(JP5509113-W)      Near-azeotropic compsns. comprise (i) 35-65% (pref. 55%) pentafluoroethane, HFC-125 (I); (ii) 30-60% (pref. 40%) 1,1,1-trifluoroethane, HFC-143a (II); (iii) 3-15% (pref. 5%) 1,1,2-tetrafluoroethane HFC-134 (III) or 1,2,2,2-tetrafluoroethane HFC-134a (IV), 1-chloro-1,1,2,2-tetrafluoroethane HFC-124a (V) 1-chloro-1,2,2,2 -tetrafluoroethane HFC-124 (VI), 1,1,1,2,3,3,3 heptafluoropropane HFC-227ea (VII), 1,1,1,2,2,3,3 heptafluoropropane HFC-227 ca (VIII) or hexafluoro cycloporpane FC-216( IX); and compsns. where (i), (ii) and/or (iii) are partly replaced with chlorodifluoro metahen (X), fluoroethane, propane isobutane, dimethylether or propylene. A process for producing refrigeration by evaporating a near- azeotropic compsn. in the vicinity of a body to be cooled is also claimed.    ADVANTAGE -   The compsns. have vapour pressures equal to that of Refrigerants-802, are non-flammable and considered to be environmentally safe substitutes. The compsns. will not fractionate and minimises the problem of handling in system operations. The use of the compsns. have 10-15% decrease in energy efficiencies.    (JP8034974-A)      A near-azeotropic compsn. comprises (a) 35-65 wt. % pentafluoroethane, (b) 30-60 wt. % 1,1,1-trifluoroethane, and (c) 3-15 wt. % 1,2,2,2-tetrafluoroethane. The compsn. has a vapour pressure of 163-179 psia at 24 deg.C and exhibits a change in vapour pressure of less than 7% after 80 wt. % of the compsn. is lost by evaporation; and the amt. of 1,1,1-trifluoroethane does not increase after 70 wt. % of the compsn. is lost by evaporation.    Also claimed is the prodn. of refrigeration comprising evaporating a near-azeotropic compsn. in the vicinity of a body to be cooled.    USE/ADVANTAGE -   Used as refrigerants. The compsns. can be prepd. simply, maintain their refrigerant properties over a wide range of compsns. and have a reduced ozone depletion potential.    In an example, a refrigerant compsn. was prepd. comprising 55 wt. % pentafluoroethane, 40 wt. % 1,1,1-trifluoroethane, and 5 wt. % perfluorocyclopropane. The vapour pressure at 0% evaporation was 179.5 psi and 174.8 psia at 80% evaporation, the change in vapour pressure being 2.6%. The vapour pressure versus leak performance behaviour closely approximated that of 'Refrigerant 502' (RTM: medium - low temp. refrigerant).    (JP2554455-B2)      Near-azeotropic compsns. comprise (i) 35-65% (pref. 55%) pentafluoroethane, HFC-125 (I); (ii) 30-60% (pref. 40%) 1,1,1-trifluoroethane, HFC-143a (II); (iii) 3-15% (pref. 5%) 1,1,2-tetrafluoroethane HFC-134 (III) or 1,2,2,2-tetrafluoroethane HFC-134a (IV), 1-chloro-1,1,2,2-tetrafluoroethane HFC-124a (V) 1-chloro-1,2,2,2-tetrafluoroethane HFC-124 (VI), 1,1,1,2,3,3,3- heptafluoropropane HFC-227ea (VII), 1,1,1,2,2,3,3- heptafluoropropane HFC-227ca (VIII) or hexafluorocyclopropane FC-C216 (IX); and compsns. where (i), (ii) and/or (iii) are partly replaced with chlorodifluoromethane (X), fluoroethane, propane isobutane, dimethylether or propylene.    ADVANTAGE -   The compsns. have vapour pressures equal to that of Refrigerants-802, are non-flammable and considered to be environmentally safe substitutes. The compsns. will not fractionate and minimises the problem of handling in system operations. The use of the compsns. have 10-15% decrease in energy efficiencies.    (JP2561988-B2)      Near-azeotropic compsns. comprise (i) 35-65% (pref. 55%) pentafluoroethane, HFC-125 (I); (ii) 30-60% (pref. 40%) 1,1,1-trifluoroethane, HFC-143a (II); (iii) 3-15% (pref. 5%) 1,1,2-tetrafluoroethane HFC-134 (III) or 1,2,2,2-tetralfuoroethane HFC-134a (IV), 1-chloro-1,1,2,2-tetrafluoroethane HFC-124a (V) 1-chloro-1,2,2,2-tetrafluoroethane HFC-124 (VI), 1,1,1,2,3,3,3-heptafluoropropane HFC-227ea (VII), 1,1,1,2,2,3,3-heptafluoropropane HFC-227ca (VIII) or hexafluorocyclopropane FC-C216 (IX): and compsns. where (i), (ii) and/or (iii) are partly replaced with chlorodifluoromethane (X), fluoroethane, propane isobutane, dimethylether or propylene.    A process for producing refrigeration by evaporating a near-azeotropic compsn. in the vicinity of a body to be cooled is also claimed.    ADVANTAGE -   The compsns. have vapour pressures equal to that of Refrigerants-802, are non-flammable and considered to be environmentally safe substitutes. The compsns. will not fractionate and minimises the problem of handling in system operations. The use of the compsns. have 10-15% decrease in energy efficiencies.    (JP3086802-B2)      Near-azeotropic compsns. comprise (i) 35-65% (pref. 55%) pentafluoroethane, HFC-125 (I); (ii) 30-60% (pref. 40%) 1,1,1-trifluoroethane, HFC-143a (II); (iii) 3-15% (pref. 5%) 1,1,2-tetrafluoroethane HFC-134 (III) or 1,2,2,2-tetrafluoroethane HFC-134a (IV), 1-chloro-1,1,2,2-tetrafluoroethane HFC-124a (V) 1-chloro-1,2,2,2-tetrafluoroethane HFC-124 (VI), 1,1,1,2,3,3,3- heptafluoropropane HFC-227ea (VII), 1,1,1,2,2,3,3- heptafluoropropane HFC-227ca (VIII) or hexafluorocyclopropane FC-C216 (IX): and compsns. where (i), (ii) and/or (iii) are partly replaced with chlorodifluoromethane (X), fluoroethane, propane isobutane, dimethylether or propylene.    A process for producing refrigeration by evaporating a near-azeotropic compsn. in the vicinity of a body to be cooled is also claimed.    ADVANTAGE -   The compsns. have vapour pressures equal to that of Refrigerants-802, are non-flammable and considered to be environmentally safe substitutes. The compsns. will not fractionate and minimises the problem of handling in system operations. The use of the compsns. have 10-15% decrease in energy efficiencies.