Method for producing trifluoromethanesulfonic anhydride
US7741518B2 · kind B2 · utility
1Cited by
2References
4Claims
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Key dates
| Filing date | Oct 24, 2006 |
| Grant date | Jun 22, 2010 |
| Priority date | — |
| Expiry date | Oct 24, 2026 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
This method for producing trifluoromethanesulfonic anhydride reacting trifluoromethanesulfonic acid with phosphorus pentoxide to produce trifluoromethanesulfonic anhydride, wherein hardening of the reaction solution due to polyphosphoric acid, which is produced as a byproduct, is prevented by using an excess amount of trifluoromethanesulfonic acid with respect to the phosphorus pentoxide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.