Structural characterization of an Organosolv lignin by analytical pyrolysis and wet chemical degradation methods

摘要: Abstract New sulphur-free lignins of an Organosolv pulping and a spruce milled wood lignin as reference sample were structurally characterized using pyrolysis-gas chromatography/mass spectrometry. The principal component analysis the pyrolysis results clearly indicates that, in comparison with lignin, structure is strongly changed. Furthermore, parameters, temperature, time, methanol content, process design, well pH value precipitation from spent liquor, influence structural features differently. When including statistical interpretations essential wet chemical methods, relationships between lignin-typical bonds, diphenylmethane units, phenolic aliphatic hydroxyl groups pattern can be identified. A regression equation discussed, which makes it possible to determine structures on basis obtained pyrolysis.