Process for the recovery of antimony-based catalysts used for th

Details Process for the recovery of antimony-based catalysts used for th Process for the recovery of antimony-based catalysts used for th

1992-01-29

1993-03-30

Shine, W. J.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group va metal or arsenic

423 87, 423491, 502 35, C01B 2900

Patent

active

051981998

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.

REFERENCES:
patent: 3784671 (1974-01-01), Joerchel et al.
patent: 4070439 (1978-01-01), Osaka et al.
patent: 4722774 (1988-02-01), Hyatt

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