Fluidized bed reactor for preparing metal nitride

Details Fluidized bed reactor for preparing metal nitride Fluidized bed reactor for preparing metal nitride

1996-01-31

1996-11-12

Hoang, Tu

Electric heating

Heating devices

Combined with container, enclosure, or support for material...

219651, 219686, 373111, 422142, F27B 514

Patent

active

055736890

ABSTRACT:
In a fluidized bed reactor for preparing a metal nitride by feeding metal powder and a non-oxidizing gas containing N.sub.2 or NH.sub.3 into a reaction tube (1) to form a fluidized bed (2) therein and heating the fluidized bed for nitriding the metal powder, an envelope (11) encloses the reaction tube (1) for preventing the surrounding air from entering the reaction tube. A heater (9) is disposed outside the envelope (11) for heating the fluidized bed (2) to 1,200.degree. C. or higher. The envelope prevents penetration of the surrounding air into the reaction tube and also prevents deterioration of the heater and surrounding components by scattering of metal fines. The reactor ensures safe operation to prepare metal nitride powder of high purity on an industrial scale.

REFERENCES:
patent: 4950870 (1990-08-01), Mitsuhashi et al.
patent: 5057668 (1991-10-01), Gisdakis et al.
patent: 5245158 (1993-09-01), Hashizume et al.
patent: 5374413 (1994-12-01), Kim et al.

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