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Method for preparing multihole sheet large-grain praseodymium oxide

A technology of large particles and praseodymium oxide, which is applied in the fields of chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problem that the particle size of praseodymium oxide products has not been reported, and achieve the effect of good fluidity and uniform particles

Active Publication Date: 2014-12-03
BAOTOU JINGRUI NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

CN101633515A provides a method for large specific gravity praseodymium oxide, using praseodymium chloride as the feed liquid, ammonium bicarbonate as the precipitating agent, and the precipitation temperature is greater than 90°C to obtain precipitation, and after burning, the product of large specific gravity and large particle praseodymium oxide is obtained, but the praseodymium oxide The particle size of the product is not reported; CN102531024A and CN102502760A provide two kinds of methods for preparing large particle NdPrO, using NdPr2 as feed liquid, ammonium bicarbonate as precipitant, and two different precipitation temperatures to obtain morphology as spherical and Praseodymium and neodymium oxide products in flake shape with a central particle size of 25-45 μm

Method used

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  • Method for preparing multihole sheet large-grain praseodymium oxide
  • Method for preparing multihole sheet large-grain praseodymium oxide
  • Method for preparing multihole sheet large-grain praseodymium oxide

Examples

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Embodiment 1

[0011] Adding 350g ammonium bicarbonate, 300ml concentration is 28% ammoniacal liquor and deionized water 520ml in reactor, then adding 40ml concentration is the praseodymium nitrate solution of 1.59mol / L, obtains the mixed solution of ammonium bicarbonate, ammoniacal liquor and praseodymium nitrate; Add 56ml of 30% hydrogen peroxide to the mixed solution, react for 1.5 hours, and age for 28 hours to obtain a precipitate of praseodymium peroxycarbonate, filter and wash the precipitate, set the burning temperature to 900°C, and keep it warm for 4 hours to obtain the central particle size D 50 It is 24.93μm porous sheet-like large particle praseodymium oxide.

Embodiment 2

[0013] Adding 350g ammonium bicarbonate, 300ml concentration is 28% ammoniacal liquor and deionized water 520ml in reactor, then adding 40ml concentration is the praseodymium nitrate solution of 1.59mol / L, obtains the mixed solution of ammonium bicarbonate, ammoniacal liquor and praseodymium nitrate; Add 56ml of hydrogen peroxide with a concentration of 30% to the mixed solution, react for 1.5 hours, and age for 32 hours to obtain a precipitate of praseodymium peroxycarbonate, filter and wash the precipitate, set the burning temperature to 1000°C, and keep it warm for 4 hours to obtain the central particle size D 50 It is 28.34μm porous sheet-shaped large particle praseodymium oxide.

Embodiment 3

[0015] Adding 350g ammonium bicarbonate, 300ml concentration is 28% ammoniacal liquor and deionized water 520ml in reactor, then adding 40ml concentration is the praseodymium nitrate solution of 1.59mol / L, obtains the mixed solution of ammonium bicarbonate, ammoniacal liquor and praseodymium nitrate; Add 56ml of hydrogen peroxide with a concentration of 30% to the mixed solution, react for 1.5 hours, and age for 44 hours to obtain a precipitate of praseodymium peroxycarbonate, filter and wash the precipitate, set the burning temperature to 1100°C, and keep it warm for 4 hours to obtain the central particle size D 50 It is 30.84μm porous sheet-shaped large particle praseodymium oxide.

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Abstract

The invention relates to a method for preparing multihole sheet large-grain praseodymium oxide, which belongs to the field of a material preparation process. The method comprises the following steps of: preparing an ammonium bicarbonate solution by using ammonium bicarbonate, ammonia and deionized water; adding a praseodymium nitrate solution to the ammonium bicarbonate solution to obtain a mixed solution of the ammonium bicarbonate, the ammonia and praseodymium nitrate; adding hydrogen peroxide to the mixed solution to generate praseodymium carbonate peroxide precipitate; aging for 24-48 hours; filtering and washing the praseodymium carbonate peroxide precipitate; burning at the temperature of 900-1200 DEG C, and preserving the temperature for 4 hours to obtain a multihole sheet large-grain praseodymium oxide product which has central grain diameter D50 of 20-35 micrometers, uniform grain and good flowability.

Description

technical field [0001] The invention relates to a method for preparing porous sheet-shaped large-particle praseodymium oxide, which belongs to a material preparation process. Background technique [0002] Praseodymium oxide is widely used in magnetic materials, glass, ceramics, catalysis, electronics and other fields. With the development of science and technology, large particles of praseodymium oxide have great application prospects in filling materials, spraying materials, special magnetic materials, and neutron absorbers. CN101633515A provides a method for large specific gravity praseodymium oxide, using praseodymium chloride as the feed liquid, ammonium bicarbonate as the precipitating agent, and the precipitation temperature is greater than 90°C to obtain precipitation, and after burning, the product of large specific gravity and large particle praseodymium oxide is obtained, but the praseodymium oxide The particle size of the product is not reported; CN102531024A and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00
Inventor 张瑞祥郝先库赵永志汪立新刘海旺王士智胡珊珊马显东许宗泽
Owner BAOTOU JINGRUI NEW MATERIAL