Pillsbury Madison & Sutro LLP
Chemical process
 A process for the production of difluoromethane which comprises reacting a compound of formula XYCF.sub.2 wherein X and Y are each H, Cl or Br but at least one of X and Y is an atom other than hydrogen, and in particular chlorodifluoromethane, with hydrogen at elevated temperature in the presence of a hydrogenation catalyst, in particular a catalyst comprising palladium carried on an active carbon support. 
Imperial Chemical Industries PLC
Y C C
Y02P C07C C07C
additional inventional inventional
Jenny Geoffrey James
O'Kell Moore