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Tunable microwave flow system for scalable synthesis of alkyl imidazolium-type ionic liquids

Michał Domański, Jonas Žurauskas, Joshua P. Barham*

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

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 languageEnglish
Pages (from-to)2498-2509
Number of pages12
JournalOrganic Process Research and Development
Volume26
Issue number8
Early online date11 Jul 2022
DOIs
Publication statusPublished - 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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