Separation of cellulose/hemicellulose from lignin in white pine sawdust using boron trihalide reagents

A mild method for the separation of cellulose/hemicellulose from extractives free sawdust is described. Sequential treatments with an equimolar mixture of BCl3 and BBr3 remove polysaccharide components from a white pine sawdust sample. Spectroscopic analyses, including solution and solid-state NMR s...

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Bibliographic Details
Published in:Tetrahedron 2019-03, Vol.75 (11), p.1465-1470
Main Authors: Kazmi, M. Zain H., Karmakar, Abhoy, Michaelis, Vladimir K., Williams, Florence J.
Format: Article
Language:English
Subjects:
Boron chemistry
Boron-mediated depolymerization
Cellulose separation
Lignin separation
Lignocellulose fractionation
Lignocellulose valorization
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Summary:A mild method for the separation of cellulose/hemicellulose from extractives free sawdust is described. Sequential treatments with an equimolar mixture of BCl3 and BBr3 remove polysaccharide components from a white pine sawdust sample. Spectroscopic analyses, including solution and solid-state NMR spectroscopy, confirm a reduction in the amount of aliphatic sugars in solid samples and show that extracted components consist only of polymeric sugars and are free of aromatics. Staining with fluorescent and colorimetric dyes confirm that the sawdust sample after boron trihalide treatment is primarily lignin, with no detectable polysaccharides. [Display omitted]
ISSN:0040-4020
1464-5416
DOI:10.1016/j.tet.2019.02.009