Technological method for rare earth fractional extraction and separation through adopting double feed inlets

A process method and the technology of two feed ports are applied in the field of separation and treatment of two kinds of rare earth feed liquids, which can solve the problems of large repeated construction investment, high consumption of chemical reagents, and low separation efficiency, so as to reduce the total investment and reduce the consumption of chemical reagents , The effect of reducing the amount of waste water discharge

Inactive Publication Date: 2013-12-04
NANCHANG HANGKONG UNIVERSITY
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  • Application Information

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Problems solved by technology

[0007] The above process (1) has the disadvantages of low separation efficiency, high consumption of chemical reagents, and high separation cost; the above process (2) has the disadvantages of large repeated construction investment, high consumption of chemical reagents, and high separation cost

Method used

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  • Technological method for rare earth fractional extraction and separation through adopting double feed inlets

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Experimental program
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Effect test

Embodiment 1

[0040] Separation of bastnaesite and ion-adsorption medium-yttrium-europium-rich rare earth ores by Nd / Sm grouping

[0041] (1) Rare earth liquid

[0042] The first rare earth feed solution is bastnaesite chloride aqueous solution, its rare earth concentration is 1.0M, pH value is 3, the mole fraction of light rare earth elements (including La~Nd) is 0.97, medium and heavy rare earth elements (including Sm ~Lu and Y) mole fraction is 0.03.

[0043] The second rare earth feed solution is an ion-adsorption type rare earth chloride aqueous solution of yttrium and europium-rich rare earth ore. The mole fraction of heavy rare earth elements (including Sm~Lu and Y) is 0.50.

[0044] The ratio of the feeding amount of the yttrium-europium-rich rare earth ore liquid to the bastnaesite liquid in the ion adsorption type is 1:5 (rare earth ion molar ratio).

[0045] (2) Organic phase

[0046] The organic phase is a kerosene solution of P507 with a concentration of 35% by volume. The...

Embodiment 2

[0056] Separation of bastnaesite and ion-adsorption medium-yttrium-europium-rich rare earth ores by Nd / Sm grouping

[0057] (1) Rare earth liquid

[0058] The first rare earth feed liquid is bastnaesite chloride aqueous solution, its rare earth concentration is 0.8M, pH range is 3.5, the mole fraction of light rare earth elements (including La~Nd) is 0.96, medium and heavy rare earth elements (including Sm ~Lu and Y) mole fraction is 0.04.

[0059] The second rare earth material liquid is rare earth chloride aqueous solution of ion-adsorption type rare earth ore, its rare earth concentration is 1.5M, pH value is 1, the mole fraction of light rare earth elements (including La~Nd) is 0.40, medium and heavy rare earth elements ( Including Sm~Lu and Y) the mole fraction is 0.60.

[0060] The ratio of the feed amount of the ion-adsorption type rare earth ore liquid to the bastnaesite feed liquid is 1:1 (rare earth ion molar ratio).

[0061] (2) Organic phase

[0062] The organic ...

Embodiment 3

[0072] Separation of bastnaesite and middle yttrium and europium-rich rare earth ores by Nd / Sm grouping

[0073] (1) Rare earth liquid

[0074] The first rare earth feed liquid is bastnaesite chloride aqueous solution, its rare earth concentration is 1.5M, pH value is 3, the molar fraction of light rare earth elements (including La~Nd) is 0.98, medium and heavy rare earth elements (including Sm ~Lu and Y) mole fraction is 0.02.

[0075] The second rare earth material liquid is rare earth chloride aqueous solution of ion-adsorption type rare earth ore, its rare earth concentration is 0.5M, pH value is 2, the molar fraction of light rare earth elements (including La~Nd) is 0.45, medium and heavy rare earth elements ( Including Sm~Lu and Y) the mole fraction is 0.55.

[0076] The ratio of the feeding amount of ion-adsorption type rare earth ore liquid to bastnaesite feed liquid is 1:3 (rare earth ion molar ratio).

[0077] (2) Organic phase

[0078] The organic phase is keros...

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Abstract

The invention discloses a technological method for rare earth fractional extraction and separation through adopting double feed inlets, which can be used for processing a misch metal liquid formed by two kinds of liquids with the same or similar rare earth elements and a certain difference in contents of rare earth elements, and particularly is realized through two technological schemes, namely, the bastnaesite and ionic adsorption type yttrium riched europium rare earth ore Nd / Sm grouped separation as well as high-yttrium misch metal and ionic adsorption type low-yttrium misch metal Y / non-Y separation. According to the method, a reagent with phosphorous or carboxylic acids is an extraction agent, kerosene or sulfonated kerosene is an organic solvent, and hydrochloric acid is a detergent; a double feed-inlet fractional extraction system includes an extraction section, a middle section and a washing section, and an organic phase enters the fractional extraction system from the first stage; the first kind of rare earth liquid enters the fractional extraction system from the joint of the extraction section and the middle section; the second kind of rear earth liquid enters the fractional extraction system from the joint of the middle section and the washing section; cleaning solution enters the fractional extraction system from the last stage. The technological method provided by the invention has the advantages of low consumption of chemical reagent, high product purity, low waste water quantity, low cost and the like.

Description

technical field [0001] The invention relates to a process method for fractionating, extracting and separating rare earths with two feed ports, in particular to a process method for separating and treating two kinds of rare earth feed liquids in the same fractionating extraction system. Background technique [0002] Rare earth elements have unique and superior physical and chemical properties such as light, electricity, magnetism, and heat. They have important uses in many fields such as industry, agriculture, and military affairs, and are an indispensable material basis for modern technology. [0003] There are more than 200 kinds of rare earth minerals. The content of rare earth elements in various rare earth ores varies greatly. For example, the content of light rare earth elements (La~Nd) in northern bastnaesite is about 97%, and the content of medium and heavy rare earth elements (Sm~Lu and Y) is about 3%; The content of light rare earth elements in europium rare earth...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/26
CPCY02P10/20
Inventor 钟学明吴少林吴跃辉
Owner NANCHANG HANGKONG UNIVERSITY
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