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Method for preparing cerium chloride solution

A cerium chloride and solution technology, applied in the field of preparing cerium chloride solution, can solve the problems of inability to separate and high La3+ content, and achieve the effect of improving the extraction rate

Active Publication Date: 2019-10-01
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 the La in the cerium chloride solution 3+ Separated, the obtained cerium chloride solution La 3+ high content

Method used

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  • Method for preparing cerium chloride solution
  • Method for preparing cerium chloride solution

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preparation example Construction

[0022] The method for preparing cerium chloride solution of the present invention comprises the following steps: (1) deoiling step; (2) extraction and separation step of lanthanum and cerium.

[0023]

[0024] The rare earth chloride solution containing lanthanum chloride and cerium chloride obtained by extracting and separating cerium and praseodymium is passed through a resin column to obtain a deoiled rare earth chloride solution. Wherein, the resin column is filled with a cross-linked polymer formed of styrene and divinylbenzene.

[0025] The cross-linked polymer formed of styrene and divinylbenzene in the present invention can be obtained by conventional methods. For example, a cross-linked polymer of styrene and divinylbenzene is obtained by suspension polymerization of styrene and divinylbenzene. The cross-linked polymer formed by styrene and divinylbenzene of the present invention is not limited to be obtained by suspension polymerization, but can also be obtained b...

Embodiment 1

[0044] The rare earth chloride solution (rare earth chloride concentration is 1.7mol / L, hydrogen ion concentration is 0.01mol / L, and organic impurity concentration is 15mg / L) containing lanthanum chloride and cerium chloride that cerium praseodymium extracts and separates obtains with 510L The flow rate per hour passes through a resin column (0.3m in diameter and 3m in height) filled with a cross-linked polymer formed of styrene and divinylbenzene to obtain a rare earth chloride solution after oil removal.

[0045] The rare earth chloride solution after oil removal is used as the lanthanum cerium extracting liquid, mixed with the extractant 2-ethylhexylphosphate mono-2-ethylhexyl ester and the diluent kerosene, the organic phase and the water phase are separated, and the organic phase is treated with hydrochloric acid. Stripping to obtain stripping raffinate is cerium chloride solution. Calculation of La in cerium chloride solution 3+ The content and the extraction rate of ce...

Embodiment 2

[0047] The rare earth chloride solution (rare earth chloride concentration is 1.7mol / L, hydrogen ion concentration is 0.01mol / L, and organic impurity concentration is 10mg / L) containing lanthanum chloride and cerium chloride obtained by cerium-praseodymium extraction separation is 300L The flow rate per hour passes through a resin column (0.3m in diameter and 3m in height) filled with a cross-linked polymer formed of styrene and divinylbenzene to obtain a rare earth chloride solution after oil removal.

[0048] The rare earth chloride solution after oil removal is used as the lanthanum cerium extracting liquid, mixed with the extractant 2-ethylhexylphosphate mono-2-ethylhexyl ester and the diluent kerosene, the organic phase and the water phase are separated, and the organic phase is treated with hydrochloric acid. Stripping to obtain stripping raffinate is cerium chloride solution. Calculation of La in cerium chloride solution 3+ The content and the extraction rate of cerium...

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Abstract

The invention discloses a method for preparing a cerium chloride solution. The method comprises the following steps that (1) a rare-earth chloride solution containing lanthanum chloride and cerium chloride obtained by extraction and separation of cerium and praseodymium passes a resin column to obtain the rare-earth chloride solution after oil removal; and (2) the rare-earth chloride solution after oil removal is used as a lanthanum-cerium extracting material solution to mix with an extracting agent and a diluting agent, an organic phase and a water phase are separated, and reverse extractionis carried out on the organic phase, so as to obtain a reverse extraction solution which is the cerium chloride solution. By adopting the method for preparing the cerium chloride solution, the extraction rate of the cerium can be improved, and the content of La <3+> in the prepared cerium chloride solution is low.

Description

technical field [0001] The invention relates to a method for preparing cerium chloride solution. Background technique [0002] Rare earth elements are known as "industrial vitamins". They have irreplaceable excellent magnetic, optical, and electrical properties. They play a huge role in improving product performance, increasing product varieties, and increasing production efficiency. They are widely used in metallurgy, military, Petrochemical, glass ceramics, agriculture and new materials and other fields. As an important rare earth element, cerium can be used as a reducing agent, catalyst, alloy additive, etc., and because cerium alloys have high temperature resistance, they can also be used to make jet propulsion parts. [0003] Cerium is generally extracted and separated from rare earth concentrates. The rare earth chloride solution prepared from the rare earth concentrate will contain a certain amount of organic impurities, and the organic impurities will carry a certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/24C22B3/38C22B59/00
CPCC22B3/24C22B59/00C22B3/3844Y02P10/20
Inventor 马莹郝先库张文娟张瑞祥郝一凡刘海旺王士智斯琴毕力格
Owner BAOTOU RES INST OF RARE EARTHS