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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职:盘锦校区管委会副主任兼教学与科研工作部部长
性别:男
毕业院校:大连理工大学
学位:博士
所在单位:化工学院
学科:工业催化. 物理化学
办公地点:化工实验楼B427
联系方式:18641143913
电子邮箱:guoxw@dlut.edu.cn
Hydrolytic Cleavage of beta-O-4 Ether Bonds of Lignin Model Compounds in an Ionic Liquid with Metal Chlorides
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论文类型:期刊论文
发表时间:2011-01-19
发表刊物:International Symposium on New Frontiers in Chemical and Biochemical Engineering
收录刊物:SCIE、EI、CPCI-S、Scopus
卷号:50
期号:2
页面范围:849-855
ISSN号:0888-5885
摘要:The hydrolytic cleavage of beta-O-4 ether bonds in lignin model compounds, guaiacylglycerol-beta-guaiacyl ether (GO) and veratrylglycerol-beta-guaiacyl ether (VG), was studied in 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) with metal chlorides and water. FeCl3, CuCl2, and AlCl3 were found to be effective and functioned catalytically in cleaving the beta-O-4 bond of GO, although a number of other metal chlorides are considerably less active. AlCl3 functioned more effectively in cleaving the beta-O-4 bond of VG than did FeCl3 and CuCl2. After 120 min at 150 degrees C, GO conversion reached 100%, and about 70% of the beta-O-4 bonds of GO were hydrolyzed, liberating guaiacol, in the presence of FeCl3 and CuCl2, while about 80% of the beta-O-4 bonds of GO were hydrolyzed in the presence of AlCl3 with 100% GO conversion. About 75% of the beta-O-4 bonds of VG were hydrolyzed in the presence of AlCl3 after 240 min at 150 degrees C. The catalytic activity is associated with the hydrochloric acid, working as the acid catalyst, formed in situ by the hydrolysis of the metal chlorides. A dehydration product and dimer products from GO were detected and proposed as the possible intermediate products in the GO reaction. One possible acid-catalyzed pathway accounting for the guaiacol production from GO is presented.