Preparation method for obtaining high-purity praseodymium oxide and neodymium oxide through single-factor separation of praseodymium-neodymium enriched product

A technology of enrichment and praseodymium oxide, which is applied in the direction of improving process efficiency, etc., can solve the problems of difficulty in obtaining high-purity neodymium and high-purity praseodymium, low separation coefficient of praseodymium and neodymium, and difficult control of praseodymium and neodymium, so as to achieve good product quality , Product quality is stable, the effect of less impurities

Active Publication Date: 2020-03-27
中稀(常州)稀土新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem that the separation coefficient of praseodymium and neodymium is low at present, if the content of praseodymium and neodymium fluctuates, it is difficult to control and it is difficult to obtain high-purity neodymium and high-purity praseodymium. Then extract and separate high-purity praseodymium oxide and high-purity neodymium oxide from the enrichment of praseodymium and neodymium with stable content. By controlling the source of raw materials, the separation of praseodymium and neodymium is better controlled, and the purity of praseodymium and neodymium obtained is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Dissolve the light rare earth whose main components are lanthanum, cerium, praseodymium and neodymium in hydrochloric acid, remove the insoluble particles, the remaining solution mainly contains rare earth chloride solution, add sodium carbonate to the feed solution to pH 12, and form rare earth Precipitation, after solid-liquid separation, a large amount of non-rare earth impurities are discharged from the mother liquor, and the precipitate is mixed with hydrochloric acid to keep the pH at 3 to 4 to obtain a rare earth chloride solution, in which the rare earth concentration is La 15.0g / L and Ce 40.0g / L , Pr 10.0g / L, Nd 28.0g / L.

[0039] (2) With octanol, naphthenic acid, sulfonated kerosene mass ratio 1:1:2 mixture is organic phase, saponification, saponification value 0.52, feed liquid and organic phase after saponification are added in the first extraction tank, organic phase, The volume flow ratio of the enriched material liquid of lanthanum, cerium, praseodymi...

Embodiment 2

[0045] (1) Dissolving the light rare earth whose main components are lanthanum, cerium, praseodymium and neodymium in hydrochloric acid to remove insoluble particles, the remaining solution mainly contains rare earth ion chloride solution, and sodium carbonate is added to the feed solution to pH 12 to form rare earth Precipitation, after solid-liquid separation, a large amount of non-rare earth impurities are discharged from the mother liquor, the precipitate is mixed with hydrochloric acid, and the pH is kept at 3 to 4 to obtain a rare earth chloride solution, in which the rare earth concentration La 24.0g / L, Ce 27.0g / L , Pr 20.0g / L, Nd45.0g / L.

[0046] (2) With octanol, naphthenic acid, sulfonated kerosene mass ratio 0.8:1:1.8 mixture is organic phase, saponification value 0.52, feed liquid and organic phase are added in the first extraction tank, organic phase, lanthanum cerium praseodymium neodymium The volume flow ratio of the enriched material liquid is 3.8:1, the water ...

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Abstract

The invention relates to the technical field of rare earth separation, in particular to a preparation method for obtaining high-purity praseodymium oxide and neodymium oxide through single-factor separation of a praseodymium-neodymium enriched product. The preparation method comprises the following steps: dissolving light rare earth of lanthanum, cerium, praseodymium and neodymium into hydrochloric acid; after impurities are removed, mixing and adding a feed liquid and an organic phase into an extraction tank, introducing a water phase into the extraction tank in the opposite direction, carrying out an extraction reaction, collecting a Pr and Nd rare earth organic phase, and obtaining a praseodymium-neodymium organic phase enriched product; adding qualified praseodymium and neodymium products, adjusting the contents of praseodymium and neodymium, and stabilizing the mass ratio of praseodymium; and mixing the adjusted praseodymium-neodymium enriched product serving as a raw material with an organic phase, adding the mixture into an extraction tank, and performing single-factor separation to obtain high-purity praseodymium oxide and neodymium oxide. The method provided by the invention can ensure that the praseodymium and neodymium obtained by single-factor separation are high in purity and contain few impurities. Moreover, large-batch production of praseodymium and neodymium products is facilitated, and the product quality is very stable.

Description

technical field [0001] The invention relates to the technical field of rare earth separation, in particular to a method for preparing high-purity praseodymium oxide and neodymium oxide by single separation of praseodymium and neodymium concentrates. Background technique [0002] Rare earth is the abbreviation of a group of metals, which includes lanthanum, cerium, praseodymium, neodymium, giant, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium of the lanthanide elements in the third subgroup of the periodic table of chemical elements , lutetium, and scandium and yttrium with similar properties. [0003] Rare earth is playing an increasingly important role in the technological progress and development of traditional industries. Its application in many fields can generate economic and social benefits dozens or even hundreds of times its own value. In recent years, the application fields of rare earths have become more and more extensive...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B3/10C22B59/00
CPCC22B3/10C22B59/00C22B3/26Y02P10/20
Inventor 姚栋伟罗中武周健朱亚清贺国伟黄俊军施碧峰蒋宏徐敏蒋逸波刘惠芬蒋超超施建兴刘玉平陈春琴周红燕蒋网生陈永强孙鹏蒋雪薇周亚珠邓文俊牛卫芳张琳邰艳婷王阳任苏蕾邹建东杨迎
Owner 中稀(常州)稀土新材料有限公司
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