Production of phenol compounds by alkaline treatment of poplar wood bark
It is well known that, as a result of thermo-chemical treatment in a water-alkaline medium, lignin is destroyed and low-molecular-weight phenol compounds are obtained [1, 2, 3, 4]. Low-molecular-weight phenol compounds (LMPC) 2-methoxyphenol, 2,6-dimethoxyphenol, vanillin, etc. were previously obtained from the alkaline destruction of technical hydrolysis lignin (THL), wood biomass, and poplar wood bark . The optimal conditions for obtaining LMPC were lignin– 5% NaOH ratio 1:10 and process duration 6 hours. The experiment has been carried out at 180°C .
Technical hydrolysis lignin is not as common a residue as wood bark. Moreover, treatment of the poplar wood bark leads to a considerably higher yield of low-molecular-weight compounds in comparison with those from THL treatment . This statement is due to the more condensed THL structure. The aim of the present investigation is to carry out alkaline treatment of poplar wood bark under different conditions.
The lignin content in...
KeywordsPhenol Compound Vanillin Polyethyleneglycol Alkaline Treatment Ethanone
- 6.T. Vasileva, S. Nenkova, and K. Stanulov, Cellul. Chem. Technol., 41, 379 (2007).Google Scholar