查找使用阿拉丁产品的科研文献

Deep eutectic solvents promote in-situ hydrogenolysis of Evodia lepta residue in preparing small aromatic phenol ketones

Shutian Chen,Yating Jian,Yaowei Liu,Zhanying Zhang,Xinlong Li,Qiang Yu

A deep eutectic solvent (DES) system of ChCl-MeOH-AlCl 3 ·6H 2 O was developed for simultaneous dissolution of lignin from Evodia lepta residue and in-situ hydrogenolysis of lignin to aromatic phenol ketones using a Ru-C catalyst. The use of this DES led to a delignification of reached 93.1 % and cellulose and hemicellulose retentions of 95.3 % and 47.8 % respectively at the molar ratio of 1:12:0.2. While the total aromatic phenol ketones yield reached 92.4 % under 130 °C for 3 h with 17.2 % yields of vanillyl methyl ketone, 9.1 % syringylacetone, 25.4 % dihydroeugenol, and 40.7 % 4-propyl-2,6-dimethoxyphenol. The improved Ru-C properties in the DES system like thermal stability, the specific surface area and reduction potential contributed on the exceptional high product yields. The aromatic phenol ketones were 312.5 % higher than the reported yields of hydrogenolysis of aromatic monomers by ethanol/1,4-dioxane/formic acid under 300 °C–2 h conditions.