Azeotropic mixture with 1,1,1-trifluoroethane and propane a low

Details Azeotropic mixture with 1,1,1-trifluoroethane and propane a low Azeotropic mixture with 1,1,1-trifluoroethane and propane a low

1991-04-02

1992-01-14

Lieberman, Paul

Compositions

Water-softening or purifying or scale-inhibiting agents

62114, 203 67, 252 67, 252162, 252305, 252364, 252DIG9, 264 53, 264DIG5, 521 98, 521131, C11D 750, C08J 914, C09K 330, C09K 504

Patent

active

050808230

ABSTRACT:
The invention relates to an azeotrope with a minimum boiling point, capable of being employed as a refrigerating fluid replacing trifluorobromomethane (Halon 1301) in industrial refrigeration systems at very low temperature with single-stage compression.
The azeotrope according to the invention is a mixture of 1,1,1-trifluoroethane (HFA 143a) and of propane (R290). At the normal boiling point (approximately -53.4.degree. C. at 1.013 bars), its 1,1,1-trifluoroethane content is approximately 70.6 mass % and that of propane 29.4 %.
This azeotrope can also be employed as an aerosol propellant or as a blowing agent for plastic foams.

REFERENCES:
patent: 2511993 (1950-06-01), Reed
patent: 4085073 (1978-04-01), Suh et al.
patent: 4198313 (1980-04-01), Bargigia
patent: 4482465 (1984-11-01), Gray
Research Disclosure vol. 162, Oct. 1977 disclosure # 16265 "Fluorocarbon Azeotropes" by E. I. du Pont de Nemours & Co., Inc. p. 70.

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