Recently reported acetosolv soft- and hardwood lignins as well as ionosolv soft- and hardwood lignins were transformed into monomeric aromatic compounds using either a vanadate or a molybdate-based catalyst system. Monomers were generated with remarkable, catalyst-dependent selectivity and high depolymerisation yields via oxidative exo- and endo-depolymerisation processes. Using the vanadate-hydrogen peroxide system on acetosolv pine lignin, vanillin and isovanillin were produced as main products with depolymerisation yields of 31%. Using the molybdate system on acetosolv and ionosolv lignin, vanillic acid was the practically exclusive product, with depolymerisation yields of up to 72%. Similar selectivities, albeit with lower depolymerisation yields of around 50% under standardised conditions, were obtained for eucalyptus acetosolv lignin, producing vanillin and syringaldehyde or vanillic acid as products, by using the vanadate- or the molybdate-based systems respectively.

Penin, L., Gigli, M., Sabuzi, F., Santos, V., Galloni, P., Conte, V., et al. (2020). Biomimetic vanadate and molybdate systems for oxidative upgrading of iono- and organosolv hard- and softwood lignins. PROCESSES, 8(9), 1161 [10.3390/PR8091161].

Biomimetic vanadate and molybdate systems for oxidative upgrading of iono- and organosolv hard- and softwood lignins

Sabuzi F.
;
Galloni P.;Conte V.;Crestini C.
2020

Abstract

Recently reported acetosolv soft- and hardwood lignins as well as ionosolv soft- and hardwood lignins were transformed into monomeric aromatic compounds using either a vanadate or a molybdate-based catalyst system. Monomers were generated with remarkable, catalyst-dependent selectivity and high depolymerisation yields via oxidative exo- and endo-depolymerisation processes. Using the vanadate-hydrogen peroxide system on acetosolv pine lignin, vanillin and isovanillin were produced as main products with depolymerisation yields of 31%. Using the molybdate system on acetosolv and ionosolv lignin, vanillic acid was the practically exclusive product, with depolymerisation yields of up to 72%. Similar selectivities, albeit with lower depolymerisation yields of around 50% under standardised conditions, were obtained for eucalyptus acetosolv lignin, producing vanillin and syringaldehyde or vanillic acid as products, by using the vanadate- or the molybdate-based systems respectively.
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore CHIM/06
English
Biomimetic; Catalytic lignin oxidation; Ionosolv; Lignin; Molybdate; Organosolv; Oxidative lignin upgrade; Vanadate
Penin, L., Gigli, M., Sabuzi, F., Santos, V., Galloni, P., Conte, V., et al. (2020). Biomimetic vanadate and molybdate systems for oxidative upgrading of iono- and organosolv hard- and softwood lignins. PROCESSES, 8(9), 1161 [10.3390/PR8091161].
Penin, L; Gigli, M; Sabuzi, F; Santos, V; Galloni, P; Conte, V; Parajo, Jc; Lange, H; Crestini, C
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/273771
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