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A method for preparing high-purity lanthanum, high-purity cerium and high-purity praseodymium neodymium

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

Inactive Publication Date: 2021-02-05
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • 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 neodymium, which has the disadvantages of low product purity and high acid-base consumption Insufficient, provide efficient separation of light rare earth mixtures, and directly obtain 5N grade lanthanum chloride, 5N grade cerium chloride and 4N grade praseodymium neodymium chloride

Method used

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

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Experimental program
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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 relevant rare earth ion concentrations in the light rare earth chloride aqueous solution are: La 25.0g / L, Ce 54.0g / L, Pr5.0g / 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 grade lanthanum saponified P507 organic phase is used as the extracted organic phase, the light rare earth chloride aqueous solution is used as the feed liquid, and 3.0mol / L HCl is used as the washing acid. The 2N-grade 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 solution enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction and separati...

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 relevant rare earth ion concentrations in the light rare earth chloride aqueous solution are: La 28.0g / L, Ce 51.0g / L, Pr6.0g / 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 grade lanthanum saponified P507 organic phase is used as the extracted organic phase, the light rare earth chloride aqueous solution is used as the feed liquid, and 3.0mol / L HCl is used as the washing acid. The 2N-grade 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 solution enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction and separati...

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 relevant rare earth ion concentrations in the light rare earth chloride aqueous solution are: La 31.0g / L, Ce 48.0g / L, Pr7.0g / 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 grade lanthanum saponified P507 organic phase is used as the extracted organic phase, the light rare earth chloride aqueous solution is used as the feed liquid, and 3.0mol / L HCl is used as the washing acid. The 2N-grade 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 solution enters the La / LaCe / CePrNd / PrNd four-outlet fractional distillation extraction and separatio...

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Abstract

A kind of method for preparing high-purity lanthanum, high-purity cerium and high-purity praseodymium neodymium of the present invention takes light rare earth chloride aqueous solution as feed liquid, and P507 is extraction agent; It is made up of three fractionation extraction systems, respectively La / LaCe / CePrNd / PrNd four-outlet fractional extraction and separation system, La / Ce fully loaded two-inlet fractional extraction and separation system and Ce / PrNd two-inlet fractional extraction and separation system. Through the combination of three fractional distillation extraction separation systems, three separated products of 5N grade lanthanum chloride, 5N grade cerium chloride and 4N grade praseodymium neodymium chloride are directly obtained. The invention has the advantages of high product purity, high yield of rare earth elements, low acid-base consumption, short process flow, low separation 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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Patent Type & Authority Patents(China)
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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