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:
Mar. 30, 1993
Filed:
Jan. 29, 1992
Applicant:
Inventors:
Eric LaCroix, Lyons, FR;
Andre Lantz, Vernaison, FR;
Assignee:
ELF Atochem S.A., , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423 88 ; 423 87 ; 423491 ; 502 35 ;
Abstract
To recover the antimony contained in a solution of use antimony-containing catalyst, emananting from units for the fluorination or chlorofluorination of halogenated hydrocarbons comprising at least two carbon atoms, the solution is concentrated to the limit of distillation of antimony trichloride, an excess of chlorine is then added to convert SbCl.sub.3 to SbCl.sub.5, and SbCl.sub.5 is distilled under reduced pressure without exceeding 120.degree. C. The recoverd antimony pentachloride is sufficiently pure to be able to be recycled directly to the fluorination reactor.