Hildebrandt-Stärk K, Taccardi N, Bösmann A, Wasserscheid P (2010)
Publication Type: Journal article
Publication year: 2010
Publisher: Wiley-VCH Verlag
Book Volume: 3
Pages Range: 719--723
Volume: 3
Issue: 6
Journal Issue: 6
Beech lignin was oxidatively cleaved in ionic liquids to give phenols, unsaturated propylaromatics, and aromatic aldehydes. A multiparallel batch reactor system was used to screen different ionic liquids and metal catalysts. Mn(NO$_3$)$_2$ in 1-ethyl-3-methylimidazolium trifluoromethanesulfonate [EMIM][CF$_3$SO$_3$] proved to be the most effective reaction system. A larger scale batch reaction with this system in a 300mL autoclave (11g lignin starting material) resulted in a maximum conversion of 66.3 {\%} (24h at 100 °C, 84$\times$105Pa air). By adjusting the reaction conditions and catalyst loading, the selectivity of the process could be shifted from syringaldehyde as the predominant product to 2,6-dimethoxy-1,4-benzoquinone (DMBQ). Surprisingly, the latter could be isolated as a pure substance in 11.5 wt {\%} overall yield by a simple extraction/crystallization process.
APA:
Hildebrandt-Stärk, K., Taccardi, N., Bösmann, A., & Wasserscheid, P. (2010). Oxidative Depolymerization of Lignin in Ionic Liquids. Chemsuschem, 3(6), 719--723. https://doi.org/10.1002/cssc.200900242
MLA:
Hildebrandt-Stärk, Kerstin, et al. "Oxidative Depolymerization of Lignin in Ionic Liquids." Chemsuschem 3.6 (2010): 719--723.
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