Near azeotropic mixture substitute

Details Near azeotropic mixture substitute Near azeotropic mixture substitute

1994-03-11

1996-06-04

Skane, Christine

Compositions

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

62114, C09K 504

Patent

active

055230113

ABSTRACT:
The present invention comprises a refrigerant mixture consisting of a first mole fraction of 1,1,1,2-tetrafluoroethane (R134a) and a second mole fraction of a component selected from the group consisting of a mixture of CHClFCF.sub.3 (R124) and CH.sub.3 CClF.sub.2 (R142b); a mixture of CHF.sub.2 CH.sub.3 (R152a) and CHClFCF.sub.3 (R124); a mixture of CHF.sub.2 CH.sub.3 (R152a) and CH.sub.3 CClF.sub.2 (R142b); and a mixture of CHClFCF.sub.3 (R124), CH.sub.3 CClF.sub.2 (R142b) and CHF.sub.2 CH.sub.3 (R152a).

REFERENCES:
patent: 4155865 (1979-05-01), Ostrozynski et al.
patent: 4810403 (1989-03-01), Bivens et al.
patent: 4983312 (1991-01-01), Tamura et al.
patent: 5262077 (1993-11-01), Bivens et al.
patent: 5304319 (1994-04-01), Yoshida et al.

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