Removal of Chloride Ions in [alpha]-Fe2O3 by Heating in Humid Air

Removal of Chloride Ions in [alpha]-Fe2O3 by Heating in Humid Air

Chloride ion contained in α-Fe2O3 powders has been effectively removed by heating in humid air without any changes in the surface areas of the powders. The Cl- content in α-Fe2O3 decreased to O.10-0.045 wt% by heating at 300-560°C for 1.0 h in the air containing 28 wt% H2O. The treated α-Fe2O3 revea...

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Veröffentlicht in:Nippon Kagakukai shi (1972) 1984-07, Vol.1984 (7), p.1202
Hauptverfasser: SUGANUMA, Kyoko, OBI, Tatsuro
Format: Artikel
Sprache:eng
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Zusammenfassung:Chloride ion contained in α-Fe2O3 powders has been effectively removed by heating in humid air without any changes in the surface areas of the powders. The Cl- content in α-Fe2O3 decreased to O.10-0.045 wt% by heating at 300-560°C for 1.0 h in the air containing 28 wt% H2O. The treated α-Fe2O3 revealed only a slight change in the specific surface area from 5.2 m2ig to 4.9 m2/g. The electron microscopic observation showed that no considerable sintering between the particles occurred in the calcination process.
ISSN:0369-4577