Improvements relating to the production of iron oxide

Pure ferric oxide is prepared from iron powder, especially carbonyl iron powder, by oxidizing the powder in hot water by a mixture of air and carbon dioxide to form a skin of hydrated oxide, removing excess water to form a cake, and calcining this cake in an oxidizing atmosphere, for example air at...

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Main Authors WEST DEWITT HENRY, LLEWELYN DAVID MYERS
Format Patent
LanguageEnglish
Published 01.08.1962
Subjects
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OFSOLID INORGANIC COMPOUNDS
INORGANIC CHEMISTRY
METALLURGY
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Summary:Pure ferric oxide is prepared from iron powder, especially carbonyl iron powder, by oxidizing the powder in hot water by a mixture of air and carbon dioxide to form a skin of hydrated oxide, removing excess water to form a cake, and calcining this cake in an oxidizing atmosphere, for example air at a temperature not above 500 DEG C. The carbon-dioxide-air ratio is preferably from 1:40 to 1:6, and the temperature of oxidation at least 80 DEG C. The ferric oxide may be powdered by milling with steel balls in steel containers.
Bibliography:Application Number: GB19580008301