(86c) Unlocking Biomass Recalcitrance Using Lignin Based Ionic Liquids
- Conference: AIChE Annual Meeting
- Year: 2017
- Proceeding: 2017 Annual Meeting
- Group: Topical Conference: Innovations of Green Process Engineering for Sustainable Energy and Environment
- Time: Monday, October 30, 2017 - 8:34am-8:51am
Protic ILs prepared from benzaldehydes and furfural have demonstrated efficacy as pretreatment solvents, yielding over 85% fermentable sugars from switchgrass. We herein present the first synthesis and evaluation of quaternary benzylammonium ILs from vanillin and syringaldehyde, two major products of oxidative lignin depolymerization. Reductive amination with dialkylamines (C1-C6) followed by methylation with dimethyl carbonate was used to prepare a series of ILs, which were characterized and evaluated for their ability to pretreat switchgrass. Under mild and dilute conditions, certain ILs gave excellent pretreatment yields of fermentable sugars.