Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group vb metal
Patent
1992-07-07
1993-05-18
Lewis, Michael
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group vb metal
423138, 423325, 423344, 423406, 423409, 423592, 423644, C01G 3300, C01G 3100, C01G 3500, C01B 33113
Patent
active
052119211
ABSTRACT:
A process for making metal oxides including niobium or tantalum oxides from ferro and nickel alloys containing these metals involving the multiple steps of hydriding the ferro or nickel alloy selected, under conditions of suitable temperature and pressure to render the alloys friable, subdividing the hydrided product into selected particle sizes, then nitriding with a nitrogen-containing gas at elevated temperatures above 500.degree. C. to form the alloy constituent nitrides, thereafter leaching the nitrides formed with aqueous acid to separate the formed ferro or nickel nitride from the acid soluble nitrides from the acid insoluble nitrides, calcining the acid insoluble nitrides with oxygen-containing gas under conditions suitable for the formation of the metal oxide of the acid soluble nitride.
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Perkins Verlin Q.
Sommers James A.
Kalinchak Stephen G.
Lewis Michael
Teledyne Industries Inc.
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