SO3H-Functionalized Ionic Liquid Catalyzed Alkylation of Catechol with tert-Butyl Alcohol
发布时间：2019-03-09
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：
- Scopus、EI、SCIE
- 文献类型：
- J
- 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.
- 第一作者
- Nie, Xiaowa
- 合写作者
- Liu, Min,Song, Chunshan,Guo, Xinwen,Liu, Xin,Gao, Lei
- 通讯作者
- Song, CS (reprint author), Dalian Univ Technol, Sch Chem Engn, State Key Lab Fine Chem, Dalian 116012, Peoples R China.