JPS56155017A - Preparation of alumina having extremely low content of radioactive element - Google Patents
Preparation of alumina having extremely low content of radioactive elementInfo
- Publication number
- JPS56155017A JPS56155017A JP5706480A JP5706480A JPS56155017A JP S56155017 A JPS56155017 A JP S56155017A JP 5706480 A JP5706480 A JP 5706480A JP 5706480 A JP5706480 A JP 5706480A JP S56155017 A JPS56155017 A JP S56155017A
- Authority
- JP
- Japan
- Prior art keywords
- alumina
- mineral acid
- thorium
- uranium
- preparation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
PURPOSE: To dissolve radioactive elements contained in alumina in a mineral acid and to remove them from the alumina, by dipping the alumina in a diluted aqueous solution of the mineral acid.
CONSTITUTION: Since a very small amount of radioactive elements, e.g., uranium, thorium, etc. exists in alumina prepared by Bayer's process using bauxite as a raw material, it can not be used as a package for semiconductor memory, etc. The alumina is added to 0.2W0.5N diluted solution of a mineral acid, e.g., nitric acid, sulfuric acid, etc. and stirred for 0.5W1hr. The radioactive elements, e.g., uranium, thorium, etc. contained in the alumina are eluted in the solution of the mineral acid. The alumina is taken out from the aqueous solution of the mineral acid and washed, to give alumina with a small content of uranium and thorium.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5706480A JPS56155017A (en) | 1980-05-01 | 1980-05-01 | Preparation of alumina having extremely low content of radioactive element |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5706480A JPS56155017A (en) | 1980-05-01 | 1980-05-01 | Preparation of alumina having extremely low content of radioactive element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56155017A true JPS56155017A (en) | 1981-12-01 |
| JPS6257576B2 JPS6257576B2 (en) | 1987-12-01 |
Family
ID=13045008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5706480A Granted JPS56155017A (en) | 1980-05-01 | 1980-05-01 | Preparation of alumina having extremely low content of radioactive element |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56155017A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115947361A (en) * | 2022-11-21 | 2023-04-11 | 江苏联瑞新材料股份有限公司 | Low-radioactivity alumina powder and preparation method thereof |
-
1980
- 1980-05-01 JP JP5706480A patent/JPS56155017A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115947361A (en) * | 2022-11-21 | 2023-04-11 | 江苏联瑞新材料股份有限公司 | Low-radioactivity alumina powder and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6257576B2 (en) | 1987-12-01 |
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