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Preparation method for yttrium oxide with different specific surface area

A specific surface area, yttrium oxide technology, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of long production cycle, high cost, small specific surface area of ​​yttrium oxide, etc. The effect of short preparation time and simple process

Inactive Publication Date: 2011-10-05
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] There are many ways to prepare yttrium oxide. Zhang Yawen of Peking University has conducted in-depth research on the preparation of oxalic acid solution precipitated yttrium oxide, but the specific surface area of ​​the prepared yttrium oxide is small, only 1-10m 2 / g
At present, there are many methods for preparing yttrium oxide with large specific surface area, but the cost is high, adding surfactant hydrazine, etc., and the production cycle is long
At present, there is no low-cost, convenient and simple method for preparing yttrium oxide with large specific surface area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Prepare 800ml of 0.5M yttrium chloride solution in a 2000ml beaker, add 5M ammonia water to pH7 at 35-40°C, stir for 5min, and then add 500ml of oxalic acid solution prepared in advance with a concentration of 20% by mass. Stir for another 15 minutes, filter, and drain to obtain the yttrium oxalate product, which is burned at 800°C to obtain the yttrium oxide product. The specific surface area of ​​the product is 12m 2 / g.

Embodiment 2

[0013] It is carried out in a 1500L reactor, and 800L of 0.5M yttrium chloride solution is prepared, and 5M ammonia water is added to pH8 at 30-35°C, stirred for 8min, and then 500L of oxalic acid solution with a mass percentage concentration of 20% is added in advance. Stir for another 15 minutes, filter, and drain to obtain the yttrium oxalate product, which is burned at 800°C to obtain the yttrium oxide product. The specific surface area of ​​the product is 17m 2 / g.

Embodiment 3

[0015] Prepare 800ml of 0.5M yttrium chloride solution in a 2000ml beaker, add 5M ammonia water to pH 7.5 at 85-90°C, stir for 10min, and then add 500ml of pre-prepared oxalic acid solution with a concentration of 20% by mass. Stir for another 15 minutes, filter, and drain to obtain the yttrium oxalate product, which is burned at 800°C to obtain the yttrium oxide product. The specific surface area of ​​the product is 39m 2 / g.

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PUM

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Abstract

Disclosed is a preparation method for yttrium oxide with different specific surface areas, which is characterized by, at a temperature of 30 to 90 DEG C, adding 4 to 6 M of ammoniacal liquor into 0.4 to 0.6 M of a yttrium chloride solution until the solution reaches a pH value of 7 to 8, stirring the solution for 5 to 10 min, adding an oxalic acid solution with a mass concentration of 15 to 25% until a complete deposition is obtained, stirring the mixture for 15 to 20 min, filtering and carrying out calcination at a temperature of 800 DEG C. The invention has the advantages of a simple process, a short preparation time, low cost and capacity of preparing yttrium oxide with different specific surface areas at various reaction temperatures.

Description

technical field [0001] The invention belongs to the field of hydrometallurgy and relates to a preparation method of yttrium oxide with different specific surface areas. Background technique [0002] There are many ways to prepare yttrium oxide. Zhang Yawen of Peking University has conducted in-depth research on the preparation of oxalic acid solution precipitated yttrium oxide, but the specific surface area of ​​the prepared yttrium oxide is small, only 1-10m 2 / g. At present, there are many methods for preparing yttrium oxide with large specific surface area, but the cost is high, and the production cycle is long due to the addition of surfactant hydrazine, etc. At present, there is no low-cost, convenient and simple method for preparing yttrium oxide with large specific surface area. Contents of the invention [0003] The purpose of the present invention is to propose a method for preparing yttrium oxide with different specific surface areas in view of the shortage of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
Inventor 李颖毅
Owner NANCHANG UNIV
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