Process for recovery of niobium values for use in preparing...

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

C - Chemistry, Metallurgy

22

B

53/143, 53/159

C22B 34/24 (2006.01) C01G 33/00 (2006.01)

Patent

CA 1116409

ABSTRACT OF THE DISCLOSURE The invention disclosed provides a process for recover- ing niobium values from aqueous hydrofluoric acid solutions by evaporating said solution to dryness and baking the residue at temperatures of 150° to 250°C. The solid residue is niobium oxyfluoride (NbO2F) 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 eva- porated hydrofluoric acid may be recovered by condensing or absorbing the evolved vapors.

324930

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