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Related Experiment Video

Updated: Jan 31, 2026

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Extraction of Lignin with High β-O-4 Content by Mild Ethanol Extraction and Its Effect on the Depolymerization Yield

Published on: January 7, 2019

Highly Selective Oxidation and Depolymerization of α,γ-Diol-Protected Lignin.

Wu Lan¹, Jean Behaghel de Bueren¹, Jeremy S Luterbacher¹

¹Laboratory of Sustainable and Catalytic Processing, Institute of Chemical Sciences and Engineering, École polytechnique fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland.

Angewandte Chemie (International Ed. in English)

|January 3, 2019

Summary

This study presents a novel method for lignin oxidation using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ) to produce valuable aromatic monomers. The new approach significantly enhances yield and selectivity, overcoming limitations of previous lignin degradation methods.

Keywords:

biomass conversion depolymerization homogeneous catalysis lignin oxidation

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Published on: July 26, 2018

Area of Science:

Sustainable chemistry
Biomass valorization
Organic synthesis

Background:

Lignin oxidation is a promising route to oxygenated aromatics.
Existing methods suffer from low selectivity and yield due to lignin degradation.

Purpose of the Study:

To develop selective oxidation and depolymerization methods for lignin.
To improve the yield and selectivity of aromatic monomer production from lignin.

Main Methods:

Developed stoichiometric and catalytic oxidation using 2,3-dichloro-5,6-dicyano-1,4-benzoquinone (DDQ).
Utilized a formic acid/sodium formate system for lignin depolymerization.
Protected lignin structure via acetal to prevent degradation.

Main Results:

Achieved 36% yield (stoichiometric) and 31% yield (catalytic) of aromatic monomers.
Reached 80% selectivity for syringyl propane dione.
Preservation of lignin structure by acetal contributed to high yields and selectivity.

Conclusions:

The developed DDQ-based oxidation and depolymerization strategy offers a sustainable pathway for lignin valorization.
This method significantly improves the production of aromatic monomers from lignin, addressing key limitations of prior techniques.