Method for preparing rare earth oxide with large particles

A rare earth oxide, large particle technology, applied in rare earth metal compounds, chemical instruments and methods, inorganic chemistry, etc., can solve problems such as difficulty in control, increase in industrial production costs, and complication of surfactant or dispersant experiments. The effect of low cost, good fluidity and simple preparation process

Inactive Publication Date: 2010-07-21
BAOTOU RES INST OF RARE EARTHS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The addition of surfactants or dispersants during the precipitation process complicates the experiment and is difficult to control, while increasing the cost of industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Prepare solid oxalic acid into oxalic acid solution and use concentrated HNO 3 Adjust the acidity of the oxalic acid solution to 5.5M, place it in a water bath and stir. The preparation concentration is 308g / L Y(NO 3 ) 3 Solution, added dropwise to the prepared oxalic acid solution to precipitate. Aged at 80°C for 5h, filtered and washed. Burn at 1100°C for 3h to get Y 2 o 3 powder. Using Coluter laser particle size analyzer to test Y 2 o 3 powder, D. 50 is 74.88 μm.

Embodiment 2

[0025] Prepare solid oxalic acid into oxalic acid solution and use concentrated HNO 3 Adjust the acidity of the oxalic acid solution to 7M, place it in a water bath and stir. The preparation concentration is 308g / L Y(NO 3 ) 3 Solution, added dropwise to the prepared oxalic acid solution to precipitate. Aged at 60°C for 3h, filtered and washed. Burn at 1100°C for 2h to get Y 2 o 3 powder. Using Coluter laser particle size analyzer to test Y 2 o 3 powder, D. 50 is 41.45 μm.

Embodiment 3

[0027] The solid oxalic acid was prepared into an oxalic acid solution, and the acidity of the oxalic acid solution was adjusted to 7.5M by using HCl, and stirred in a water bath. Prepare YCl with a concentration of 200g / L 3 Solution, added dropwise to the prepared oxalic acid solution to precipitate. Aged at 80°C for 5h, filtered and washed. Burn at 1100°C for 3h to get Y 2 o 3 powder. Using Coluter laser particle size analyzer to test Y 2 o 3 powder, D. 50 is 47.27 μm.

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Abstract

The invention relates to a simple method for preparing a rare earth oxide with large particles, which is characterized by: a. preparing a rare earth salt solution; b. using oxalate as a precipitator, adding the prepared rare earth salt solution into an oxalate solution which is mixed to a certain acidity, carrying out precipitation through stirring, and obtaining rear earth oxalate precipitation; c. stopping stirring and standing and aging the precipitate; and d. filtering the aged precipitate, washing, firing, and obtaining the product of the rare earth oxide with large particles. The invention has the advantages that: since the process of oxalate precipitation is simplified, additive such as a dispersing agent or a surface active agent and the like is not added, the rare earth oxide powder with the particle size of 10-100 mum is prepared, the mobility of products is good, the preparation process is simple, the cost is low, and the invention is suitable for the industrial production.

Description

Technical field: [0001] The invention relates to a simple method for preparing large-particle rare earth oxides, in particular to a method for preparing large-particle rare earth oxides used in the fields of resin filling materials, spraying materials, polishing materials and catalysts, and belongs to the preparation of rare earth oxide materials field. Background technique: [0002] Rare earth oxides are widely used in the fields of ceramic materials, fluorescent materials, polishing materials and electronic materials due to their unique physical properties. At present, most of the ultrafine rare earth oxides prepared by conventional methods, and for D 50 There are relatively few studies on rare earth oxides >10 μm. With the deepening of research and application, higher and higher requirements are put forward for its granularity. The preparation of large particle rare earth oxides has become a development trend. [0003] The common method for preparing rare earth oxi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
Inventor 马莹李莉娜许延辉乔军王宝荣王晶晶苏允兰王笃金
Owner BAOTOU RES INST OF RARE EARTHS
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