Hydrofluorocarbon compositions

Details Hydrofluorocarbon compositions Hydrofluorocarbon compositions

1994-03-11

1995-05-23

Skaling, Linda

Compositions

Vaporization, or expansion, refrigeration or heat or energy...

62114, 252 8, 252172, 252194, 252305, 252364, 252571, 252DIG9, 264DIG5, C09K 504, C09K 330, C11D 750, C08J 914

Patent

active

054178711

ABSTRACT:
Refrigerant compositions include mixtures of difluoromethane and isobutane, butane, propylene or cyclopropane; pentafluoroethane and propylene or cyclopropane; 1,1,2,2-tetrafluoroethane and propane; 1,1,1,2-tetrafluoroethane and cyclopropane; 1,1,1-trifluoroethane and DME or propylene; 1,1-difluoroethane and propane, isobutane, butane or cyclopropane; fluoroethane and propane or cyclopropane; 1,1,1,2,2,3,3-heptafluoropropane and butane, cyclopropane, DME, isobutane or propane; or 1,1,1,2,3,3,3-heptafluoropropane and butane, cyclopropane, isobutane or propane.

REFERENCES:
patent: 3777934 (1973-12-01), Meeks et al.
patent: 4482465 (1984-11-01), Gray
patent: 4810403 (1989-03-01), Bivens et al.
patent: 5140824 (1992-08-01), Hunt
patent: 5234613 (1993-08-01), Shiflett
patent: 5277834 (1994-01-01), Bivens et al.
Research Disclosure, Mar. 1977 disclosure No. 15505 "Azeotropes comprising hydrogen-containing fluorocarbors and hydrocarbons" disclosed by E. I. du Pont de Nemours.

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