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Fu, Shiyu; Lucia, Lucian A

TMAH-pyrolysis – gas chromatography – mass spectrometry analysis of residual lignin changes in softwood kraft pulp during oxygen delignification

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  • Medientyp: E-Artikel
  • Titel: TMAH-pyrolysis – gas chromatography – mass spectrometry analysis of residual lignin changes in softwood kraft pulp during oxygen delignification
  • Beteiligte: Fu, Shiyu; Lucia, Lucian A
  • Erschienen: Canadian Science Publishing, 2004
  • Erschienen in: Canadian Journal of Chemistry, 82 (2004) 7, Seite 1197-1202
  • Sprache: Englisch
  • DOI: 10.1139/v04-085
  • ISSN: 0008-4042; 1480-3291
  • Schlagwörter: Organic Chemistry ; General Chemistry ; Catalysis
  • Entstehung:
  • Anmerkungen:
  • Beschreibung: The residual lignins from pulps and effluent lignins from oxygen delignification effluents were characterized using pyrolysis – gas chromatography – mass spectrometry in the presence of tetramethylammonium hydroxide. The results indicated that oxidation under alkali oxygen conditions can induce fragmentation in lignin and produce more acid groups, but the lignin maintains most of its C6–C3 units. Oxygen delignification also led to a decrease in diphenyl structures in the residual lignin and an enrichment in concentration of lignin carbohydrate complex structures.Key words: residual lignin, pyrolysis, oxygen delignification.