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Issue 6, 2012
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Highly-efficient conversion of glycerol to solketal over heterogeneous Lewis acid catalysts

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Abstract

The acetalization of acetone with glycerol to yield 2,2-dimethyl-1,3-dioxolane-4-methanol (solketal) was successfully catalyzed by mesoporous substituted silicates including the novel Hf-TUD-1 material. This reaction offers an attractive path for the conversion of glycerol, which is the main side-product in the synthesis of biodiesel, to a valuable compound with potential for industrial applications. The most promising among the heterogeneous catalysts employed in this work, Zr- and Hf-TUD-1 and Sn-MCM-41, display mainly Lewis acid properties as demonstrated by characterization with FT-IR analysis of pyridine adsorption, and achieve superior results compared to a reference solid acid catalyst such as Ultrastable zeolite Y. Especially the newly synthesized Hf-TUD-1, showing the highest conversion and turnover among the screened materials, is a promising catalyst for the acetalization of acetone with glycerol in a sustainable process. The excellent performance of these mesoporous catalysts is ascribed to their combination of acidity, wide pores, large specific surface area and relatively hydrophobic surface.

Graphical abstract: Highly-efficient conversion of glycerol to solketal over heterogeneous Lewis acid catalysts

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Publication details

The article was received on 16 Dec 2011, accepted on 19 Mar 2012 and first published on 11 Apr 2012


Article type: Paper
DOI: 10.1039/C2GC16619D
Citation: Green Chem., 2012,14, 1611-1619
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    Highly-efficient conversion of glycerol to solketal over heterogeneous Lewis acid catalysts

    L. Li, T. I. Korányi, B. F. Sels and P. P. Pescarmona, Green Chem., 2012, 14, 1611
    DOI: 10.1039/C2GC16619D

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