PRODUCTION OF ACICULAR PARTICLE CONTAINING IRON CARBIDE

PRODUCTION OF ACICULAR PARTICLE CONTAINING IRON CARBIDE

PURPOSE:To produce acicular particle containing iron carbide, by contacting acicular beta-FeOOH or its dehydrated product with CO or a mixture of CO and H2. CONSTITUTION:Acicular beta-FeOOH is treated with an alkaline aqueous solution, e.g. with 1-10N NaOH solution at 30-100 deg.C for >=0.5hr. Th...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: DAIMON SHIGEO, SHIBUYA YOSHIYUKI
Format: Patent
Sprache:eng
Schlagworte:
CASTING
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
MAKING METALLIC POWDER
MANUFACTURE OF ARTICLES FROM METALLIC POWDER
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:PURPOSE:To produce acicular particle containing iron carbide, by contacting acicular beta-FeOOH or its dehydrated product with CO or a mixture of CO and H2. CONSTITUTION:Acicular beta-FeOOH is treated with an alkaline aqueous solution, e.g. with 1-10N NaOH solution at 30-100 deg.C for >=0.5hr. The beta-FeOOH is if necessary heated and dehydrated at 200-700 deg.C to alpha-Fe2O3, and is made to contact with CO or a mixture of CO and H2 at 250-400 deg.C to obtain acicular particle containing iron carbide. When a mixture of CO and H2 is used as a reactant, the volume ratio of CO/H2 is preferably