Journal
CHEMSUSCHEM
Volume 12, Issue 2, Pages 542-548Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201801971
Keywords
biomass; green chemistry; lignin; oxidation; sustainable chemistry
Funding
- CRITICAT Centre for Doctoral Training [EP/L016419/1]
- BBSRC Global Challenges Research Fund Impact Acceleration Account at St Andrews [BB/GCRFIAA/20]
- Leverhulme Trust
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Chemically modified lignins are important for the generation of biomass-derived materials and as precursors to renewable aromatic monomers. A butanol-based organosolv pretreatment has been used to convert an abundant agricultural waste product, rice husks, into a cellulose pulp and three additional product streams. One of these streams, a butanol-modified lignin, was oxidized at the position to give a carboxylic acid functionalized material. Subsequent coupling of the acid with aniline aided lignin characterization and served as an example of the flexibility of this approach for grafting side chains onto a lignin core structure. The pretreatment was scaled up for use on a multi-kilogram scale, a development that enabled the isolation of an anomeric mixture of butoxylated xylose in high purity. The robust and scalable butanosolv pretreatment has been developed further and demonstrates considerable potential for the processing of rice husks.
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