Methods for purifying refrigerant compositions
US5497627A · kind A · utility
17Cited by
6References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1994 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Dec 21, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF25B45/00
- WIPO fieldThermal processes and apparatus
- WIPO sectorMechanical engineering
Abstract
Improved methods for purification and recovery of individual refrigerants from refrigerant mixtures without chemical destruction of the contaminating refrigerant. Aqueous solutions are employed in extraction methods by relying on differences in water solubilities and partition coefficients at ambient temperatures. All refrigerants can be recovered and the aqueous solutions reused to form a cyclic process. Methods include countercurrent extraction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.