Abstract:
The invention relates to the recovery of antimony pentachloride from catalyst solutions, which are used for the fluorination of chlorosubstituted methanes or ethanes. The process is based on the reduction of antimony pentachloride, which is dissolved in a used catalyst solution by means of trichloroethylene, at a temperature of from 100* C to 170* C. The crystalline antimony trichloride obtained precipitates from the solution and is separated from all the impurities. The antimony trichloride obtained can be re-oxidized to form antimony pentachloride by any known process.
Abstract:
FLUORINATION OF HALOGENATED ALIPHATIC HYDROCARBON IS EFFECTED BY REACTING SAID HYDROCARBONS WITH HYDROGEN FLUORIDE IN GASEOUS PHASE AT ELEVATED TEMPERATURES IN THE PRESENCE OF A CATALYST, THE EMPIRICAL COMPOSITION OF WHICH VARIES SUCH AS BETWEEN CRF1.5O1.5 AND CRF2O OR A CATALYST, THE EMPIRICAL COMPOSITION OF WHICH VARIES SUCH AS BETWEEN CRFO2 AND CRF2O.