A method for solvent extraction and separation of thulium, ytterbium and lutetium concentrates

A technology of enrichment, thulium, ytterbium and lutetium, which is applied in the preparation/treatment of rare earth metal compounds, rare earth metal halides, rare earth metal chlorides, etc., can solve the problems of insufficient purity, large acid and alkali consumption, and acid and alkali consumption , to achieve the effects of short process flow, less acid-base consumption, and reduced acid-base consumption

Active Publication Date: 2022-01-18
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The separation and purification of 4N grade ytterbium to 5N grade by solvent extraction also requires further consumption of acid and alkali
Therefore, the existing solvent extraction method for separating thulium, ytterbium and lutetium concentrates has the disadvantages that the product purity of ytterbium is not high enough, and the consumption of acid and alkali is relatively large.

Method used

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  • A method for solvent extraction and separation of thulium, ytterbium and lutetium concentrates

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] C272 organic phase: the volume percentage of C272 is 30%, the volume percentage of isooctyl alcohol is 10%, and the volume percentage of sulfonated kerosene 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 concentration of rare earth elements in the aqueous solution of thulium, ytterbium and lutetium chloride concentrates is: Er 0.00080g / L, Tm 17.0g / L, Yb 125.0g / L, Lu 25.0g / L.

[0026] 1) Tm / TmYb / YbLu / Lu three-in and four-out fractional distillation extraction separation system

[0027] The 4N-grade thulium saponification C272 organic phase enters the Tm / TmYb / YbLu / Lu three-inlet and four-outlet fractionation extraction separation system from the first stage, and comes from the first-stage water phase of the Tm / Yb full-load fractionation extraction separation system 2N-grade thulium chloride enters from the first stage The rare earth feed li...

Embodiment 2

[0036] C272 organic phase: the volume percentage of C272 is 30%, the volume percentage of isooctyl alcohol is 10%, and the volume percentage of sulfonated kerosene 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 concentration of rare earth elements in the aqueous solution of thulium, ytterbium and lutetium chloride concentrates is: Er 0.00050g / L, Tm 19.0g / L, Yb130.0g / L, Lu 22.0g / L.

[0038] 1) Tm / TmYb / YbLu / Lu three-in and four-out fractional distillation extraction separation system

[0039] The 4N-grade thulium saponification C272 organic phase enters the Tm / TmYb / YbLu / Lu three-inlet and four-outlet fractionation extraction separation system from the first stage, and comes from the first-stage water phase of the Tm / Yb full-load fractionation extraction separation system 2N-grade thulium chloride enters from the first stage The rare earth feed liq...

Embodiment 3

[0048] C272 organic phase: the volume percentage of C272 is 30%, the volume percentage of isooctyl alcohol is 10%, and the volume percentage of sulfonated kerosene 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 concentration of rare earth elements in the aqueous solution of thulium, ytterbium and lutetium chloride concentrates is: Er 0.00030g / L, Tm 21.0g / L, Yb 125.0g / L, Lu 19.0g / L.

[0050] 1) Tm / TmYb / YbLu / Lu three-in and four-out fractional distillation extraction separation system

[0051]The 4N-grade thulium saponification C272 organic phase enters the Tm / TmYb / YbLu / Lu three-inlet and four-outlet fractionation extraction separation system from the first stage, and comes from the first-stage water phase of the Tm / Yb full-load fractionation extraction separation system 2N-grade thulium chloride enters from the first stage The rare earth feed liq...

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Abstract

The present invention is a method for solvent extraction and separation of thulium-ytterbium-lutetium enrichment. The aqueous solution of thulium-ytterbium-lutetium chloride is used as feed liquid, C272 is used as extraction agent, and isooctanol is used as organic phase modifier. The extraction system is composed of Tm / TmYb / YbLu / Lu three-in and four-out fractionation extraction and separation system, Tm / Yb full-load fractionation extraction and separation system and Yb / Lu fractional extraction and separation system. Through the combination of three fractional distillation extractions, three separated products of 4N-grade thulium chloride, 5N-grade ytterbium chloride and 4N-grade lutetium chloride are directly obtained. The invention has the advantages of high purity of the target separation product, high yield of rare earth elements thulium ytterbium lutetium, less acid-base consumption, short technological process, low separation cost and the like.

Description

technical field [0001] The invention relates to a method for solvent extraction and separation of thulium, ytterbium and lutetium concentrates. Specifically, an aqueous solution of thulium, ytterbium, and lutetium chloride concentrates is used as a feed liquid, C272 is used as an extraction agent, and isooctyl alcohol is used as an organic phase modifier to realize light rare earth Separation among the three elements of thulium, ytterbium and lutetium to obtain three products: 4N grade thulium chloride aqueous solution, 5N grade ytterbium chloride aqueous solution and 4N grade lutetium chloride aqueous solution. The specific technical field of the present invention is separation of thulium, ytterbium and lutetium concentrates by solvent extraction. Background technique [0002] Ion-adsorption type rare earth ore is an important rare earth raw material, and the ore must obtain thulium, ytterbium and lutetium concentrates in the solvent extraction separation process. Thulium,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/271C01F17/17
CPCC01P2006/80C01F17/10C01F17/271
Inventor 钟学明刘俊辰奉凤娟徐志宇
Owner NANCHANG HANGKONG UNIVERSITY
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