A method for preparing high-purity samarium, high-purity europium and high-purity gadolinium

A high-purity europium chloride technology, which is applied in the field of high-purity europium and high-purity gadolinium to prepare high-purity samarium, can solve the problem of high consumption and achieve the effects of reduced acid and alkali consumption, high separation efficiency and high yield

Inactive Publication Date: 2021-01-01
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 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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  • A 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 grade samarium saponification P507 organic phase is used as the extraction organic phase, the samarium europium gadolinium enriched rare earth chloride aqueous solution is used as the feed solution, and 3.0mol / L HCl is used as the washing acid. The 2N-grade samarium saponification P50...

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 grade samarium saponification P507 organic phase is used as the extraction organic phase, the samarium europium gadolinium enriched rare earth chloride aqueous solution is used as the feed solution, and 3.0mol / L HCl is used as the washing acid. The 2N-grade samarium saponification P50...

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 grade samarium saponification P507 organic phase is used as the extraction organic phase, the samarium europium gadolinium enriched rare earth chloride aqueous solution is used as the feed solution, and 3.0mol / L HCl is used as the washing acid. The 2N-grade samarium saponification P50...

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Abstract

The invention discloses a method for preparing high-purity samarium, high-purity europium and high-purity gadolinium. The rare earth chloride aqueous solution of samarium europium-gadolinium enrichment is used as feed solution, P507 is used as extraction agent, and 2-octanol is used as modifier. It is composed of Sm / SmEu / EuGd / Gd four-outlet fractionation extraction separation system, Sm / Eu full load two-inlet fractionation extraction separation system and Eu / Gd two-inlet fractionation extraction separation system; through the combination of three fractionation extraction separation systems , and directly obtain three separated products of 5N-grade samarium chloride, 5N-grade europium chloride and 5N-grade gadolinium chloride. The invention has the advantages of high product purity, high yield of rare earth elements, less acid and alkali consumption, short process flow, 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 Patents(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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