Cleaving the β-O-4 Bonds of Lignin Model Compounds in an Acidic Ionic Liquid, 1-H-3-Methylimidazolium Chloride: An Optional Strategy for the Degradation of Lignin

被引:153
作者
Jia, Songyan [1 ,2 ]
Cox, Blair J. [1 ]
Guo, Xinwen [2 ]
Zhang, Z. Conrad [3 ]
Ekerdt, John G. [1 ]
机构
[1] Univ Texas Austin, Dept Chem Engn, Austin, TX 78712 USA
[2] Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116012, Liaoning, Peoples R China
[3] KiOR Inc, Pasadena, TX 77507 USA
基金
美国国家科学基金会;
关键词
biomass; ethers; hydrolysis; ionic liquids; renewable resources; CATALYZED HYDROLYSIS; CONVERSION; CELLULOSE; SOLVENT; FUTURE; ETHER; WOOD; DEHYDRATION; CHEMISTRY; MECHANISM;
D O I
10.1002/cssc.201000112
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The hydrolysis of beta-O-4 bonds in two lignin model compounds was studied in an acidic ionic liquid, 1-H-3-methylimidazolium chloride. The beta-O-4 bonds of both guaiacylglycerol-beta-guaiacyl ether and veratrylglycerol-beta-guaiacyl ether underwent catalytic hydrolysis to produce guaiacol as the primary product with more than 70% yield at 150 degrees C. Up to 32 wt% substrate concentration could be treated in the system without a decrease in guaiacol production. The ionic liquid could be reused without loss of activity in guaiacol production from both guaiacylglycerol-beta-guaiacyl ether and veratrylglycerol-beta-guaiacyl ether. A possible mechanism accounting for the guaiacol production is presented.
引用
收藏
页码:1078 / 1084
页数:7
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