The activity of Mg/Al reconstructed hydrotalcites by memory effect in the cyanoethylation reaction

The aim of this work is to study how the changes of structure, texture and surface morphology of as-synthesized LDHs (Mg/Al = 3), the reconstructed via memory effect LDHs and their corresponding mixed oxides are reflected in the catalytic activity in cyanoethylation of ethanol with acrylonitrile. The as-synthesized LDHs was obtained by cor-precipitation at low suprasaturation conditions, the reconstructed LDHs by the rehydration of mixed oxides followed by drying in air or nitrogen flow. The samples have been characterized by XRD, FT-IR, TG-DTG, TEM and surface area measurements. (C) 2008 Elsevier B.V. All rights reserved.