Chemsuschem Chemistry And Sustainability, Energy & Materials 2010-06-21

Oxidative depolymerization of lignin in ionic liquids.

Kerstin Stärk, Nicola Taccardi, Andreas Bösmann, Peter Wasserscheid

文献索引：ChemSusChem 3(6) , 719-23, (2010)

全文：HTML全文

摘要

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 300 mL autoclave (11 g lignin starting material) resulted in a maximum conversion of 66.3 % (24 h at 100 degrees C, 84x10(5) Pa 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.

相关化合物

  • 3,5-二甲氧基-4-羟...
  • 2,6-二甲氧基-1,4-...

相关文献：

Effect of electron donating groups on polyphenol-based antioxidant dendrimers.

2015-04-01

[Biochimie 111 , 125-34, (2015)]

Steam explosion distinctively enhances biomass enzymatic saccharification of cotton stalks by largely reducing cellulose polymerization degree in G. barbadense and G. hirsutum.

2015-04-01

[Bioresour. Technol. 181 , 224-30, (2015)]

Cellular apoptosis and cytotoxicity of phenolic compounds: a quantitative structure-activity relationship study.

2005-11-17

[J. Med. Chem. 48 , 7234-42, (2005)]

Laccase-like enzyme activities from chlorophycean green algae with potential for bioconversion of phenolic pollutants.

2015-06-01

[FEMS Microbiol. Lett. 362 , (2015)]

Inhibition of cellulose enzymatic hydrolysis by laccase-derived compounds from phenols.

2015-01-01

[Biotechnol. Prog. 31 , 700-6, (2015)]

更多文献...