Allylic oxidation of cyclohexene over ruthenium-doped titanium-pillared clay

被引：43
作者：
Dali, Ahmed [1 ]
Rekkab-Hammoumraoui, Ilhem [1 ]
Choukchou-Braham, Abderrahim [1 ]
Bachir, Redouane [1 ]
机构：
[1] Univ Tlemcen, Fac Sci, Lab Catalyse & Synthese Chim Organ, Tilimsen, Algeria
来源：
RSC ADVANCES | 2015年 / 5卷 / 37期
关键词：
SELECTIVE CATALYTIC-REDUCTION; HIGHLY-ACTIVE CATALYSTS; LIQUID-PHASE OXIDATION; MONTMORILLONITE CLAY; AEROBIC OXIDATION; EPOXIDATION; COMPLEXES; VANADIA; ACID; REACTIVITY;
D O I：
10.1039/c4ra17129b
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Ruthenium-doped H-Montmorillonite (H-Mont) and Ti-pillared clay (Ti-PILC) were prepared then studied for oxidation of cyclohexene, with tert-butylhydroperoxide (TBHP) as the oxygen source. The Ti-PILC support was prepared by hydrolysis of Ti(OC3H7)(4) with HCl. The synthesized Ru/Ti-PILC and Ru/H-Mont catalysts were characterized by chemical analysis, surface area/pore volume measurements, Fourier transform infrared (FTIR) spectroscopy, X-ray powder diffraction (XRD), and UV-vis-diffuse reflectance spectroscopy (UV-vis-DRS). Both catalysts can selectively oxidize cyclohexene through allylic oxidation to give 2-cyclohexene-1-one as the major product, and 2-cyclohexene-1-ol as the minor product. The influence of reaction time, temperature, catalyst amount, and substrate/oxidant ratio was also investigated to find the optimal reaction for cyclohexene oxidation to get the highest conversion. Indeed, when 5% Ru/Ti-PILC was employed as catalyst, 59% cyclohexene conversion, 87% selectivity for 2-cyclohexene-1-one and 13% selectivity for 2-cyclohexene-1-ol were obtained under ambient pressure, at 70 degrees C, for a 6 h reaction time. The catalysts were reused in four consecutive runs.
引用
收藏
页码：29167 / 29178
页数：12
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