Molecular sieve 13X adsorbing CFC-113 was irradiated with gamma-rays a
nd then was soaked in water. The concentrations of Cl- and F- of the s
upernatant solutions increased with irradiation time, indicating that
both defluorination and dechlorination of CFC-113 occur. The dechlorin
ation proceeds by a chain react;on when 2-propanol is adsorbed on the
molecular sieve together with CFC-113. It is suggested that the dehalo
genation of CFC-113 is promoted by the molecular sieve.