The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 03, 1977
Filed:
Apr. 15, 1976
Paul Besson, La Chambre, FR;
Jean Guerin, Grenoble, FR;
Pierre Brun, Grenoble, FR;
Michel Bakes, La Celle-Saint-Cloud, FR;
Ugine Aciers, Paris, FR;
Abstract
The invention relates to a process for the separation of zirconium, and hafnium tetrachlorides from mixtures thereof. The process according to the invention consists of selectively absorbing zirconium tetrachloride and hafnium tetrachloride vapors in a solvent medium circulating counter-current to these vapors in a distillation column, wherein the solvent consists of a molten chloroaluminate and/or chloroferrate of potassium. The process described may be used to obtain hafnium-free zirconium tetrachloride which may then be used to prepare nuclear-grade zirconium, and hafnium tetrachloride containing little zirconium.