Hydrotalcite reconstructed by in situ rehydration as a highly active solid base catalyst and its application in aldol condensations
Authors:
- 6 November 2012
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in RSC Advances
- Vol. 3 (3) , 793-801
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.Keywords
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