Nonflammable, nonozone depleting, refrigerant mixtures suitable for use in mineral oil

A mixture of refrigerants that is a substitute for R-502 (48.8 weight percent chlorodifluoromethane and 51.2 weight percent chloropentafluoroethane) and R-404A (44 weight percent pentafluoroethane, 52 weight percent 1,1,1-trifluoroethane, and 4 weight percent 1,1,1,2-tetrafluoroethane) refrigerants, comprising about 55 to 93 weight percent pentafluoroethane;

• and about 5 to 25 weight percent 1,1,1,2-tetrafluoroethane;
• and about 0.5 to 7 weight percent propane;
• and about 0.5 to 7 weight percent dimethyl ether (DME);
• and about 0 to 12 weight percent 1,1,1,2,3,3,3-heptafluoropropane, with the weight percentages of the components of the mixture being weight percentages of the overall mixture.

A mixture of refrigerants that is a substitute for dichlorodifluoromethane, 1,1,1,2-tetrafluoroethane and R-500 (73.8 weight percent dichlorodifluoromethane and 26.2 weight percent 1,1-difluoroethane) refrigerants, comprising about 3 to 20 weight percent pentafluoroethane;

• and about 55 to 96 weight percent 1,1,1,2-tetrafluoroethane;
• and about 0.5 to 4 weight percent propane;
• and about 0.5 to 7 weight percent dimethyl ether (DME);
• and about 0 to 12 weight percent 1,1,1,2,3,3,3-heptafluoropropane, with the weight percentages of the components of the mixture being weight percentages of the overall mixture.

A method for producing refrigeration in a refrigeration system designed for R-502 (48.8 weight percent chlorodifluoromethane and 51.2 weight percent chloropentafluoroethane) refrigerant and R-404A (44 weight percent pentafluooethane, 52 weight percent 1,1,1-trifluoroethane, and 4 weight percent 1,1,1,2-tetrafluoroethane) refrigerants, comprising substituting for said refrigerants a mixture of about 55 to 93 weight percent pentafluoroethane;

• and about 5 to 25 weight percent 1,1,1,2-tetrafluoroethane;
• and about 0.5 to 7 weight percent propane;
• and about 0.5 to 7 weight percent dimethyl ether (DME);
• and about 0 to 12 weight percent 1,1,1,2,3,3,3-heptafluoropropane, with the weight percentages of the components of the mixture being weight percentages of the overall mixture.

A method for producing refrigeration in a refrigeration system designed for dichlorodifluoromethane, 1,1,1,2-tetrafluoroethane and R-500 (73.8 weight percent dichlorodifluoromethane and 26.2 weight percent 1,1-difluoroethane) refrigerants, comprising substituting for said refrigerants a mixture of about 3 to 20 weight percent pentafluoroethane;

• and about 55 to 96 weight percent 1,1,1,2-tetrafluoroethane;
• and about 0.5 to 4 weight percent propane;
• and about 0.5 to 7 weight percent dimethyl ether (DME);
• and about 0 to 12 weight percent 1,1,1,2,3,3,3-heptafluoropropane, with the weight percentages of the components of the mixture being weight percentages of the overall mixture.