6533b82ffe1ef96bd1296498

RESEARCH PRODUCT

Comprehensive valorisation of technically relevant organosolv lignins via anodic oxidation

Siegfried R. WaldvogelMichael ZirbesManuel Breiner

subject

chemistry.chemical_compoundchemistryVanillinYield (chemistry)OrganosolvEnvironmental ChemistryOrganic chemistryLigninGuaiacolValorisationRaw materialPollutionSyringaldehyde

description

Lignin represents the largest renewable feedstock of aromatic moieties in nature. However, its valorisation towards organic chemicals poses a challenging task. We herein report the selective electrochemical depolymerisation of several technically relevant organosolv lignins to aromatic fine chemicals with a simple two-electrode arrangement using caustic soda as electrolyte. Vanillin, syringaldehyde, the corresponding ketones and guaiacol were obtained with a combined maximum of 7.8 wt% isolated yield. Deeper insight in the process was provided by FT-IR, HSQC NMR and 31P NMR analyses of the lignins.

https://doi.org/10.1039/d1gc01995c