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Method for preparing high-purity samarium, high-purity europium and high-purity gadolinium

A high-purity, europium chloride technology, applied in the direction of improving process efficiency, can solve the problem of high consumption, and achieve the effects of reduced acid-base consumption, high separation efficiency and high yield

Inactive Publication Date: 2019-10-08
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] A method for preparing high-purity samarium, high-purity europium and high-purity gadolinium according to the present invention aims at the shortcomings of existing methods for separating samarium-europium-gadolinium concentrates that the highest product purity can only reach 4N level and high acid-base consumption, etc., and provides a method from Method for directly preparing 5N grade samarium chloride, 5N grade europium chloride and 5N grade gadolinium chloride in the rare earth chloride aqueous solution of samarium europium gadolinium enrichment

Method used

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  • Method for preparing high-purity samarium, high-purity europium and high-purity gadolinium

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Experimental program
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Effect test

Embodiment 1

[0024] The P507 organic phase is a sulfonated kerosene solution of the extractant P507, wherein the volume percentage of P507 is 30%, the volume percentage of secondary octanol is 10%, and the volume percentage of the sulfonated kerosene solution is 60%. When used, a general saponification method must be adopted to obtain the corresponding rare earth saponified organic phase after corresponding saponification.

[0025] The composition of the rare earth chloride aqueous solution of samarium europium gadolinium enrichment is: Nd 0.000010g / L, Sm 40.0g / L, Eu60.0g / L, Gd 50.0g / L, Tb 0.00005g / L.

[0026] 1) Sm / SmEu / EuGd / Gd four-outlet fractional distillation extraction separation system

[0027] The 2N samarium saponification P507 organic phase is used as the extraction organic phase, the rare earth chloride aqueous solution of the samarium europium gadolinium enrichment is used as the feed solution, and 3.0 mol / L HCl is used as the washing acid. The 2N samarium saponification P507 ...

Embodiment 2

[0036] The P507 organic phase is a sulfonated kerosene solution of the extractant P507, wherein the volume percentage of P507 is 30%, the volume percentage of secondary octanol is 10%, and the volume percentage of the sulfonated kerosene solution is 60%. When used, a general saponification method must be adopted to obtain the corresponding rare earth saponified organic phase after corresponding saponification.

[0037] The composition of the rare earth chloride aqueous solution of samarium europium gadolinium enrichment is: Nd 0.000050g / L, Sm 30.0g / L, Eu80.0g / L, Gd 40.0g / L, Tb 0.00010g / L.

[0038] 1) Sm / SmEu / EuGd / Gd four-outlet fractional distillation extraction separation system

[0039] The 2N samarium saponification P507 organic phase is used as the extraction organic phase, the rare earth chloride aqueous solution of the samarium europium gadolinium enrichment is used as the feed solution, and 3.0 mol / L HCl is used as the washing acid. The 2N samarium saponification P507 ...

Embodiment 3

[0048] The P507 organic phase is a sulfonated kerosene solution of the extractant P507, wherein the volume percentage of P507 is 30%, the volume percentage of secondary octanol is 10%, and the volume percentage of the sulfonated kerosene solution is 60%. When used, a general saponification method must be adopted to obtain the corresponding rare earth saponified organic phase after corresponding saponification.

[0049] The composition of the rare earth chloride aqueous solution of samarium europium gadolinium enrichment is: Nd 0.00010g / L, Sm 20.0g / L, Eu100.0g / L, Gd 30.0g / L, Tb 0.00020g / L.

[0050] 1) Sm / SmEu / EuGd / Gd four-outlet fractional distillation extraction separation system

[0051] The 2N samarium saponification P507 organic phase is used as the extraction organic phase, the rare earth chloride aqueous solution of the samarium europium gadolinium enrichment is used as the feed solution, and 3.0 mol / L HCl is used as the washing acid. The 2N samarium saponification P507 ...

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Abstract

The invention provides a method for preparing high-purity samarium, high-purity europium and high-purity gadolinium. The method comprises the steps that rare earth chloride aqueous solution of samarium-europium-gadolinium-enriched is used as a material liquid, P507 is an extracting agent, sec-octyl alcohol as a modifier. Three fractional extraction separation systems components are composed of a Sm / SmEu / EuGd / Gd four-outlet fractional extraction separation system, a Sm / Eu full-load two-feeding-port fractional extraction separation system and an Eu / Gd two-feeding-port fractional extraction separation system, and three separation products of 5N-grade samarium chloride and 5N-grade europium chloride and 5N-grade gadolinium chloride are directly obtained through combination of the three fractional extraction separation systems. The method has the advantages of high product purity, high rare earth element yield, less acid and alkali consumption, short technological process, low separation cost and the like.

Description

technical field [0001] The invention relates to a method for preparing high-purity samarium, high-purity europium and high-purity gadolinium. Specifically, a rare earth chloride aqueous solution of samarium europium-gadolinium enrichment is used as a feed solution, P507 is used as an extraction agent, and 2-octanol is used as a modifier. Realize the separation among the three elements of samarium, europium and gadolinium, and obtain three high-purity products of 5N grade samarium chloride, 5N grade europium chloride and 5N grade gadolinium chloride. The specific technical field of the invention is the preparation of high-purity samarium, high-purity europium and high-purity gadolinium by fractional distillation extraction. Background technique [0002] At present, 5N-grade samarium, 5N-grade europium and 5N-grade gadolinium have important uses in high-tech fields. The samarium europium gadolinium enrichment is one of the characteristic enrichments that must be produced in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/38C22B59/00
CPCC22B59/00C22B3/3844Y02P10/20
Inventor 钟学明徐玉娜
Owner NANCHANG HANGKONG UNIVERSITY
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