Azeotropic mixtures of dimethyl ether and of 1,1,1,2-tetrafluoro

Details Azeotropic mixtures of dimethyl ether and of 1,1,1,2-tetrafluoro Azeotropic mixtures of dimethyl ether and of 1,1,1,2-tetrafluoro

1991-02-20

1993-02-23

Skane, Christine

Compositions

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

252162, 252170, 252171, 252172, 252305, 252364, 252DIG9, 62114, 264 53, 264DIG5, 521 88, 521 98, 521131, C09K 504, C09K 330

Patent

active

051887487

ABSTRACT:
This invention proposes to employ a mixture of dimethyl ether and of 1,1,1,2-tetrafluoroethane as refrigerant fluids to replace chlorofluorocarbons.
These compounds form an azeotrope which, at its normal boiling point (approximately -22.4.degree. C. at 1.013 bar), contains approximately 62.3 mass % of 1,1,1,2-tetrafluoroethane.
The mixture according to the invention can also be employed as aerosol propellant or as blowing agent for plastic foams.

REFERENCES:
patent: 2885427 (1959-05-01), Ruh et al.
patent: 3607755 (1971-09-01), Murphy et al.
patent: 4129603 (1978-12-01), Bell
patent: 4226976 (1980-10-01), Goodman et al.
patent: 4428854 (1984-01-01), Enjo et al.
patent: 4755316 (1988-07-01), Magid et al.
patent: 4771080 (1988-09-01), Ibuki et al.
patent: 4783276 (1988-11-01), Bohnenn
patent: 4810316 (1989-03-01), Wakabayashi et al.
Chem. Abstr., vol. 87, 1977, Abstract No. 200710q.
"Technical Progress on Protecting the Ozone Layer, Refrigeration, Air Conditioning and Heat Pumpts", Technical Options Report, May 1989, pp. 34-36.

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