Hydrous trivalent chromium oxide/carbon particles

Disclosed is a method of making particles which comprise hydrous trivalent chromium oxide having the empirical formula CrO2H intimately associated with a pulverulent carbonaceous substrate. A composition is formed which comprises an aqueous solution of water-soluble hexavalent chromium compound and...

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Bibliographische Detailangaben
Hauptverfasser:	MORGAN, RUSSELL J, STAMBAUGH, EDGEL P
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CASTING CHEMISTRY COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F COMPOUNDS THEREOF FERROUS OR NON-FERROUS ALLOYS INORGANIC CHEMISTRY MAKING METALLIC POWDER MANUFACTURE OF ARTICLES FROM METALLIC POWDER METALLURGY NON-METALLIC ELEMENTS PERFORMING OPERATIONS POWDER METALLURGY PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TRANSPORTING TREATMENT OF ALLOYS OR NON-FERROUS METALS WORKING METALLIC POWDER
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Beschreibung
Zusammenfassung:	Disclosed is a method of making particles which comprise hydrous trivalent chromium oxide having the empirical formula CrO2H intimately associated with a pulverulent carbonaceous substrate. A composition is formed which comprises an aqueous solution of water-soluble hexavalent chromium compound and a reducing agent in an amount sufficient to reduce the hexavalent chromium compound to the hydrous trivalent chromium oxide and to reduce the hydrous trivalent chromium oxide to metallic chromium. The reducing agent comprises a water-insoluble pulverulent carbonaceous substrate. Chrome metal can be made by heating the particles at a temperature of about 1100 to about 1400 DEG C.