Method for preparing high-purity lanthanum, high-purity cerium and high-purity praseodymium-neodymium

A high-purity, praseodymium and neodymium technology, applied in the direction of improving process efficiency, can solve the problems of low product purity and high acid-base consumption, and achieve high separation efficiency, reduced acid-base consumption, and high purity

Inactive Publication Date: 2019-10-08
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] A method for preparing high-purity lanthanum, high-purity cerium and high-purity neodymium praseodymium of the present invention aims at the traditional method of separating light rare earth mixture to prepare pure lanthanum, pure cerium and pure praseodymium neodymiu

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  • Method for preparing high-purity lanthanum, high-purity cerium and high-purity praseodymium-neodymium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The P507 organic phase is a sulfonated kerosene solution of the extractant P507, wherein the volume percentage of P507 is 30%, and the volume percentage of sulfonated kerosene is 70%.

[0027] The composition of the light rare earth chloride aqueous solution is: La 25.0g / L, Ce 54.0g / L, Pr 5.0g / L, Nd 17.0g / L, Sm 0.00050g / L.

[0028] 1) La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction separation system

[0029] The 2N lanthanum saponified P507 organic phase is used as the extracted organic phase, the light rare earth chloride aqueous solution is used as the feed solution, and 3.0mol / L HCl is used as the washing acid. The 2N lanthanum saponification P507 organic phase enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction and separation system from the first stage, and the light rare earth chloride aqueous solution enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction and separation system from the 57th stage...

Embodiment 2

[0038] The P507 organic phase is a sulfonated kerosene solution of the extractant P507, wherein the volume percentage of P507 is 30%, and the volume percentage of sulfonated kerosene is 70%.

[0039] The composition of the light rare earth chloride aqueous solution is: La 28.0g / L, Ce 51.0g / L, Pr 6.0g / L, Nd 16.0g / L, Sm 0.00080g / L.

[0040] 1) La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction separation system

[0041] The 2N lanthanum saponified P507 organic phase is used as the extracted organic phase, the light rare earth chloride aqueous solution is used as the feed solution, and 3.0mol / L HCl is used as the washing acid. The 2N lanthanum saponification P507 organic phase enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction and separation system from the first stage, and the light rare earth chloride aqueous solution enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction and separation system from the 57th stage...

Embodiment 3

[0050] The P507 organic phase is a sulfonated kerosene solution of the extractant P507, wherein the volume percentage of P507 is 30%, and the volume percentage of sulfonated kerosene is 70%.

[0051] The composition of the light rare earth chloride aqueous solution is: La 31.0g / L, Ce 48.0g / L, Pr 7.0g / L, Nd 15.0g / L, Sm 0.0010g / L.

[0052] 1) La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction separation system

[0053] The 2N lanthanum saponified P507 organic phase is used as the extracted organic phase, the light rare earth chloride aqueous solution is used as the feed solution, and 3.0mol / L HCl is used as the washing acid. The 2N lanthanum saponification P507 organic phase enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction separation system from the first stage, and the light rare earth chloride aqueous solution enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction separation system from the 59th stage, washing...

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Abstract

The invention discloses a method for preparing high-purity lanthanum, high-purity cerium and high-purity praseodymium-neodymium. The method is characterized in that a light rare-earth chloride aqueoussolution is taken as feed liquid, and P507 is taken as an extracting agent; and the method consists of three fractional extraction systems, which are separately a La/LaCe/CePrNd/PrNd four-outlet fractional extraction system, a La/Ce full-load two-charge-hole fractional extraction separation system and a Ce/PrNd two-charge-hole fractional extraction separation system. Three fractional extraction separation systems are combined to directly obtain three separated products of 5N-grade lanthanum chloride, 5N-grade cerium chloride and 4N-grade praseodymium-neodymium chloride. The method has the advantages of being high in product purity, high in rare-earth element yield, low in acid and alkaline consumption, short in process flow, low in separating cost, and the like.

Description

technical field [0001] The invention relates to a method for preparing high-purity lanthanum, high-purity cerium and high-purity praseodymium neodymium. Specifically, light rare earth chloride aqueous solution is used as the feed liquid, P507 is used as the extraction agent, and 5N grade chloride is directly obtained through the combination of fractional distillation extraction systems. Lanthanum, 5N grade cerium chloride and 4N grade praseodymium neodymium chloride are three products. The specific technical field of the invention is the preparation of high-purity lanthanum, high-purity cerium and high-purity praseodymium neodymium by fractional distillation extraction. Background technique [0002] Light rare earth (lanthanum cerium praseodymium neodymium) mixture can be obtained after bastnaesite is grouped by neodymium / samarium, and this light rare earth mixture is the main raw material for extracting pure lanthanum, pure cerium and pure praseodymium neodymium. The tradi...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B59/00
CPCC22B59/00C22B3/3844Y02P10/20
Inventor 钟学明刘俊辰
Owner NANCHANG HANGKONG UNIVERSITY
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