Zirconium and hafnium tetrachloride separation by extractive dis

Distillation: processes – separatory – Adding material to distilland except water or steam per se – At least two materials

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203 84, 423 73, 423 76, 423492, B01D 340, C01G 2504, C01G 2704

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active

047372443

ABSTRACT:
This is a molten salt extractive distillation process for separating hafnium from zirconium. It utilizes at least principally a ZnCl.sub.2 -PbCl.sub.2 molten salt solvent, and preferably ZnCl.sub.2 -PbCl.sub.2 in a near eutectic or eutectic mixture. The extraction column is preferably run about 370.degree.-390.degree. C. at about one atomosphere and stripping is preferably done at 375.degree.-400.degree. C. utilizing an inert gas carrier.

REFERENCES:
patent: 1582860 (1926-04-01), van Arkel
patent: 2741628 (1956-04-01), Plucknett
patent: 2744060 (1956-05-01), Eaton
patent: 2791485 (1957-05-01), Newnham
patent: 2816814 (1957-12-01), Plucknett
patent: 2852446 (1958-09-01), Bromberg
patent: 2928722 (1960-03-01), Scheller
patent: 2938769 (1960-05-01), Overholser
patent: 3006719 (1961-10-01), Miller
patent: 3671186 (1972-06-01), Ishizuka
patent: 3966458 (1976-06-01), Spink
patent: 4021531 (1977-05-01), Besson
patent: 4072506 (1978-02-01), Megy
Niselson et al.; "The Solid-Liquid Equilibria in Binary Systems Formed by ZrCl.sub.4 HfCl.sub.4, SnCl.sub.2, ZnCl.sub.2 and BiCl.sub.3 "; Jan. 1961; pp. 92-95, vol. 6, #1.
Bloom and Weeks; "Viscosities of Sodium Chloride and Zinc Chloride Melts"; Trans. Faraday Soc.; 67, (1971) pp. 1420-1425.
Mackenzie and Murphy; "Structure of Glass-Forming Halides. II. Liquid Zinc Chloride"; J. of Chemical Physics, vol. 33, No. 2 (Aug. 1960) pp. 366-369.
Plucknett, Hansen & Duke; "Progress Report in Physical and Inorganic Chemistry Group II, III & IV" (Nov. 1, 1948-Apr. 30, 1949), ISC-51, 14 pp. (esp. pp. 8-9).
Hudswell & Hutcheon; "Methods of Separating Zirconium from Hafnium and Their Technical Implications"; Peaceful Uses of Atomic Energy (1955-56); pp. 563-564.
Dutrizac & Flengas; "Pressure-Temperature Measurements of Alkali and Alkalive-earth Complex Chlorides of Zr and Hf"; Advan. Extr. Met. Prop. Symp. (London '67) 28 pages (esp. 20-21).

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