Method for preparing 6N-grade terbium chloride through extraction and separation

A terbium chloride and extraction technology is applied in the field of preparing 6N-level terbium chloride aqueous solution to achieve the effects of less reagent consumption, high purity and low production cost

Active Publication Date: 2022-07-22
NANCHANG HANGKONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims at the present method for preparing 6N-grade terbium chloride, and establishes a method for extracting and separating 4N-grade terbium chloride aqueous solution to prepare 6N-grade terbium chloride aqueous solution

Method used

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  • Method for preparing 6N-grade terbium chloride through extraction and separation

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Experimental program
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Embodiment 1

[0021] The unsupported organic phase is sulfonated kerosene with P229, wherein the concentration of P229 is 1.0 mol / L.

[0022] The concentrations of rare earth elements in 4N-grade terbium chloride aqueous solution are Sm 0.45 mg / L, Eu 1.3 mg / L, Gd 4.7 mg / L, Tb 160 g / L, Dy 6.5 mg / L, and Ho 1.6 mg / L, respectively.

[0023] SmEuGdTb / TbDyHo full-load fractionation extraction system: the equilibrium organic phase of the feed stage of the SmEuGd / Tb full-load fractionation extraction system is the rare earth saponified organic phase, and the rare earth saponified organic phase enters the SmEuGdTb / TbDyHo full-load fractionation extraction system from the first stage; The terbium chloride aqueous solution is the feed liquid, and the feed liquid 4N-grade terbium chloride aqueous solution enters the SmEuGdTb / TbDyHo full-load fractionation extraction system from the 13th stage (feed stage); the equilibrium water phase of the feed stage of the Tb / DyHo full-load fractionation extraction sy...

Embodiment 2

[0030] The unsupported organic phase is sulfonated kerosene with P229, wherein the concentration of P229 is 1.0 mol / L.

[0031] The concentrations of rare earth elements in 4N-grade terbium chloride aqueous solution are Sm 0.24 mg / L, Eu 0.79 mg / L, Gd 3.1 mg / L, Tb 158 g / L, Dy 3.6 mg / L, and Ho 0.85 mg / L, respectively.

[0032] SmEuGdTb / TbDyHo full-load fractionation extraction system: the equilibrium organic phase of the feed stage of the SmEuGd / Tb full-load fractionation extraction system is the rare earth saponified organic phase, and the rare earth saponified organic phase enters the SmEuGdTb / TbDyHo full-load fractionation extraction system from the first stage; The terbium chloride aqueous solution is the feed liquid, and the feed liquid 4N-grade terbium chloride aqueous solution enters the SmEuGdTb / TbDyHo full-load fractionation extraction system from the 13th stage (feed stage); the equilibrium water phase of the feed stage of the Tb / DyHo full-load fractionation extraction ...

Embodiment 3

[0039] The unsupported organic phase is sulfonated kerosene with P229, wherein the concentration of P229 is 1.0 mol / L.

[0040] The concentrations of rare earth elements in 4N-grade terbium chloride aqueous solution are Sm 0.13 mg / L, Eu 0.31 mg / L, Gd 1.5 mg / L, Tb 156 g / L, Dy 2.3 mg / L, and Ho 0.32 mg / L, respectively.

[0041] SmEuGdTb / TbDyHo full-load fractionation extraction system: the equilibrium organic phase of the feed stage of the SmEuGd / Tb full-load fractionation extraction system is the rare earth saponified organic phase, and the rare earth saponified organic phase enters the SmEuGdTb / TbDyHo full-load fractionation extraction system from the first stage; The terbium chloride aqueous solution is the feed liquid, and the feed liquid 4N-grade terbium chloride aqueous solution enters the SmEuGdTb / TbDyHo full-load fractionation extraction system from the 18th stage (feed stage); the equilibrium water phase of the feed stage of the Tb / DyHo full-load fractionation extraction ...

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Abstract

The invention relates to a method for preparing 6N-grade terbium chloride through extraction and separation. The method comprises a saponification section, a SmEuGdTb / TbDyHo full-load fractional extraction system, a SmEuGd / Tb full-load fractional extraction system, a Tb / DyHo full-load fractional extraction system and a washing section. Rare earth element impurities including samarium, europium, gadolinium, dysprosium and holmium in the 4N-grade terbium chloride aqueous solution are removed through P229 extraction and separation, and a 6N-grade terbium chloride aqueous solution is prepared. The purity of terbium in a target product 6N-grade terbium chloride aqueous solution is 99.99991%-99.99998%, and the yield of terbium is 96%-98%. The method has the advantages of high product purity, high terbium yield, low reagent consumption, good separation effect, low production cost and the like.

Description

technical field [0001] The present invention is a method for preparing 6N-level terbium chloride by extraction and separation, and specifically relates to using a 4N-level terbium chloride aqueous solution as a feed liquid, and removing rare earth element impurities samarium, europium, gadolinium, Dysprosium and holmium to prepare 6N-grade terbium chloride aqueous solution. The specific technical field of the present invention belongs to the preparation of 6N grade terbium chloride. Background technique [0002] 6N grade terbium compounds have important applications in the fields of magnetostriction, magneto-optics, magnetic bubbles, fluorescence and other modern functional materials. At present, there is no public report on the preparation method of 6N-grade terbium compounds such as 6N-grade terbium chloride. 6N-grade terbium chloride is the basic raw material for the preparation of other 6N-grade terbium compounds, so the separation and preparation of 6N-grade terbium c...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B59/00
CPCC22B59/00Y02P10/20
Inventor 钟学明罗旭彪曾桂生罗胜联
Owner NANCHANG HANGKONG UNIVERSITY
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