Simultaneous process of electroreducing ytterbium and oxidizing cerium

An electrolysis method and cerium oxide technology, which are applied in the improvement of process efficiency, instruments, optics, etc., can solve the problems of not considering the utilization of cathode electric energy, short process flow, non-compliance, etc., and achieve easy control, simple process, and avoidance of consumption. Effect

Inactive Publication Date: 2007-06-27
北京方正稀土科技研究所有限公司 +2
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Problems solved by technology

Chinese patent literature CN1202459A reports a method for electrolyzing cerium oxide in a sulfuric acid system. Due to its short process flow, low cost and stable product quality, it has great development potential, but it does not consider the utilization of cathode electric energy, and the energy consumption is too large. , does not meet the criteria for creating a conservation-oriented society

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  • Simultaneous process of electroreducing ytterbium and oxidizing cerium

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[0026] A. Preparation of cathode solution: add water to the carbonate of thulium, ytterbium, and lutetium concentrates, and then dissolve them with sulfuric acid to prepare a sulfuric acid solution of a mixture of thulium, ytterbium, and lutetium, with a concentration of 0.1965mol / L. Adjust the solution The pH is 0.60;

[0027] B. Preparation of anode solution: After adding cerium-rich carbonate to water for slurry adjustment, dissolve it with sulfuric acid to prepare a cerium carbonate solution with a concentration of 0.2758mol / L and Ce / REO of 61.11%, [H + ] is 2.0mol / L;

[0028] C. get 1000ml thulium ytterbium lutetium sulfuric acid solution and 1000ml cerium sulfate solution respectively, drop into electrolyzer cathode chamber 14 and anode chamber 13;

[0029] D. Electrolysis: the negative electrode is metallic mercury, and the anode is a diamond-shaped reticular ruthenium-iridium-titanium alloy. Under the situation of 20° C., start the stirring device 15 of the negative e...

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Abstract

The present invention is one electrolytic process of reducing Yb, enriching Tu and Lu, and oxidizing Ce simultaneously. The electrolytic process reduces Yb into bivalent Yb ion in the cathode chamber so as to separate out Yb from the enriched Yb, Tu and Lu; oxidizes Ce into four-valent ion so as to separate out Ce. The electrolytic equipment has cathode of metal mercury or amalgam, anode of inert metal, anion exchange membrane to separate the anode chamber from the cathode chamber, cathode solution of sulfuric acid solution of pH 0.1-4.0 with enriched Yb, Tu and Lu, and anode solution of sulfuric acid solution of acidity 0.01-3.0 mol / L with enriched Ce. The present invention has low production cost, best utilization of electrolytic current and other advantages.

Description

technical field [0001] The invention relates to a method for electrolytically reducing ytterbium to enrich thulium and lutetium while oxidizing cerium. Background technique [0002] my country's unique southern mines are rich in heavy rare earth resources, but at present, thulium, ytterbium, and lutetium concentrates are mainly separated by extraction, chromatography, and reduction methods. The extraction method is a commonly used method in the world and can obtain high-purity oxides. However, this method takes up a large amount of extractant and the process is complicated, which makes the production cost high. Chromatography includes extraction chromatography and ion exchange chromatography. Extraction chromatography is used to directly prepare high-purity thulium and lutetium from thulium, ytterbium, and lutetium enriched materials. Due to the high content of ytterbium, the yield is low and the yield is low. The rate is low and the cost is high. The reduction method is t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C1/22C25C1/24
CPCY02P10/20
Inventor 张玻贾江涛廖春生严纯华刘营
Owner 北京方正稀土科技研究所有限公司
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