Near-azeotropic blends for use as refrigerants

Claim 1

A near-azeotropic composition comprising pentafluoroethane and/or chlorodifluoromethane selected from the group consisting of 35 to 65 percent by weight pentafluoroethane, 30 to 60 percent by weight 1,1,1-trifluoroethane, and 3 to 15 percent by weight 1 -chloro- 1,1,2,2-tetrafluoroethane; 35 to 65 percent by weight pentafluoroethane, 30 to 60 percent by weight 1,1,1-trifluoroethane, and 3 to 15 percent by weight 1-chloro-1,2,2,2-tetrafluoroethane; 35 to 65 percent by weight pentafluoroethane, 30 to 60 percent by weight 1,1,1-trifluoroethane, and 3 to 15 percent by weight hexafluorocyclopropane; 5 to 30 percent by weight pentafluoroethane, 30 to 60 percent by weight 1,1,1-trifluoroethane, and 30 to 55 percent by weight chlorodifluoromethane; 30 to 55 percent by weight chlorodifluoromethane, 30 to 60 percent by weight 1,1,1-trifluoroethane, and 3 to 15 percent by weight 1,2,2,2-tetrafluoroethane; 1 to 98.9 percent by weight chlorodifluoromethane, 0.1 to 15 percent by weight propane, and 1.0 to 98.9 percent by weight pentafluoroethane; 60 to 90 percent by weight pentafluoroethane, 5 to 20 percent by weight fluoroethane, and 3 to 15 percent by weight 1,2,2,2-tetrafluoroethane; 30 to 50 percent by weight chlorodifluoromethane, 20 to 60 percent by weight 1,1,1 -trifluoroethane, and 10 to 45 percent by weight octafluoropropane; 35 to 65 percent by weight pentafluoroethane, 30 to 60 percent by weight 1,1,1-trifluoroethane, 3 to 15 percent by weight 1,1,2,2-tetrafluoroethane, and 3 to 15 percent by weight 1,2,2,2-tetrafluoroethane; 35 to 65 percent by weight pentafluoroethane, 30 to 60 percent by weight 1,1,1-trifluornethane, 3 to 15 percent by weight 1,2,2,2-tetrafluoroethane, and 30 to 55 percent by weight chlorodifluoromethane; 35 to 65 percent by weight pentafluoroethane, 30 to 60 percent by weight 1,1,1-trifluoroethane, 3 to 20 percent by weight 1,2,2,2-tetrafluoroethane, and 3 to 15 percent by weight 1-chloro-1,1,2,2-tetrafluoroethane; 35 to 65 percent by weight chlorodifluoromethane, 34 to 64 percent by weight pentafluoroethane and 1 to 15 percent by weight ethane; 35 to 65 percent by weight chlorodifluoromethane, 34 to 64 percent by weight pentafluoroethane and 1 to 15 percent by weight butane; 35 to 65 percent by weight chlorodifluoromethane, 34 to 64 percent by weight pentafluoroethane and 1 to 15 percent by weight isobutane; 35 to 65 percent by weight chlorodifluoromethane, 34 to 64 percent by weight pentafluoroethane and to 15 percent by weight dimethyl ether; 35 to 65 percent by weight chlorodifluoromethane, 34 to 64 percent by weight pentafluoroethane and 1 to 15 percent by weight propylene; 15 to 85 percent by weight chlorodifluoromethane, 10 to 80 percent by weight pentafluoroethane, and 5 to 45 percent by weight ditluoromethane, but excluding a composition consisting of 14 percent by weight of pentafluoroethane, 52 percent by weight of 1,1,1 -trifluoroethane and 34 percent by weight of chlorodifluoromethane.