PREPARATION OF IRON OXYHYDROXIDE

PREPARATION OF IRON OXYHYDROXIDE

PURPOSE:To prepare iron oxyhydroxide in an extremely short reaction time, by adding an aqueous solution of an alkali ferrate to an alkaline aqueous solution and decomposing the alkali ferrate. CONSTITUTION:The alkali ferrate used as the starting material is represented by the general formula M2FeO4...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: MORISHITA TOSHIHIKO, TAKATSU SHIYOUZOU
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
ELECTRICITY
INDUCTANCES
INORGANIC CHEMISTRY
MAGNETS
METALLURGY
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
TRANSFORMERS
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Beschreibung
Zusammenfassung:PURPOSE:To prepare iron oxyhydroxide in an extremely short reaction time, by adding an aqueous solution of an alkali ferrate to an alkaline aqueous solution and decomposing the alkali ferrate. CONSTITUTION:The alkali ferrate used as the starting material is represented by the general formula M2FeO4 (M is Na or K), e.g. sodium ferrate or potassium ferrate. The concentration of the alkali ferrate depends upon the use of the produced iron oxyhydroxide; however, it is generally about 0.1-20wt% as Fe2O3. The alkali used in the alkali decomposition is sodium hydroxide or potassium hydroxide, and its amount is usually about