Hydrofluorocarbon/trifluoroiodomethane/ hydrocarbons refrigerant compositions
View Patent ↗A composition comprising from about 40 weight percent to about 99.9 weight percent of at least one C 1 -C 5 hydrofluorocarbon, from about 0.1 weight percent to about 50 weight percent of CF3I, and from about 0.1 weight percent to about 10 weight percent of at least one C 1 -C 6 hydrocarbon and the use of these composition for in methods of the recharging of refrigeration systems.
1. A single phase composition consisting essentially of: (a) not less than about 40 weight percent of a blend comprising difluoromethane (R-32) and 1,1,1,2,2-pentafluoroethane (R-125); (b) from about 38.3 weight percent to about 48.3 weight percent of CF 3 I; (c) optionally isobutane and/or n-butane; and (d) about 0.2% or greater of lubricant, wherein the composition is a single-phase composition.
2. The composition of claim 1 wherein said blend is non-azeotropic.
3. The composition of claim 2 wherein said lubricant is selected from mineral oil, hydrocarbon oil, alkyl oil, alkyl benzene oil, white or paraffinic oil, and mixtures thereof.
4. The composition of claim 2 wherein said lubricant comprises mineral oil.
5. The composition of claim 2 wherein said lubricant comprises alkyl benzene oil.
6. The composition of claim 1 wherein the isobutane and/or n-butane is present in an amount of from about 0.1 weight percent to about 8 weight percent.
7. The composition of claim 1 wherein the isobutane and/or n-butane is present in an amount of from about 0.1 weight percent to about 5 weight percent.
8. The composition of claim 1 wherein said lubricant comprises mineral oil.
9. The composition of claim 1 wherein said lubricant comprises alkyl benzene oil.
10. The composition of claim 1 wherein said lubricant is selected from mineral oil, hydrocarbon oil, alkyl oil, alkyl benzene oil, white or paraffinic oil, and mixtures thereof.