Abstract
Aqueous alkaline depolymerization of technical hydrolysis lignin (THL) was carried out with a 5% NaOH solution at a temperature of 180°C for 6 hours, the ratio between the biomass and depolymerizing agent being 1:8. The poplar wood sawdust was treated under the same conditions for 2 hours, where anthraquinone was added as a catalyst (0.5 wt %). The poplar wood bark was treated for 4 hours, without anthraquinone. Compounds contained in the aqueous phase were extracted three times by means of toluene for a ratio between the organic and aqueous phases equal to 1:5, 1:5 and 1:5. The compounds 2-methoxyphenol, 2,6-dimethoxyphenol, 4-hydroxy-3-methoxybenzaldehyde, 1-(4-hydroxy-3-methoxyphenyl)ethanone, 4-hydroxy-3,5-dimethoxybenzaldehyde, etc., were identified through GC-MS analysis in obtained extracts.
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Published in Khimiya Prirodnykh Soedinenii, No. 2, pp. 144–146, March–April, 2008.
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Nenkova, S., Vasileva, T. & Stanulov, K. Production of phenol compounds by alkaline treatment of technical hydrolysis lignin and wood biomass. Chem Nat Compd 44, 182–185 (2008). https://doi.org/10.1007/s10600-008-9009-z
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DOI: https://doi.org/10.1007/s10600-008-9009-z