Abstract
A continuous flow auto-frequency tuning single-mode microwave reactor is disclosed as a powerful platform to synthesize alkyl imidazolium salts as ionic liquids/ionic liquid precursors in up to near-quantitative yields, 100-600 g h-1productivities and record space-time yields. Challenges faced, including viscosity changes, dielectric property changes, and phase separations, were addressed by different operation modes of the reactor without reactor redesigning. Depending on the purpose, this highly productive method could prove to be useful for intensive applications of ionic liquids.
| Original language | English |
|---|---|
| Pages (from-to) | 2498-2509 |
| Number of pages | 12 |
| Journal | Organic Process Research and Development |
| Volume | 26 |
| Issue number | 8 |
| Early online date | 11 Jul 2022 |
| DOIs | |
| Publication status | Published - 19 Aug 2022 |
Funding
Financial support is gratefully acknowledged from (i)Alexander von Humboldt Foundation, provided within the framework of the Sofja Kovelevskaja Award endowed by theGerman Federal Ministry of Education and Research to J.P.B., and (ii) the Fakultä t für Chemie und Pharmazie at the Universitä t Regensburg for providing a Ph.D. position to M.D., and a temporary research contract to J.Ž . is gratefully acknowledged
Keywords
- auto-frequency tuning
- flow chemistry
- imidazolium salts
- impedance matching
- ionic liquids
- microwave chemistry
- microwave flow reactor
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