Issue 3, 2013

Hydrotalcite reconstructed by in situ rehydration as a highly active solid base catalyst and its application in aldol condensations

Abstract

Reconstructed hydrotalcite is a highly active heterogeneous base catalyst for a wide variety of reactions. Herein, we report a procedure to effectively prepare the reconstructed hydrotalcite. Mg–Al mixed oxide, which originates from hydrotalcite, is added directly to the aqueous-phase reaction system of the aldol condensation without the protection of an inert gas. Under the reaction conditions, the reconstructed hydrotalcite is in-situ generated, and is used as a catalyst for then aldol condensation as soon as it forms, resulting in the elimination of the deactivation of reconstructed hydrotalcite. The experimental results showed that the in-situ reconstructed hydrotalcite had higher catalytic activity and water tolerance. The work provides a simple and effective method for reconstructed hydrotalcite.

Graphical abstract: Hydrotalcite reconstructed by in situ rehydration as a highly active solid base catalyst and its application in aldol condensations

Supplementary files

Article information

Article type
Paper
Submitted
10 Aug 2012
Accepted
05 Nov 2012
First published
06 Nov 2012

RSC Adv., 2013,3, 793-801

Hydrotalcite reconstructed by in situ rehydration as a highly active solid base catalyst and its application in aldol condensations

C. Xu, Y. Gao, X. Liu, R. Xin and Z. Wang, RSC Adv., 2013, 3, 793 DOI: 10.1039/C2RA21762G

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