Method for industrialized production of high-purity neodymium oxide

A neodymium oxide, high-purity technology, applied in chemical instruments and methods, preparation/processing of rare earth metal oxides/hydroxides, rare earth metal compounds, etc., can solve problems such as high production costs, complicated equipment, and cumbersome operations. Achieve the effect of low cost, low cost, and less rare earth in the groove

Active Publication Date: 2016-08-24
赣州稀土(龙南)有色金属有限公司 +1
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Problems solved by technology

[0003] Chinese patent CN1150975 discloses a method for preparing neodymium oxide by ion exchange. This method can obtain neodymium oxide with a purity of 99.999%, and the total yield of rare earths is 93-95.5%. However, this method has the disadvantages of incapable of continuous industrial production and high cost
Chinese patent CN101024505A discloses a method for preparing high-purity ultrafine neodymium oxide from praseodymium and neodymium concentrates. The method adopts ultrasonic fractionation extraction, which improves the extraction separation rate and efficiency, and obtains neodymium oxide with a purity of 99.99%. However, there are equipment for this method Complicated, cumbersome operation, high production cost, and low product purity

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  • Method for industrialized production of high-purity neodymium oxide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Rare earth-enriched material solution of lanthanum, cerium, praseodymium and neodymium is prepared. The material liquid is obtained from the light rare earth components after grouping neodymium and samarium of the southern ionic rare earth mine. Molar concentration of total rare earths = 0.70 moles per liter, pH = 2. Its composition is shown in Table 1.

[0026] Table 1. The composition of the rare earth enriched material liquid of lanthanum, cerium, praseodymium and neodymium

[0027] rare earth oxide

La

Ce

Pr

Nd

SM

Ho-Lu

Y

weight ratio(%)

24.5

4.49

11.6

59.5

<0.001

<0.001

<0.001

[0028] (2) Prepare the organic phase. The volume ratio of P507 and sulfonated kerosene is 40:60. The degree of alkali saponification of the organic phase was 36%.

[0029] (3) The enriched material liquid of lanthanum cerium praseodymium and neodymium is mixed with the organic phase, and extracted by the lanthanum...

Embodiment 2

[0035] (1) Rare earth-enriched material solution of lanthanum, cerium, praseodymium and neodymium is prepared. The feed liquid is taken from the light rare earth component of a factory in the north. Molar concentration of total rare earths = 1.0 moles per liter, pH = 1. Its composition is shown in Table 1.

[0036] Table 1. The composition of the rare earth enriched material liquid of lanthanum, cerium, praseodymium and neodymium

[0037] rare earth oxide

La

Ce

Pr

Nd

SM

Ho-Lu

Y

weight ratio(%)

24.09

54.21

3.59

18.10

<0.001

<0.001

<0.001

[0038] (2) Prepare the organic phase. The volume ratio of P507 and sulfonated kerosene is 30:70. The degree of alkaline saponification of the organic phase was 30%.

[0039] (3) The enriched material liquid of lanthanum cerium praseodymium and neodymium is mixed with the organic phase, and extracted by the lanthanum cerium praseodymium / praseodymium neodymium fuzzy extr...

Embodiment 3

[0045] (1) Rare earth-enriched material solution of lanthanum, cerium, praseodymium and neodymium is prepared. The feed liquid is taken from a company's praseodymium and neodymium enrichment, the molar concentration of the dissolved total rare earths is 1.20 moles per liter, and the pH is 1. Its composition is shown in Table 1.

[0046] Table 1. The composition of the rare earth enriched material liquid of lanthanum, cerium, praseodymium and neodymium

[0047] rare earth oxide

La

Ce

Pr

Nd

SM

Ho-Lu

Y

weight ratio(%)

1.18

2.87

23.50

72.45

<0.001

<0.001

<0.001

[0048] (2) Prepare the organic phase. The volume ratio of P507 to sulfonated kerosene is 20:80. The degree of alkali saponification of the organic phase was 26%.

[0049] (3) The enriched material liquid of lanthanum cerium praseodymium and neodymium is mixed with the organic phase, and extracted by the lanthanum cerium praseodymium / praseodymium neo...

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Abstract

The invention discloses a method for industrialized production of high-purity neodymium oxide. The method comprises the following steps that 1, enrichment material liquid containing lanthanum, cerium, praseodymium and neodymium is mixed with an organic phase, extraction is performed through a lanthanum-praseodymium-cerium/praseodymium-neodymium fuzzy extraction module, an outlet water phase of the fuzzy extraction module contains lanthanum, cerium and praseodymium, and the outlet organic phase washed with washing liquid contains praseodymium and neodymium; 2, the praseodymium and neodymium of the organic material liquid containing praseodymium and neodymium obtained in the step 1 are separated through a praseodymium/neodymium separating module, an outlet water phase of the praseodymium/neodymium separating module is an enriched product of praseodymium and serves as the washing liquid used for the lanthanum-praseodymium-cerium/praseodymium-neodymium fuzzy extraction module in the step 1, the outlet water phase of the praseodymium/neodymium separating module contains high-purity neodymium, and the purity is 99.99%-99.999%; 3, the neodymium containing material liquid inn the step 2 is subjected to precipitation, calcinations and packaging to obtain a high-purity neodymium oxide produce. The method has the advantages of being low in production cost, high in product purity and capable of performing large-scale continuous production.

Description

technical field [0001] The invention relates to the technical field of rare earth hydrometallurgy, in particular to a method for industrially producing high-purity neodymium oxide. Background technique [0002] Due to their special electronic structure, rare earth elements have many excellent properties, and are widely used in various high-tech fields such as glass ceramics, solid laser materials, synthetic rubber, polymer polymerization, magnetism, and optics. Due to the development of high-tech in various fields and the higher and higher purity requirements for rare earth element compounds, practitioners have conducted a lot of research work on the separation technology of high-purity rare earth elements. In recent years, my country has also carried out a lot of research work on the separation technology of high-purity rare earths, especially high-purity neodymium oxide with excellent photoelectric ceramic properties, which is widely used in high-end magnetic materials, ae...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
CPCC01F17/10C01F17/206C01P2006/80
Inventor 张水波孙晓琦李福建王艳良周宏
Owner 赣州稀土(龙南)有色金属有限公司
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