Process for recovery of niobium values for use in preparing niob

Details Process for recovery of niobium values for use in preparing niob Process for recovery of niobium values for use in preparing niob

1978-04-28

1979-08-14

Hunt, Brooks H.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 27, 75101R, 75174, 423 62, 423 63, 423 64, 423 65, 423 66, 423472, C22B 3424, C22C 2702

Patent

active

041644174

ABSTRACT:
The invention disclosed provides a process for recovering niobium values from aqueous hydrofluoric acid solutions by evaporating said solution to dryness and baking the residue at temperatures of 150.degree. to 250.degree. C. The solid residue is niobium oxyfluroide (NbO.sub.2 F) which may then be exothermically reduced with aluminum in the presence of an alloying element such as iron, nickel, or chromium to produce a niobium alloy. The evaporated hydrofluoric acid may be recovered by condensing or absorbing the evolved vapors.

REFERENCES:
patent: 2905548 (1959-09-01), Taylor et al.
patent: 2953453 (1960-09-01), Foos
patent: 3523128 (1970-08-01), Bielecki et al.
patent: 3597192 (1971-08-01), Wilhelm et al.
patent: 3712939 (1973-01-01), Capps et al.

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