Direct epoxidation process using pre-treated titanium zeolite

Details Direct epoxidation process using pre-treated titanium zeolite Direct epoxidation process using pre-treated titanium zeolite

C - Chemistry, Metallurgy

07

D

C07D 301/06 (2006.01) B01J 29/89 (2006.01)

Patent

CA 2462492

The invention is a process for epoxidizing an olefin with hydrogen and oxygen in the presence of a catalyst comprising a noble metal and pretreated titanium zeolite. Titanium zeolite pretreatment comprises contacting the titanium zeolite with a leaching agent prior to use in epoxidation. Surprisingly, the process using the pretreated titanium zeolite shows decreased ring-opening to unwanted glycols and glycol ethers.

L'invention concerne un procédé d'époxydation d'une oléfine à l'aide d'hydrogène et d'oxygène en présence d'un catalyseur contenant un métal noble et une zéolithe au titane prétraitée. Le prétraitement de la zéolithe au titane comporte l'étape consistant à mettre en contact la zéolithe au titane avec un agent de lixiviation avant de l'utiliser dans l'époxydation. Le procédé utilisant cette zéolithe au titane prétraitée implique de façon inattendue une ouverture réduite des cycles glycols et éthers glycoliques indésirables.

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