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Method for preparing large-grain spherical praseodymium neodymium oxide

A praseodymium neodymium oxide, large particle technology, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problem of high production cost, achieve uniform particle distribution, good dispersibility, and easy control of the preparation process.

Inactive Publication Date: 2012-07-04
INNER MONGOLIA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN200310118563.2 provides a method for preparing large-grained rare earth oxides by oxalic acid precipitation. Ammonium chloride is added to the rare earth chloride solution, and oxalic acid precipitation is used to prepare oxalic acid rare earth oxides, which are obtained after burning. Oxidation of rare earth; this method needs to add ammonium chloride, and use oxalic acid as a precipitant, the production cost is high

Method used

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  • Method for preparing large-grain spherical praseodymium neodymium oxide
  • Method for preparing large-grain spherical praseodymium neodymium oxide
  • Method for preparing large-grain spherical praseodymium neodymium oxide

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Embodiment 1

[0011] Add 1000L praseodymium neodymium chloride solution with a concentration of 0.23mol / L into the FK3000 enamel reaction tank, heat the praseodymium neodymium chloride solution to 93°C, add 300L ammonium bicarbonate solution with a concentration of 2.5mol / L, and the precipitation reaction is completed in 3 hours. Insulated and aged for 1 hour, washed and filtered to obtain a precipitate of NdPr basic carbonate, which was kept at 1000°C for 4 hours in a firing kiln to obtain a NdPr oxide product with a central particle size of 28.11 μm.

Embodiment 2

[0013] Add 1000L praseodymium neodymium chloride solution with a concentration of 0.35mol / L into the FK3000 enamel reaction tank, heat the praseodymium neodymium chloride solution to 93°C, add 450L ammonium bicarbonate solution with a concentration of 2.5mol / L, and the precipitation reaction is completed in 3 hours. Insulated and aged for 1 hour, washed and filtered to obtain a precipitate of NdPr basic carbonate, which was kept at 1000° C. for 4 hours in a firing kiln to obtain a NdPr oxide product with a central particle size of 25.53 μm.

Embodiment 3

[0015] Add 1000L praseodymium neodymium chloride solution with a concentration of 0.18mol / L into the FK3000 enamel reaction tank, heat the praseodymium neodymium chloride solution to 93°C, add 240L ammonium bicarbonate solution with a concentration of 2.5mol / L, and the precipitation reaction is completed in 3 hours. Insulated and aged for 1 hour, washed and filtered to obtain a precipitate of NdPr basic carbonate. The NdPr basic carbonate was kept at 1000°C for 4 hours in a firing kiln to obtain a NdPr oxide product with a central particle size of 28.064 μm.

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Abstract

The invention relates to a method for preparing large-grain spherical praseodymium neodymium oxide, belonging to a preparation technology of material. The method comprises the following steps of: taking praseodymium neodymium chloride solution as raw material, taking ammonium bicarbonate as precipitator, preparing basic praseodymium neodymium carbonate, and washing, filtering, centrifugally dripping and firing basic praseodymium neodymium carbonate precipitate, to obtain the spherical praseodymium neodymium oxide product with the centre grain diameter being from 25 to 30 mu m. The precipitation temperature and concentration of the basic praseodymium neodymium carbonate in the method are key factors, the precipitation temperature is less than 85 DEG C to obtain the praseodymium neodymium carbonate rather than the basic praseodymium neodymium carbonate, the preparation technology is easy to control, the large-grain praseodymium neodymium oxide product with the centre grain diameter being from 25 to 30 mu m is produced by a factory conventional praseodymium neodymium carbonate preparation working procedure, and the praseodymium neodymium oxide is even in grain distribution, good in dispersity and spherical in appearance.

Description

technical field [0001] The invention relates to a method for preparing large particles and spherical praseodymium and neodymium oxide, which belongs to a material preparation process. Background technique [0002] NdPrO is widely used in magnetic materials, glass, ceramics, catalysis, electronics and other fields, especially plays an important role in the application of NdPrO magnetic materials. With the development of science and technology, the market demand for large particles of praseodymium and neodymium oxide has increased significantly. CN200310118563.2 provides a method for preparing large-grained rare earth oxides by oxalic acid precipitation. Ammonium chloride is added to the rare earth chloride solution, and oxalic acid is used for precipitation to prepare rare earth oxalates. Oxidation of rare earth; this method needs to add ammonium chloride, and use oxalic acid as a precipitant, and the production cost is high. Contents of the invention [0003] The purpose...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y40/00
Inventor 郝先库张瑞祥李慧琴刘海旺王士智马显东斯琴毕力格许宗泽胡珊珊
Owner INNER MONGOLIA UNIV OF SCI & TECH
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