Process for introducing zirconium tetrachloride, hafnium tetrach

Details Process for introducing zirconium tetrachloride, hafnium tetrach Process for introducing zirconium tetrachloride, hafnium tetrach

1989-03-06

1990-04-17

Bascomb, Wilbur

Distillation: processes, separatory

Adding material to distilland except water or steam per se

203 77, 203 91, 203DIG16, 23294R, 202153, 202176, 266146, 423 76, 423 78, 423 84, B01D 340, C01G 2504, C01G 2704

Patent

active

049177737

ABSTRACT:
The process and the device according to the invention relate to the introduction, at a stable, known flow rate, of sublimable tetrachloride into a column for continuous extractive distillation under pressure of the chlorides. The sublimable tetrachloride is dissolved in a hot dissolver in a liquid solvent such as KAlCl.sub.4, and is then recirculated by pump at a stable, known flow rate into an evaporator connected to the column. The solution is then heated in an evaporator in order to sublime the majority of the product which it contains, the sublimed vapors thus passing into the column at a stable, known flow rate. The process according to the invention is adapted, in particular, to a plant for the production of ArCl.sub.4 of nulear purity and of HfCl.sub.4.

REFERENCES:
patent: 2816814 (1957-12-01), Plucknett
patent: 2852446 (1958-09-01), Bromberg
patent: 3098722 (1963-07-01), Carlson et al.
patent: 3671186 (1972-06-01), Ishizuka
patent: 3966458 (1976-06-01), Spink
patent: 4021531 (1977-05-01), Besson et al.
patent: 4737244 (1988-04-01), McLaughlin et al.
patent: 4749448 (1988-06-01), Stoltz et al.

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