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Catalysts 2017, 7(6), 184; doi:10.3390/catal7060184

Catalytic Acetalization: An Efficient Strategy for High-Value Utilization of Biodiesel-Derived Glycerol

Department of Biotechnology, Guangdong Polytechnic of Science and Trade, Guangzhou 510430, China
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Academic Editor: Chunbao (Charles) Xu
Received: 27 March 2017 / Revised: 24 May 2017 / Accepted: 26 May 2017 / Published: 8 June 2017
(This article belongs to the Special Issue Glycerol Conversion by Heterogeneous Catalysis)
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Abstract

In this study, an efficient process for high value utilization of biodiesel-derived glycerol was proposed via a simple reaction of acetalization catalyzed by novel catalysts of ester sulfate-functionalized ionic liquids (ILs). The relationship between the IL structure and its catalytic activity was investigated. The effects of reaction conditions, and the substrate adaptability, were also carefully studied. The results demonstrate that ester sulfate-functionalized IL shows excellent catalytic activity on the acetalization of glycerol with aldehyde (ketone). Under the optimized condition, 87% glycerol conversion was obtained with 99% acetal selectivity when glycerol was condensed with cyclohexanone. In particular, 29% of product consists of six-membered compound, an important fine chemical and an excellent precursor in organic chemistry, because of the significant steric-hindrance effect of IL catalyst. Furthermore, the IL catalyst shows good recyclability where insignificant activity loss was exhibited even after six runs. View Full-Text
Keywords: glycerol; acetalization; ionic liquid; catalytic activity; recyclability glycerol; acetalization; ionic liquid; catalytic activity; recyclability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Sun, S.; He, M.; Dai, Y.; Li, X.; Liu, Z.; Yao, L. Catalytic Acetalization: An Efficient Strategy for High-Value Utilization of Biodiesel-Derived Glycerol. Catalysts 2017, 7, 184.

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