Compositions – Vaporization – or expansion – refrigeration or heat or energy...
Patent
1998-02-09
2000-09-05
Skane, Christine
Compositions
Vaporization, or expansion, refrigeration or heat or energy...
62114, C09K 504
Patent
active
061138037
ABSTRACT:
The present invention provides refrigerant blends which are replacements for chlorodifluoromethane (HCFC-22). The present blends have refrigeration characteristics which are similar to HCFC-22. The blends comprise from about 10 to about 90 weight percent of a first component selected from the group consisting of 1,1,1-trifluoroethane, difluoromethane, propane, and mixtures thereof; from about 1 to about 50 weight percent of a second component selected from the group consisting of hydrofluorocarbon having 1 to 3 carbon atoms, fluorocarbon having 1 to 3 carbon atoms, inorganic compound, and mixtures thereof having a boiling point at atmospheric pressure in the range from about -90 degrees C to less than -50 degrees C; and from about 1 to about 50 weight percent of a third component which is hydrofluorocarbon having 1 to 3 carbon atoms, other than 1,1,1-trifluoroethane, having a boiling point at atmospheric pressure in the range from about -50 degrees C to about -10 degrees C. The refrigerant compositions have a vapor pressure substantially equal to the vapor pressure of HCFC-22.
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Richard Robert G.
Shankland Ian Robert
Singh Rajiv Ratna
Allied-Signal Inc.
Collazo Marie L.
Friedenson Jay P.
Skane Christine
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