Journal
GREEN CHEMISTRY
Volume 11, Issue 3, Pages 339-345Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/b815310h
Keywords
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Funding
- The Australian Sugar Research and Development Corporation
- Centre for Green Chemistry at Monash University
- Australian Research Council
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Lignocellulosic materials are a potentially valuable source of both aromatic compounds via the lignin component and sugars from the cellulose and hemicellulose components. However, efficient means of separating and depolymerising the components are required. An ionic liquid mixture containing the 1-ethyl-3-methylimidazolium cation and a mixture of alkylbenzenesulfonates with xylenesulfonate as the main anion was used to extract lignin from sugarcane plant waste at atmospheric pressure and elevated temperatures (170-190 degrees C). The lignin was recovered from the ionic liquid by precipitation, allowing the ionic liquid to be recycled. An extraction yield exceeding 93% was attained. The lignin produced had a molecular weight of 2220 g/mol after acetylation. The regenerated ionic liquid showed good retention of structure and properties. The other product of the extraction was a cellulose pulp, which can be used in further processing.
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