Title:
【発明の名称】熱処理による不純物含有酸化アルミニウムの精製方法
Document Type and Number:
Japanese Patent JPH10500389
Kind Code:
A
Abstract:
The invention relates to a method for preparing impure aluminium oxide. In accordance with the invention, impure, granular or ground aluminium oxide is subjected to thermal treatment at a temperature of 500-900 DEG C. The thermally-treated aluminium oxide is dissolved in concentrated acid at a raised temperature, is diluted with water, and when necessary, is filtered and centrifugated in order to remove undissolved components. Aluminium salts purified with the method of the invention are suitable to be used as water purifying and retention agents.
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Inventors:
Jokinen, Shimo
Aita, Aero
Aita, Aero
Application Number:
JP53007695A
Publication Date:
January 13, 1998
Filing Date:
May 19, 1995
Export Citation:
Assignee:
Chemila Chemicals Oy
International Classes:
C01F7/56; B01J20/34; C01B15/023; C01F7/46; C01F7/74; (IPC1-7): C01F7/46; B01J20/34; C01B15/023
Attorney, Agent or Firm:
Shigeru Yagita (2 outside)