Method for preparing super-fine high-purity neodymia oxide by using Pr-Nd enriched material

A technology of enrichment and neodymium oxide, which is applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problem of low extraction rate and separation efficiency of rare earth, poor crystallization and precipitation of neodymium oxalate, and difficult to reach product use Requirements and other issues to achieve the effect of improving product quality, reducing investment in equipment and reagents, and improving the production environment

A technology of enrichment and neodymium oxide, which is applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problem of low extraction rate and separation efficiency of rare earth, poor crystallization and precipitation of neodymium oxalate, and difficult to reach product use Requirements and other issues to achieve the effect of improving product quality, reducing investment in equipment and reagents, and improving the production environment

CN100564261CInactive Publication Date: 2009-12-02常州市西南化工研究所 +2
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  • Method for preparing super-fine high-purity neodymia oxide by using Pr-Nd enriched material
  • Method for preparing super-fine high-purity neodymia oxide by using Pr-Nd enriched material
  • Method for preparing super-fine high-purity neodymia oxide by using Pr-Nd enriched material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Main equipment: extraction kettle with probe-type ultrasonic generator, crystallization kettle with probe-type ultrasonic generator.

[0026] Main raw materials: praseodymium-neodymium Pr-Nd enrichment, HNO 3 , TBP extractant, kerosene, NH 4 HCO 3 .

[0027] like figure 1 and figure 2 As shown, a method for preparing ultrafine high-purity neodymium oxide from a praseodymium-neodymium Pr-Nd enrichment is to use the praseodymium-neodymium Pr-Nd enrichment as a raw material, and the steps of the method are as follows:

[0028] (1) Mixing batching: carry out mixing batching with praseodymium-neodymium Pr-Nd, nitric acid, water, through solid-liquid separation, remove insoluble impurity, obtain praseodymium-neodymium Pr-Nd enrichment material liquid, the concentration of rare earth in the feed liquid is 0.1-2.3mol / L;

[0029] (2) Ultrasonic fractionation extraction: In an extraction kettle with a probe-type ultrasonic generating device, add praseodymium-neodymium Pr-N...

Embodiment 2

[0037] Main equipment: extraction tank with vibrator-type ultrasonic generator, crystallization tank with vibrator-type ultrasonic generator.

[0038] Main raw materials: praseodymium-neodymium Pr-Nd enrichment, HNO 3 , TBP extractant, sulfonated kerosene, (NH 4 ) 2 CO 3 .

[0039] like figure 1 and image 3 As shown, a method for preparing ultrafine high-purity neodymium oxide from a praseodymium-neodymium Pr-Nd enrichment is to use the praseodymium-neodymium Pr-Nd enrichment as a raw material, and the steps of the method are as follows:

[0040] (1) Mixing batching: carry out mixing batching with praseodymium-neodymium Pr-Nd, nitric acid, water, through solid-liquid separation, remove insoluble impurity, obtain praseodymium-neodymium Pr-Nd enrichment material liquid, the concentration of rare earth in the feed liquid is 0.1-2.3mol / L;

[0041] (2) Ultrasonic fractionation extraction: In the extraction tank with vibrator-type ultrasonic generating device, add praseodymium...

Embodiment 3

[0049] Main equipment: extraction tube with vibrating plate ultrasonic generating device, crystallization tube with vibrating plate ultrasonic generating device.

[0050] Main raw materials: praseodymium-neodymium Pr-Nd enrichment, HNO 3 , TBP extractant, No. 200 gasoline, NH 4 HCO 3 .

[0051] like figure 1 and Figure 5 As shown, a method for preparing ultrafine high-purity neodymium oxide from a praseodymium-neodymium Pr-Nd enrichment is to use the praseodymium-neodymium Pr-Nd enrichment as a raw material, and the steps of the method are as follows:

[0052] (1) Mixing batching: carry out mixing batching with praseodymium-neodymium Pr-Nd, nitric acid, water, through solid-liquid separation, remove insoluble impurity, obtain praseodymium-neodymium Pr-Nd enrichment material liquid, the concentration of rare earth in the feed liquid is 0.1-2.3mol / L;

[0053] (2) Ultrasonic fractionation extraction: In the extraction tube with a vibrating plate type ultrasonic generating ...

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Abstract

The invention relates to a method to make neodymium oxide that includes the following steps: mixing raw material, taking ultrasonic fractional extraction to gain enriched liquid containing Nd(NO3)3, taking ultrasonic to gain refined liquid of Nd(NO3)3, taking adsorption and trash extraction, taking solid-liquid separation, taking ultrasonic crystal deposition to gain Nd2(CO3)3 crystal deposit, taking solid-liquid separation, drying and burning to gain the superfine high purity neodymium oxide product that has content over 99.99%, and the particle diameter is 0.01-10.0um. The advantages of the invention are that it improves leaching and extracting speed, and the particle diameter is small, and particle size distribution equal.

Description

technical field [0001] The invention relates to a method for preparing neodymium oxide, in particular to a method for preparing superfine high-purity neodymium oxide by using praseodymium-neodymium Pr-Nd enrichment as a raw material, belonging to the field of hydrometallurgy. Background technique [0002] Ultra-fine high-purity neodymium oxide (Nd 2 o 3 ) products refer to neodymium oxide products with neodymium oxide content ≥ 99.99% and particle size ≤ 10.0 μm. Ultra-fine high-purity neodymium oxide has been well applied in rare earth permanent magnets, lasers, glass, ceramics and superconductors, and can meet the needs of high-grade products. It is an important light rare earth oxide product. At present, my country's preparation of ultra-fine high-purity Nd 2 o 3 The main raw materials are the following four kinds: (1) rare earth sulfate [RE 2 (SO 4 ) 3 ], which is composed of rare earth concentrates in Baotou, Inner Mongolia (REO≥50%, Nd 2 o 3 17%) processed RE ...

Claims

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Application Information

Patent Timeline
02 Dec 2009
Publication
CN100564261C
IPC
C01F17/00; C22B3/00
CPC
Y02P10/20
Inventors
许文林; 王雅琼