JPS56155017A - Preparation of alumina having extremely low content of radioactive element - Google Patents

Preparation of alumina having extremely low content of radioactive element

Info

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
Application number
JP5706480A
Other languages
Japanese (ja)
Other versions
JPS6257576B2 (en
Inventor
Shigeaki Shioda
Tsutomu Matsuki
Soichi Kazama
Akira Sakamoto
Kotaro Hirayanagi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Showa Aluminum Industries KK
Showa Keikinzoku KK
Original Assignee
Showa Aluminum Industries KK
Showa Keikinzoku KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Showa Aluminum Industries KK, Showa Keikinzoku KK filed Critical Showa Aluminum Industries KK
Priority to JP5706480A priority Critical patent/JPS56155017A/en
Publication of JPS56155017A publication Critical patent/JPS56155017A/en
Publication of JPS6257576B2 publication Critical patent/JPS6257576B2/ja
Granted legal-status Critical Current

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
JP5706480A 1980-05-01 1980-05-01 Preparation of alumina having extremely low content of radioactive element Granted JPS56155017A (en)

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 (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021172546A (en) * 2020-04-22 2021-11-01 株式会社アドマテックス Method for producing spherical particle material
CN115947361A (en) * 2022-11-21 2023-04-11 江苏联瑞新材料股份有限公司 A kind of low radioactive alumina powder and preparation method thereof
CN116924441A (en) * 2023-07-31 2023-10-24 江苏联瑞新材料股份有限公司 Low-radioactivity spherical alumina for POP packaging and preparation method thereof

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021172546A (en) * 2020-04-22 2021-11-01 株式会社アドマテックス Method for producing spherical particle material
CN115947361A (en) * 2022-11-21 2023-04-11 江苏联瑞新材料股份有限公司 A kind of low radioactive alumina powder and preparation method thereof
KR20240074685A (en) * 2022-11-21 2024-05-28 노보레이 코포레이션 Low-radioactivity alumina powder and preparation method thereof
JP2024074786A (en) * 2022-11-21 2024-05-31 江蘇聯瑞新材料股▲ふん▼有限公司 Low radioactive alumina powder and its manufacturing method
CN116924441A (en) * 2023-07-31 2023-10-24 江苏联瑞新材料股份有限公司 Low-radioactivity spherical alumina for POP packaging and preparation method thereof

Also Published As

Publication number Publication date
JPS6257576B2 (en) 1987-12-01

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