Method for grouping high-yttrium rare earth ore and separating yttrium oxide

A technology of rare earth ore and yttrium oxide, which is applied in the fields of rare earth metal compounds, chemical instruments and methods, and inorganic chemistry, and can solve problems such as separation difficulties, affecting process stability, and small separation coefficient of lanthanum and yttrium

Active Publication Date: 2019-07-12
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, industrial practice shows that there are some problems in this process: because naphthenic acid is a by-product of petroleum processing, it has a complex composition and high water solubility, and the composition changes after long-term use, which affects the stability of the process; , prone to emulsification; affected by raw material composition and

Method used

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  • Method for grouping high-yttrium rare earth ore and separating yttrium oxide
  • Method for grouping high-yttrium rare earth ore and separating yttrium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Step 1: The high-yttrium type rare earth ore liquid is grouped with erbium and thulium in a 1.0mol / L P507-20% isooctyl alcohol mixed system, and the degree of saponification is 36%. The organic phase is back-extracted with 5mol / L hydrochloric acid, and the raffinate aqueous phase is La ~Er Y component (yttrium-rich material), the organic phase is TmYb Lu component (thulium ytterbium lutetium enrichment). Thulium, ytterbium and lutetium concentrates are separated by a 1.0mol / L P507-20% isooctyl alcohol mixed system to separate a single heavy rare earth, and 5N lutetium oxide, 3N thulium oxide, and 5N ytterbium oxide can be obtained.

[0047] Step 2: The yttrium-rich feed solution is directly extracted and separated from yttrium oxide with a 0.50mol / L CA12-10%TBP mixed system, the degree of saponification is 80%, the organic phase is back-extracted with 3mol / L hydrochloric acid, and the raffinate aqueous phase is the Y component. The organic phase is La-Er components, and...

Embodiment 2

[0050] Step 1: The high yttrium-type rare earth ore liquid is grouped with 0.5mol / L P507-0.5mol / L Cyanex272 mixed system erbium and thulium, the degree of saponification is 36%, the organic phase is back-extracted with 3.5mol / L hydrochloric acid, and the raffinate aqueous phase is La~Er Y component (yttrium-rich material), the organic phase is Tm Yb Lu component (thulium, ytterbium and lutetium enrichment). Thulium, ytterbium and lutetium concentrates are separated by a 0.5mol / L P507-0.5mol / L Cyanex272 mixed system to separate single heavy rare earths, and 4N lutetium oxide, 4N thulium oxide, and 4N ytterbium oxide can be obtained.

[0051] Step 2: Use 0.8mol / L CA12-20% TBP mixed system to directly extract and separate yttrium oxide from the yttrium-rich feed solution, the degree of saponification is 90%, the organic phase is back-extracted with 3.0mol / L hydrochloric acid, and the raffinate aqueous phase is the Y component , the organic phase is La-Er components, and the raffi...

Embodiment 3

[0054] Step 1: The high-yttrium type rare earth ore liquid is grouped with 0.5mol / L P507-0.5mol / L P227 mixed system erbium and thulium, the degree of saponification is 36%, the organic phase is back-extracted with 3mol / L hydrochloric acid, and the raffinate aqueous phase is La ~Er Y component (yttrium-rich material), the organic phase is Tm Yb Lu component (thulium ytterbium lutetium enrichment). The thulium, ytterbium and lutetium concentrates are separated by a 0.5mol / L P507-0.5mol / L P227 mixed system to separate a single heavy rare earth, and 5N lutetium oxide, 4N thulium oxide, and 4N ytterbium oxide can be obtained.

[0055] Step 2: Use 0.8mol / L CA100-20% TBP mixed system to directly extract and separate yttrium oxide from the yttrium-rich feed solution, the degree of saponification is 90%, the organic phase is back-extracted with 3.0mol / L hydrochloric acid, and the raffinate aqueous phase is the Y component , the organic phase is La-Er components, and the raffinate aqueo...

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Abstract

The invention relates to a method for grouping high-yttrium rare earth ore and separating yttrium oxide, and belongs to the technical field of rare earth extraction separation. The problem of restriction of industrial application by naphthenic acid replacement needed in the long-term process flow of separation of yttrium oxide from an existing naphthenic acid system and HAB mixed system and the problem of difficulty in rapid onsite analysis of the change of the concentrations of two extractants in the HAB system is solved. The system comprises the following steps: grouping erbium and thulium by a P507-isooctyl alcohol mixed system to obtain a high-yttrium concentrate and a thulium-ytterbium-lutetium concentrate, separating the high-yttrium concentrate and the thulium-ytterbium-lutetium concentrate to prepare lutetium oxide and other heavy rare earths, separating the high-yttrium concentrate by a carboxylic acid extractant HA-TBP mixed system to prepare yttrium oxide, and grouping the La to Er concentrate by adopting a P507 system to separate other single rare earth elements. The grouping and separating method has the advantages of advanced and reasonable process, short process flow, low production cost, strong adaptability, and easiness in operation control, has better comprehensive, technological and economic indicators than the naphthenic acid technology, and has practical application values.

Description

technical field [0001] The invention belongs to the technical field of rare earth extraction and separation, and in particular relates to a method for grouping and separating yttrium oxide from high-yttrium type rare earth ores. Background technique [0002] Southern ionic rare earth ores have a complete distribution, mainly medium and heavy rare earths, rich in europium, terbium, dysprosium, erbium, lutetium, yttrium and other medium and heavy rare earth elements required for functional materials. They are unique strategic resources in my country. Ion-type ores are mainly distributed in Jiangxi, Fujian, Guangdong, Hunan and Guangxi provinces in southern my country. According to the distribution characteristics of rare earth ores, they can be divided into light rare earth type, medium yttrium rich europium type and high yttrium type (also known as heavy rare earth type). type). The content of heavy rare earths in high-yttrium rare earth ores is about 90%, of which the conten...

Claims

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Application Information

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IPC IPC(8): C01F17/00C22B3/38C22B3/40C22B59/00
CPCC22B59/00C22B3/408C22B3/409C01F17/10C01F17/206Y02P10/20
Inventor 陈继邓岳锋李德谦杨茂华白彦常永青
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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