Distillation: processes – separatory – With chemical reaction – Including step of adding catalyst or reacting material
Patent
1988-09-12
1989-09-12
Bascomb, Wilbur
Distillation: processes, separatory
With chemical reaction
Including step of adding catalyst or reacting material
203 50, 203DIG16, 75 845, 204 64T, 204130, 423 73, 423492, B01D 300, C01G 2504, C01G 2704, C22B 3414
Patent
active
048656941
ABSTRACT:
This is an improved method for separating hafnium from zirconium of the type where a complex of zirconium and hafnium chlorides and phosphorus oxychloride is prepared from zirconium-hafnium chloride and the complex is introduced into a distillation column, with the improvement comprising: electrochemical breaking of the zirconium of hafnium chloride complex taken from said distillation column to separate product from the complex. The electrochemical breaking of the complex, possibly by reducing zirconium or hafnium, is done in a molten salt bath. Preferably, the molten salt in said molten salt bath consists principally of a mixture of alkali metal and alkaline earth metal chlorides and zirconium or hafnium chloride. The product can be either chloride, metal, or mixed metal and subchloride for further processing.
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McLaughlin David F.
Snyder Thomas S.
Stoltz Richard A.
Bascomb Wilbur
Stoltz R. A.
Westinghouse Electric Corp.
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