(EP492777-A2)      Compsn. comprises a mixt. of: (i) chlorodifluoromethane (R22) or pentafluoroethane (R125), pref. at 50-95 wt.%; (ii) pentafluoroethane (R125) or octafluoropropane (R218), pref. at 3-35 wt.%; and (iii) propylene (R1270) or a propylene-propane mixt. (R290), pref. at 2-20 wt.%, the proportions being such that the mixt. is non-flammable.    Appts for and methods of vapour compression refrigeration in which the compsn. is used are also claimed.    USE/ADVANTAGE -   The compsn. provides a refrigerant which avoids CCl2F2 (R12) and CClF2CF3 + CHClF2 azeotrope (R502), which are implicated in causing environmental damage via breakdown of the ozone layer. The mixt. can be formulated to be non-flammable despite the presence of (iii).    (EP492777-A3)      Compsn. comprises a mixt. of: (i) chlorodifluoromethane (R22) or pentafluoroethane (R125), pref. at 50-95 wt. %; (ii) pentafluoroethane (R125) or octafluoropropane (R218), pref. at 3-35 wt. %; and (iii) propylene (R1270) or a propylene-propane mixt. (R290), pref. at 2-20 wt. %, the proportions being such that the mixt. is non-flammable.    Appts. for and methods of vapour compression refrigeration in which the compsn. is used are also claimed.    USE/ADVANTAGE -   The compsn. provides a refrigerant which avoids CC12F2 (R12) and CC1F2CF3 + CHC1F2 azeotrope (R502) which are implicated in causing environmental damage via breakdown of the ozone layer. The mixt. can be formulated to be non-flammable despite the presence of (iii)    (GB2250514-B)      A non-flammable refrigerant composition for use in a refrigerant apparatus which comprises a mixture of three different components: (i) a refrigerant selected from chlorodifluoromethane and pentafluoroethane; (ii) a refrigerant selected from pentafluoroethane and octafluoropropane; and (iii) a hydrocarbon selected from propylene, and propylene-propane mixtures; in non-flammable proportions.    (EP492777-B1)      A non-flammable refrigerant compsn. for use in a refrigerant appts. which comprises a mixt. of three different components (i) a refrigerant selected from chlorodifluoromethane and pentafluoroethane, (ii) a refrigerant selected from pentafluoroethane and octafluoropropane, and (iii) a hydrocarbon selected from propylene and propylene-propane mixts., in non-flammable proportions.