Purification of 1,1,1,2-tetrafluoroethane
US5160499A · kind A · utility
5Cited by
3References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 11, 1992 |
| Grant date | Nov 3, 1992 |
| Priority date | — |
| Expiry date | Mar 11, 2012 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C17/389
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the removal of 1-chloro-2,2-difluoroethylene from 1,1,1,2-tetrafluoroethane which process comprises contacting 1,1,1,2-tetrafluoroethane containing 1-chloro-2,2-difluoroethylene with a zeolite containing strontium cations. The zeolite containing stronium cations may be produced by ion-exchange with a commercially available zeolite, for example an A-type zeolite or a chabazite.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.