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JPS57191228A - Production of alumina of low alpha-raw dose - Google Patents

Production of alumina of low alpha-raw dose

Info

Publication number
JPS57191228A
JPS57191228A JP56074116A JP7411681A JPS57191228A JP S57191228 A JPS57191228 A JP S57191228A JP 56074116 A JP56074116 A JP 56074116A JP 7411681 A JP7411681 A JP 7411681A JP S57191228 A JPS57191228 A JP S57191228A
Authority
JP
Japan
Prior art keywords
hydroxide
alumina
aluminate solution
aluminum hydroxide
added
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.)
Pending
Application number
JP56074116A
Other languages
Japanese (ja)
Inventor
Mikio Kanehara
Shoji Tanaka
Kazuo Horiba
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.)
NIHON KEIKINZOKU KK
Nippon Light Metal Co Ltd
Original Assignee
NIHON KEIKINZOKU KK
Nippon Light Metal Co Ltd
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 NIHON KEIKINZOKU KK, Nippon Light Metal Co Ltd filed Critical NIHON KEIKINZOKU KK
Priority to JP56074116A priority Critical patent/JPS57191228A/en
Publication of JPS57191228A publication Critical patent/JPS57191228A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
    • C01F7/00—Compounds of aluminium
    • C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
    • C01F7/04—Preparation of alkali metal aluminates; Aluminium oxide or hydroxide therefrom
    • C01F7/14—Aluminium oxide or hydroxide from alkali metal aluminates

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Inorganic Chemistry (AREA)
  • Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)

Abstract

PURPOSE: Barium oxide or hydroxide is added to a concentrated sodium aluminate solution in the presence of sodium carbonate, then they are filtered and aluminum hydroxide is precipitated and calcined to produce the titled alumina that is suitably used as a percelain material for high-degree integrated circuits.
CONSTITUTION: In the production of alumina where seeds of aluminum hydroxide are added to a high-concentration sodium aluminate solution to precipitate aluminum hydroxide and the aluminum hydroxide is calcined, barium oxide and/or barium hydroxide, when necessary, additionally at least one of active carbon, sodalite, ferric hydroxide, magnesium hydroxide or red mud are added to the aluminate solution in the presence of sodium carbonate, then they are stirred for a while and subjected to pre-treatment of filtering the precipitate. Radioactive substances are very effectively removed from the sodium aluminate solution to give alumina of low α-ray dose that is suitably used as a percelain material for high-degree integrated circuits.
COPYRIGHT: (C)1982,JPO&Japio
JP56074116A 1981-05-19 1981-05-19 Production of alumina of low alpha-raw dose Pending JPS57191228A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56074116A JPS57191228A (en) 1981-05-19 1981-05-19 Production of alumina of low alpha-raw dose

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56074116A JPS57191228A (en) 1981-05-19 1981-05-19 Production of alumina of low alpha-raw dose

Publications (1)

Publication Number Publication Date
JPS57191228A true JPS57191228A (en) 1982-11-25

Family

ID=13537904

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56074116A Pending JPS57191228A (en) 1981-05-19 1981-05-19 Production of alumina of low alpha-raw dose

Country Status (1)

Country Link
JP (1) JPS57191228A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6114166A (en) * 1984-06-27 1986-01-22 京セラ株式会社 Mulite sintered body and manufacture
RU2721702C1 (en) * 2019-08-22 2020-05-21 Федеральное государственное бюджетное образовательное учреждение высшего образования "Красноярский государственный аграрный университет" Method of cleaning exhaust gases from alumina sintering furnaces

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6114166A (en) * 1984-06-27 1986-01-22 京セラ株式会社 Mulite sintered body and manufacture
JPH0825790B2 (en) * 1984-06-27 1996-03-13 京セラ株式会社 Mullite sintered body for semiconductor device package and manufacturing method thereof
RU2721702C1 (en) * 2019-08-22 2020-05-21 Федеральное государственное бюджетное образовательное учреждение высшего образования "Красноярский государственный аграрный университет" Method of cleaning exhaust gases from alumina sintering furnaces

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