Ti-MCM-41 catalysts prepared by post-synthesis methods: Limonene epoxidation with H₂O₂

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• 作者：Dami&#xe1 ; n Marino ; Norma G. Gallegos ; Jos&#xe9 ; F. Bengoa ; Ana M. Alvarez ; Mar&#xed ; a V. Cagnoli ; S ; ra G. Casuscelli ; Eduardo R. Herrero ; Sergio G. Marchetti
• 关键词：Ti-MCM-41 ; Limonene epoxidation ; Post-synthesis methods
• 刊名：Catalysis Today
• 出版年：2008
• 期刊代码：13_09205861
• 类别：ce
• 出版时间：April-June 2008
• 卷：133-135
• 期：Complete
• 页码：632-638
• 文件大小：544 K

摘要

Ti-MCM-41 catalysts were prepared incorporating Ti by post-synthesis methods: wetness and wet impregnation of MCM-41 mesoporous solid. The samples were characterized by XRD at low angle, UV–vis DRS, Raman spectroscopy, BET, ICP and colorimetry. The results were compared with those obtained for Ti-MCM-41 hydrotermically prepared. All catalysts were tested in the limonene epoxidation with H₂O₂. Three kinds of Ti sites were observed in post-synthesis catalysts which were different from that found in the hydrothermal Ti-MCM-41. These structural differences do not produce important changes in the catalytic activity, instead a slight decrease in the epoxide selectivity can be observed. The catalysts prepared by post-synthesis methods are promising in the limonene epoxidation with H₂O₂ since these methods are simple and reproducible.