Fused salt process for purifying zirconium and/or hafnium tetrac

Details Fused salt process for purifying zirconium and/or hafnium tetrac Fused salt process for purifying zirconium and/or hafnium tetrac

1989-11-16

1991-04-23

Lewis, Michael L.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423 76, 423 84, 423492, C01G 2504, C01G 2704

Patent

active

050098667

ABSTRACT:
Continuous production of zirconium and/or hafnium metal from a fused salt bath in which one of the salts is zirconium and/or hafnium tetrachloride is carried out by feeding additional, make-up zirconium and/or hafnium tetrachloride powder into a zirconium and/or hafnium dissolution area of the bath maintained at a dissolution temperature below which the tetrachloride will vaporize, by circulating portions of the bath into and through a separate but contiguous area maintained at a temperature at which the tetrachloride will vaporize, and by recovering the vaporized tetrachloride. It is preferred that the vaporization area of the bath be wholly surrounded by and insulated from the dissolution area of the bath.

REFERENCES:
patent: 2618531 (1952-11-01), Lindblad et al.
patent: 2744060 (1956-05-01), Eaton
patent: 2962352 (1960-11-01), Schott et al.
patent: 3098722 (1963-07-01), Carlson et al.
patent: 3966458 (1976-06-01), Spink
patent: 4021531 (1977-05-01), Besson et al.
patent: 4897116 (1990-01-01), Scheel

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