Production process of high-purity gadolinium oxide by acidic phosphorus type extracting agent

A production process and extraction agent technology are applied in the production process field of producing high-purity gadolinium oxide with an acidic phosphorus-type extractant, which can solve the problems of backward separation and purification technology of gadolinium, low product purity, complicated separation and purification process, etc., and achieves reduction of hydrochloric acid. The effect of unit consumption, ensuring product purity, and reducing production costs

Active Publication Date: 2010-01-27
甘肃稀土新材料股份有限公司
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Problems solved by technology

[0002] Gadolinium is a trace element in rare earth elements, the separation and purification process is complicated, and the raw material of gadolinium has been processed cheaply
In recent years, with the rapid development of new materials and technologies, the

Method used

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Experimental program
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Embodiment Construction

[0018] Will P 507 Prepare a 1.5mol / L organic phase with sulfonated kerosene; dissolve the solid gadolinium-rich rare earth carbonate with concentrated hydrochloric acid into a 1.5mol / L gadolinium-rich rare earth chloride solution, and vacuum filter to remove mechanical impurities; prepare industrial hydrochloric acid with pure water into a 6.0mol / L solution; prepare deionized pure water. Gd, La-Sm solution obtained by entering the Gd / Tb extraction separation line according to the flow ratio of organic: feed liquid: washing liquid: reverse liquid: acid reversed: washing water = 3.0: 1.5: 0.3: 0.35: 0.9: 0.6L / min . Then with 1.5mol / L organic phase, 6.0mol / L hydrochloric acid solution, pure water and Gd, La-Sm solution, according to organic: material liquid: washing: reverse liquid: reverse acid: washing water = 21: 2.1: 1.1: The flow ratio of 2.0:2.0:3.0L / min enters the Eu / Gd extraction separation line to obtain pure GdCl 3 solution.

[0019] pure GdCl 3 Control the pH valu...

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Abstract

The invention discloses a production process of high-purity gadolinium oxide by acidic phosphorus type extracting agent. In a P507-kerosene-HCl system of the production process, solvent extraction is adopted to separate and purify rare earth chloride solution rich in gadolinium into high-purity gadolinium chloride solution by utilizing the variation of extraction rate and distribution ratio and the difference of separation factor of saponification acidic phosphorus type extracting agent P507 on rare earth element to obtain gadolinium oxide product of 99.995%. The process adopts extracting agent purification technology and rare earth exchanging purification washing technology, therefore, the consumption of raw materials is low, the quality of products is stable, and the indicators of various rare-earth and non-rare earth impurities are far superior to congeneric products in the national standard.

Description

technical field [0001] The invention belongs to the technical field of separating rare earth elements by solvent extraction, and in particular relates to a production process for producing high-purity gadolinium oxide with an acidic phosphorus-type extractant. Background technique [0002] Gadolinium is a trace element in rare earth elements, the separation and purification process is complicated, and the raw material of gadolinium has been processed cheaply. In recent years, with the rapid development of new materials and technologies, the application of gadolinium oxide in optics, electricity, and magnetism has become more and more extensive. At present, the separation and purification technology of gadolinium by solvent extraction method is backward, and the product purity is not high. Contents of the invention [0003] The purpose of the present invention is to provide an acidic phosphorus-type extractant capable of efficiently separating and purifying high-purity gado...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B3/38
CPCY02P10/20
Inventor 张尚虎杨在璞王彩玲
Owner 甘肃稀土新材料股份有限公司
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