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Methods of producing terbium oxide and dysprosium oxide

A technology of dysprosium oxide and terbium oxide, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of high impurity content of ytterbium oxide and cannot be removed, and achieve high purity

Inactive Publication Date: 2019-10-15
BAOTOU RES INST OF RARE EARTHS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method cannot remove Yb in terbium chloride solution 3+ , the impurity content of ytterbium oxide in the prepared terbium oxide is relatively high

Method used

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  • Methods of producing terbium oxide and dysprosium oxide
  • Methods of producing terbium oxide and dysprosium oxide
  • Methods of producing terbium oxide and dysprosium oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] The rare earth chloride feed liquid (rare earth chloride concentration is 1.5mol / L, hydrogen ion concentration is 0.3mol / L, and organic impurity concentration is 29mg / L) containing terbium and dysprosium element that samarium europium extraction separates obtains with 360L / h The flow rate is passed through the resin column (0.3m in diameter and 3m in height) filled with cross-linked styrene-divinylbenzene polymer; the rare earth chloride feed solution passing through the resin column is adjusted to 0.2mol hydrogen ion concentration with ammonium bicarbonate / L to obtain the treated rare earth chloride feed liquid.

[0050] The treated rare earth chloride feed liquid is used as the separation feed liquid, the extractant is 2-ethylhexyl phosphate mono-2-ethylhexyl ester, and the diluent is kerosene, and dysprosium-holmium extraction, gadolinium-terbium extraction and terbium-dysprosium extraction are carried out to obtain Terbium chloride solution and Dysprosium chloride ...

Embodiment 2

[0053] The rare earth chloride feed liquid (the concentration of rare earth chloride is 1.5mol / L, the concentration of hydrogen ion is 0.4mol / L, and the concentration of organic impurities is 15mg / L) containing terbium and dysprosium elements obtained by extracting and separating samarium and europium is 100L / h The flow rate is passed through the resin column (0.3m in diameter and 3m in height) filled with cross-linked styrene-divinylbenzene polymer; the rare earth chloride feed solution passing through the resin column is adjusted to 0.2mol hydrogen ion concentration with ammonium bicarbonate / L to obtain the treated rare earth chloride feed liquid.

[0054] The treated rare earth chloride feed liquid is used as the separation feed liquid, the extractant is 2-ethylhexyl phosphate mono-2-ethylhexyl ester, and the diluent is kerosene, and dysprosium-holmium extraction, gadolinium-terbium extraction and terbium-dysprosium extraction are carried out to obtain Terbium chloride sol...

Embodiment 3

[0057] The rare earth chloride feed liquid (the concentration of rare earth chloride is 1.5mol / L, the concentration of hydrogen ion is 0.5mol / L, and the concentration of organic impurities is 40mg / L) containing terbium and dysprosium elements obtained by extracting and separating samarium and europium is 400L / h The flow rate is passed through the resin column (0.3m in diameter and 3m in height) filled with cross-linked styrene-divinylbenzene polymer; the rare earth chloride feed solution passing through the resin column is adjusted to 0.2mol hydrogen ion concentration with ammonium bicarbonate / L to obtain the treated rare earth chloride feed liquid.

[0058] The treated rare earth chloride feed liquid is used as the separation feed liquid, the extractant is 2-ethylhexyl phosphate mono-2-ethylhexyl ester, and the diluent is kerosene, and dysprosium-holmium extraction, gadolinium-terbium extraction and terbium-dysprosium extraction are carried out to obtain Terbium chloride sol...

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Abstract

The invention discloses a method for producing terbium oxide and dysprosium oxide, which comprises the following steps of: (1) treating a rare earth chloride liquid, containing terbium and dysprosiumelements and obtained by extracting and separating samarium and europium, through a resin column filled with a crosslinked styrene-divinylbenzene polymer to obtain treated rare earth chloride feed liquid; (2) carrying out dysprosium-holmium extraction, gadolinium-terbium extraction and terbium-dysprosium extraction by taking the treated rare earth chloride feed liquid as a separation feed liquid to obtain a terbium chloride solution and a dysprosium chloride solution; and (3) respectively precipitating and firing the terbium chloride solution and the dysprosium chloride solution to obtain terbium oxide and dysprosium oxide. The content of ytterbium oxide impurities in dysprosium oxide and terbium oxide prepared by the method is low.

Description

technical field [0001] The present invention relates to a method for producing terbium oxide and dysprosium oxide. Background technique [0002] Rare earth elements have important uses in industry. Dysprosium oxide can be used as a raw material for the preparation of dysprosium metal, as an additive to glass and NdFeB permanent magnets, and can also be used in metal halide lamps, magneto-optical memory materials, yttrium-iron or yttrium-aluminum garnet, and in the atomic energy industry. Terbium oxide can also be used to prepare metal terbium, magneto-optical glass, phosphor powder, magneto-optic storage, chemical additives, etc. [0003] CN1047700A discloses a process for extracting pure terbium by fractional distillation: using ethylhexyl phosphate-2-ethylhexyl ammonium salt and ethylhexyl phosphate-2-ethylhexyl ester as extractant, kerosene, sulfonated kerosene, 200 One of the No. gasoline is a diluent, the extractant and the diluent are used to form the extracted organ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
CPCC01P2006/80C01F17/10C01F17/206
Inventor 马莹郝先库张瑞祥斯琴毕力格张文娟郝一凡刘海旺王士智
Owner BAOTOU RES INST OF RARE EARTHS
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