Azeotropic mixture with 1,1,1-trifluoroethane and propane a low boiling point and its applicatons as a refrigerant fluid, as an aerosol propellant, or as a blowing agent for plastic foams
US5080823A · kind A · utility
27Cited by
4References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1991 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Apr 2, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/05
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.