Separating and removing 1, 1, 1-trifluoroethane by using azeotropic distillation
US5830325A · kind A · utility
13Cited by
10References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 1996 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Mar 28, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C19/08
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The disclosure relates to separating 1,1,1-trifluoroethane (HFC-143a from fluorocarbon impurities by using extractive distillation with an extractive agent comprising an alcohol. Examples of suitable extractive agents comprise at least one member from the group of methanol, butanol, ethanol, propanol, their isomers and cyclic compounds thereof, among others.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.