Method for separating zirconium and hafnium tetrachlorides...

Details Method for separating zirconium and hafnium tetrachlorides... Method for separating zirconium and hafnium tetrachlorides...

2005-08-16

2005-08-16

Nguyen, Ngoc-Yen (Department: 1754)

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

C423S076000, C423S084000, C423SDIG001, C423S210500, C423S492000

Reexamination Certificate

active

06929786

ABSTRACT:
A method of separating zirconium and hafnium tetrachlorides using a solvent comprising firstly an alkaline metallic solvent comprising a salt made up of an alkali metal chloride and an acidic metal chloride A, for example a chloroaluminate or an alkaline chloroferrate, and secondly an acidic metal or metalloid chloride B of acidity that is less than that of the acidic metal chloride A. The acidic metal or metalloid chloride B may be selected from chlorides of Mg, Zn, and Cu. The method may be a continuous separation method by selective absorption of the tetrachloride vapors by the solvent in the substantially or totally molten state.

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Tricot R: “Metallurgie, Proprietes Et Emploi Du Hafnium” Memoires Et Etudes Scientifiques De La Revue De Metallurgie, Revue De Metallurgie. Paris, FR, vol. 88, No. 11. Nov. 1, 1991, pp. 747-759, XP000278165 ISSN: 0245-8292 p. 751; figure 1*.

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