Selective separation of homogeneous catalysts using silicalite membranes

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• 作者：G??llego ; Inmaculada ; Mallada ; Reyes ; Urriolabeitia ; Esteban P. ; Navarro ; Rafael ; Men??ndez ; Miguel ; et. al.
• 关键词：Diels-Alder reaction ; Palladium ; Zeolites ; Membranes ; Catalyst recovery
• 刊名：Inorganica Chimica Acta
• 出版年：2004
• 出版时间：December 1, 2004
• 年：2004
• 卷：357
• 期：15
• 页码：4577-4581
• 全文大小：264 K

文摘

The recovery of a homogeneous catalysts can be performed effectively by means of a zeolite membrane, which in many cases has a crystalline structure with pores smaller than transition metal catalysts but larger than the products. This concept has been successfully applied to the Diels-Alder reaction between acroleine and cyclopentadiene, catalyzed by a cationic dinuclear Pd(II) complex. A reaction mixture containing 5-norbornene-2-carboxyaldehyde and the catalyst employed for its synthesis [Pd(??-Cl)(Ph₂P-(CH₂)₄-PPh₂)](CF₃SO₃)₂ shows close to 100 % recovery of the metallic compound.