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- W4383910299 abstract "Milled wood lignin (MWL) from yellow poplar was sulfuric acid/ethanol treated at various conditions (temperature (120-200 ˚C) and catalyst concentration (0.5, 1, and 2%)). In the degradation stage (0.5% H₂SO₄ at 120-180 ˚C, 1% and 2% H₂SO₄ at 120-140 ˚C), a large amount of lignin (56.4%~63.2%) was isolated, and mainly composed of syringyl unit lignin with degraded hemicellulose. In the re-distribution stage (1% H2SO4 at 140-200 ˚C, 2% H₂SO₄ at 140-180 ˚C), water-insoluble solid (WIS) recovery rate, Mw, and ethanol organosolv lignin (EOL) yield were maintained; however, syringyl to vanillyl ratio of nitrobenzene oxidation (NBO) products was re-rose. These imply that more syringyl units are released in degradation stage by cleavage of lignin-hemicellulose linkage, but beyond that point, isolation of guaiacyl unit by cleavage of aryl ether linkage and condensation of released syringyl unit lignin to solid fraction were occurred." @default.
- W4383910299 created "2023-07-12" @default.
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- W4383910299 date "2023-06-30" @default.
- W4383910299 modified "2023-10-16" @default.
- W4383910299 title "Effect of sulfuric acid/ethanol treatment on yellow poplar milled wood lignin" @default.
- W4383910299 doi "https://doi.org/10.37581/kfb.2023.31.1.13" @default.
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