Near-azeotropic ternary compositions constituted by...

Details Near-azeotropic ternary compositions constituted by... Near-azeotropic ternary compositions constituted by...

2011-08-30

2011-08-30

Webb, Gregory W (Department: 1761)

Compositions

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

Reissue Patent

active

RE042652

ABSTRACT:
Near-azeotropic ternary compositions of hydrofluorocarbons with n-butane or isobutane selected from:A)1,1,1,2-tetrafluoroethane (R134a)65-94%by weightpentafluoroethane (R125)2-25%by weightn-butane (R600) and/or isobutane (R-600a)1-10%by weightB)1,1,1,2-tetrafluoroethane (R134a)65-94%by weight1,1,1,2,3,3,3-heptafluoropropane (R227ea)5-25%by weightn-butane (R600) and/or isobutane (R-600a)1-10%by weightSaid compositions have zero ODP, very low GWP and good solvent power for mineral lubricants. They are utilizable as drop-in substituents of R-12 in domestic refrigeration.

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