Control of the Chemoselectivity in the Oxidation of Geraniol Over Lanthanum, Titanium and Niobium Catalysts Supported on Mesoporous Silica MCM-41

被引：22
|
作者：
Marin-Astorga, N. [1 ]
Martinez, J. J. [2 ]
Borda, G. [2 ]
Cubillos, J. [2 ]
Suarez, D. N. [2 ]
Rojas, H. [2 ]
机构：
[1] Johnson Matthey Catalysts Inc Chem Catalysts & Re, Sevierville, TN 37862 USA
[2] Univ Pedag & Tecnol Colombia UPTC, Grp Catalisis, Escuela Ciencias Quim, Tunja, Boyaca, Colombia
来源：
TOPICS IN CATALYSIS | 2012年 / 55卷 / 7-10期
关键词：
Selective catalytic oxidation; Chemoselectivity; Allylic epoxide; Supported metals; MCM-41; Hydrogen peroxide; HYDROGEN-PEROXIDE; ALLYLIC ALCOHOLS; EPOXIDATION; OLEFINS;
D O I：
10.1007/s11244-012-9840-0
中图分类号：
O69 [应用化学];
学科分类号：
081704 ;
摘要：
The selective catalytic oxidation of geraniol with hydrogen peroxide over lanthanum, titanium and niobium catalysts supported on mesoporous silica MCM-41 has been investigated. Among the various catalysts studied, Nb-MCM-41 showed an excellent selectivity for allylic epoxide. In contrast, La-MCM-41 and Ti-MCM-41 catalysts exhibited high selectivity to citral. Catalyst's characterization and activity results clearly demonstrated that the differences in the product distribution were due to the presence of different acid sites and the better coordination of oxidant with the catalyst used. All the catalysts were characterized by nitrogen adsorption-desorption isotherms at 77 K, TPD-pyridine and XRD.
引用
收藏
页码：620 / 624
页数：5
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