Alkene and thioether oxidations with H2O2 over Ti-containing mesoporous mesophase catalysts

✍ Scribed by Oxana A Kholdeeva; Alexander Yu Derevyankin; Alexander N Shmakov; Nataliya N Trukhan; Eugenii A Paukshtis; Alain Tuel; Vyacheslav N Romannikov

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 180 KB
• Volume: 158
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(00)00116-3

✦ Synopsis

Ž

. Well-organized Ti-containing mesoporous mesophase materials Ti-MMM have been synthesized by hydrothermal Ž . synthesis using C H N CH Br and characterized by elemental analysis, IR, DRS-UV, XRD, and N adsorption. 16 33 3 3 2 Catalytic properties of these materials in alkene and thioether oxidations with aqueous H O in CH CN have been studied 2 2 3

Ž . and compared with those of the Ti-containing hexagonal mesoporous silica Ti-HMS . The Ti-MMM catalysts with the SirTi atomic ratio varying in the range of 49-124 showed the highest catalytic activities in alkene oxidation. Both the structure of a silicate matrix and a degree of isolation of titanium ions in it are crucial factors determining catalytic activity of Ti-MMM. For thioether oxidation, the structural perfection of Ti-MMM catalysts is less important. No leaching of titanium ions occurs during both reactions. The oxidation process proved to be truly heterogeneous.