Epoxidation of cycloalkenones over amorphous titania-silica aerogels

被引：0

作者：

Hutter, R ^{[1
]}

Mallat, T ^{[1
]}

Baiker, A ^{[1
]}

机构：

[1] ETH Zentrum, Swiss Fed Inst Technol, Dept Chem Engn & Ind Chem, CH-8092 Zurich, Switzerland

来源：

HETEROGENEOUS CATALYSIS AND FINE CHEMICALS IV | 1997年 / 108卷

关键词：

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Epoxidation of alpha- and beta-isophorone was studied using t-butylhydroperoxide and a titania-silica catalyst containing 20 wt% titania. The mixed oxide was prepared by the sol-gel aerogel technique. Good activities and high selectivities (up to 94 - 99 %) could be achieved. The activity of the aerogel in the epoxidation of alpha-isophorone was compared to the performance of titania-silica xerogel, Mg-Al-hydrotalcite and KF/alumina catalysts. Acid-catalyzed side reactions during the epoxidation of beta-isophorone (isomerization to alpha-isophorone and epoxide ring opening) could be suppressed by treatment of the aerogel with a weak base. The influence of solvent, temperature and peroxide structure on the performance of the titania-silica aerogel is discussed.

引用

页码：329 / 336

页数：8

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