Process of separation of hafnium from zirconium by molten...

Details Process of separation of hafnium from zirconium by molten... Process of separation of hafnium from zirconium by molten...

C - Chemistry, Metallurgy

25

C

204/46.1

C25C 3/26 (2006.01) C01G 25/04 (2006.01) C01G 27/04 (2006.01)

Patent

CA 1324106

Abstract of the Disclosure A process of separation of hafnium from zirconium by molten salt eletrolysis in which zirconium tetrachloride with ordinary hafnium tetrachloride content is dissolved in a molten salt and the zirconium tetrachloride is electrolytically reduced to zirconium trichloride with lower hafnium content at a cathode in the molten salt and hafnium tetrachloride is remained. Next, the cathode on which the zirconium trichloride is formed by the cathode reaction is used as an anode. The electrolytic reduction of zirconium tetrachloride at another cathode in the molten salt is carried out and at the same time the zirconium trichloride formed on the anode is oxidized to zirconium tetrachloride with a low hafnium content and the zirconium tetrachloride is evaporated for separation. The obtained zirconium tetrachloride containing a low hafnium content is suitable for production of reactor grade zirconium containing about 100ppm of hafnium.

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