Separation of zirconium and hafnium

Details Separation of zirconium and hafnium Separation of zirconium and hafnium

1974-09-06

1976-06-29

Padgett, Benjamin R.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

75 844, 423 73, 423 75, 423492, C22B 6102

Patent

active

039664589

ABSTRACT:
A process is provided for separating zirconium and hafnium tetrachlorides by the direct distillation from their solution in an eutectic mixture of sodium and potassium chlorides. Hafnium tetrachloride and zirconium tetrachloride are provided in adequate purity for direct introduction into reduction units for the production of the respective metals by virtue of controlled ratios of the salt eutectic solvent to the hafnium and zirconium tetrachlorides and by provision of a reflux of hafnium with added increments of the eutectic solvent salt mixture.

REFERENCES:
patent: 2744060 (1956-05-01), Eaton
patent: 2791485 (1957-05-01), Newnham
patent: 2961293 (1960-11-01), Newnham
patent: 3671186 (1972-06-01), Ishizuka

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