刘民

个人信息Personal Information

副教授

博士生导师

硕士生导师

主要任职:Associate Professor

其他任职:系教工党支部书记

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. 能源化工

办公地点:大连理工大学西校区化工实验楼B421

电子邮箱:lium@dlut.edu.cn

扫描关注

论文成果

当前位置: 刘民 >> 科学研究 >> 论文成果

SO3H-Functionalized Ionic Liquid Catalyzed Alkylation of Catechol with tert-Butyl Alcohol

点击次数:

论文类型:期刊论文

发表时间:2010-09-01

发表刊物:INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录刊物:SCIE、EI、Scopus

卷号:49

期号:17

页面范围:8157-8163

ISSN号:0888-5885

摘要:Several SO3H-functionalized ionic liquids (Fits) were synthesized and their catalytic performances for catechol (CAT) alkylation with tert-butyl alcohol (TBA) were studied theoretically as well as experimentally. Under optimized reaction conditions, the conversion of CAT was 41.5%, and the selectivity for 4-tert-butyl catechol (4-TBC) could reach 97.1%. This electrophilic reaction exhibits a kinetics-dependent character. The higher frontier electron density at the C-4 site, comparatively lower activation energy barrier (E-a), and higher thermodynamic stability all act in concert to make the reaction proceed preferentially toward 4-TBC. The FILs can lead to a much higher CAT conversion and a similar selectivity to 4-TBC compared to a Beta zeolite catalyst. Because the frontier electron density [f(r)(E)] of CAT was not significantly affected by the solvent, the product selectivity rule would not vary, whereas the addition of a solvent with a higher dielectric constant would slow the reaction by increasing E-a, thus resulting in a lower CAT conversion.