Metathesis of methyloleate over methyltrioxorhenium supported on ZnCl₂-promoted mesoporous alumina

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• 作者：Subha Kumaraswamy Pillai^a ; ^b ; ^c ; Safia Hamoudi^a ; ^c ; Khaled Belkacemi^a ; ^c ; ^{khaled.belkacemi@sga.ulaval.ca}
• 关键词：Self-metathesis ; Methyloleate ; Methyltrioxorhenium (MTO) ; ZnCl2-promoted mesoporous alumina
• 刊名：Applied Catalysis A: General
• 出版年：2013
• 出版时间：30 March, 2013
• 年：2013
• 卷：455
• 期：Complete
• 页码：155-163
• 全文大小：1061 K

文摘

Methyltrioxorhenium impregnated on ZnCl₂-modified mesoporous alumina at Al/Zn ratio of 8-12 was revealed as an effective catalyst for self-metathesis of methyloleate at mild reaction conditions.

The use of other promoters either in form of metal chlorides or as other zinc halides did not promote the metathesis of methyloleate as zinc chloride. The enhancement of the activity was not only due to the chloride and/or zinc but could be attributed to the interaction of both elements as Zn-Cl or ZnCl₂ bonds with the mesoporous alumina.

The results of this research suggest that it is possible to design a heterogeneous catalyst for the efficient and selective self-metathesis of functionalized olefins such as methyloleate and edible oils, avoiding the utilization of expensive homogeneous catalysts or use of toxic promoters such as SnR₄ with heterogeneous catalysts.