Patent ID: 6232514
Filing Date: 2001-05-15
Classification: B01J,C07C

Abstract:
Process for preparing pentafluoroethane (HFC-125) with a conversion of over 80%, comprising:preparing a catalyst consisting essentially of Cr.sub.2 O.sub.3 supported on preformed AlF.sub.3 by soaking AlF.sub.3 in an aqueous solution of a soluble Cr (III) salt, drying said soaked AlF.sub.3, and activating the catalyst in air or nitrogen at 200-600.degree. C. so that the catalyst has catalytic activity; andreacting 1,1,1-trifluorodichloroethane (HCFC-123) with HF at a temperature from 310.degree. to 380.degree. C. in the presence of said catalyst and with a contact time of from 1 to 10 seconds.