Physical properties of fluorinated propane and butane derivatives and the vapor pressure of R-245ca/338mccq mixtures as R-11 alternatives
- Clemson Univ., SC (United States). Chemistry Dept.
- Xerox Research Center of Canada, Mississauga, Ontario (Canada)
Two new fluorinated propane derivatives, six new fluorinated butane derivatives,and the R-245ca(HCF{sub 2}CF{sub 2}CH{sub 2}F)/338mccq(CF{sub 3}CF{sub 2}CH{sub 2}CH{sub 2}F) mixtures are investigated as R-11 alternatives. The investigations on the pure chemicals included measurements of the melting point, boiling point, vapor pressure below the boiling point, heat of vaporization at the boiling point, saturated liquid density, and critical properties (temperature and density). Four of the butane derivatives--R-338mcfm, R-356mffm, R-356mecs, and R-356mms--have boiling points comparable to that of R-11 and have potential as far-term R-11 alternatives. The vapor pressures of the R-245ca/338mccq mixtures were measured over the entire concentration range for temperatures ranging from 25 C (77 F) to 135 C (275 F). The mixtures form an azeotrope at 0.64 R-245ca mole fraction with a normal boiling point of 22.6 C (72.7 F).
- OSTI ID:
- 392463
- Report Number(s):
- CONF-960254--
- Country of Publication:
- United States
- Language:
- English
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