydrochloric acid, liquid ammonia, ammonium carbonate, ammonium bicarbonate, P507 extractant, P204 extractant, naphthenic acid extractant, etc.;

[0109] (1) Ingredients mixing: add hydrochloric acid or an aqueous solution containing hydrochloric acid and rare earth elements during the rare earth separation pr...

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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: adopting enriched yttrium rare earth ore as raw material; producing high-purity Y2O3, La2O3, Ce2O3, Pr5O11, Nd2O3, Sm2O3, Eu2O3, Gd2O3, Tb4O7, Dy2O3, Er2O3 and Y2O3 through ultrasonic extracting-electrochemical, quantivalence-changing and chemical coupling technique; obtaining the product.

Description

Technical field: [0001] The invention relates to a method for separating high-purity rare earth oxides from yttrium-rich rare earth ores. Background technique: [0002] Yttrium (atomic number 39) and lanthanides (atomic number 57-71) coexist in nature, and their chemical properties are very similar, making it difficult to separate them. At present, the hydrometallurgical process for purifying yttrium mainly uses liquid-liquid extraction technology, and the extraction systems used are different. Japan (Japanese patent 74-54261) uses naphthenic acid to enrich yttrium in the water phase (the grade of yttrium is increased from 62% to 93.1%), and the rare earth in the organic phase contains 1.5% yttrium, and then di(2-ethylhexyl ) phosphoric acid to extract pure yttrium from the yttrium-rich aqueous phase. Japan (Japanese patent 79-80222) uses bis(2-ethylhexyl)phosphoric acid as an extractant to extract grouped rare earths from mixed rare earth chlorides of crude yttrium contai...

Claims

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Application Information

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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赵红坤
Owner 常州市西南化工研究所
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