Process for preparing metals from their fluorine- containing...

Details Process for preparing metals from their fluorine- containing... Process for preparing metals from their fluorine- containing...

C - Chemistry, Metallurgy

22

B

53/347

C22B 5/12 (2006.01) B22F 9/22 (2006.01) C01B 9/08 (2006.01)

Patent

CA 1185097

ABSTRACT A process for preparing high purity superfine powders of less than 0.5µ diameter of Mo, W, Nb, Zr, Cu, Zn, Co, Ni and In by first producing their fluoride or a double fluoride with ammonium and then decomposing them under heat in a hydrogen-containing stream. Features of the present process are that the double fluoride of the metals with ammonium is faster in crystal growth than their fluoride, recrystallization of these salts can be repeated as desired when a high purity of the metals is required, and particles of a uniform size can be obtained easier.

390227

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