Oxidized Lignin Depolymerization using Formate Ionic Liquid as Catalyst and Solvent

Jinhuo Dai, Antonio F. Patti, Lionel Longe, Gil Garnier, Kei Saito

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)


Lignin has been widely studied as a sustainable source of renewable materials, particularly aromatic feedstock chemicals, which are in great and increasing need in the world. Lignin oxidation and depolymerization presents a promising approach to functionalized phenolic products. In this work, a novel oxidative degradation of lignin using a formate ionic liquid was investigated resulting in ethyl acetate soluble and also water-soluble depolymerized lignin products. The β-O-4 bonds in lignin were oxidized and then depolymerized by a recyclable ionic liquid, 2-hydroxy ethylammonium formate. 2-Hydroxy ethylammonium formate, which could dissolve lignin acting as a solvent, was found to also catalyze the depolymerization of the oxidized lignin. The lignin depolymerization products were characterized.

Original languageEnglish
Pages (from-to)2684-2690
Number of pages7
Issue number14
Publication statusPublished - 24 Jul 2017


  • Lignin oxidation
  • β-O-4 bonds
  • Formate ionic liquid
  • Lignin depolymerisation

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