Switchable solvents and methods of use thereof
US7982069B2 · kind B2 · utility
19Cited by
1References
46Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Mar 13, 2007 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Mar 13, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07B63/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A solvent that reversibly converts from a nonionic liquid mixture to an ionic liquid upon contact with a selected trigger, e.g., contact with CO2, is described. In preferred embodiments, the ionic solvent is readily converted back to the nonionic liquid mixture. The nonionic liquid mixture includes an amidine or guanidine or both, and water, alcohol, or a combination thereof. Single component amine solvents that reversibly convert between ionic and non-ionic states are also described. Some embodiments require increased pressure to convert; others convert at 1 atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.