Acetyl Groups in Typha capensis: Fate of Acetates during Organosolv and Ionosolv Pulping.
Polymers (Basel)
; 10(6)2018 Jun 05.
Article
en En
| MEDLINE
| ID: mdl-30966652
ABSTRACT
During biomass fractionation, any native acetylation of lignin and heteropolysaccharide may affect the process and the resulting lignin structure. In this study, Typha capensis (TC) and its lignin isolated by milling (MWL), ionosolv (ILL) and organosolv (EOL) methods were investigated for acetyl group content using FT-Raman, ¹H NMR, 2D-NMR, back-titration, and Zemplén transesterification analytical methods. The study revealed that TC is a highly acetylated grass; extractive free TC (TCextr) and TC MWL exhibited similar values of acetyl content 6 wt % and 8 wt % by Zemplén transesterification, respectively, and 11 wt % by back-titration. In contrast, lignin extracted from organosolv and [EMIm][OAc] pulping lost 80% of the original acetyl groups. With a high acetyl content in the natural state, TC could be an interesting raw material in biorefinery in which acetic acid could become an important by-product.
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1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Polymers (Basel)
Año:
2018
Tipo del documento:
Article
País de afiliación:
Alemania