Abstract
This study reports the preparation of hydrotalcite with Mg/Al molar ratio 3 by co-precipitation under low suprasaturation conditions of Mg and Al nitrated solutions with Na2CO3 and NaOH at pH 10. The solid was thermally decomposed at 460 °C in air atmosphere in order to obtain mixed oxides which, by means of memory effect, can reconstruct the hydrotalcite structure by hydration with bi-distilled water. The hydrotalcite and reconstructed samples by memory effect were characterized by elemental analysis, powder XRD, DRIFT and TG-DTG. Determination of the catalysts surface base sites was made using a method based on the irreversible adsorption of organic acids with different pK a values and N2 adsorption–desorption isotherms. The catalytic activity of these solids was evaluated in 1,4-addition of saturated linear alcohols to different acrylic compounds. All these reactions arose with high selectivity in the desired product. No by-products were detected by means of GC–MS chromatography and 1H NMR.
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Acknowledgments
FT acknowledge support from the strategic grant POSDRU/89/1.5/S/58852, Project “Postdoctoral program for training scientific researchers” co-financed by the European Social Found within the Sectorial Operational Program Human Resources Development 2007–2013. The research was also supported by a Grant of the Romanian National Authority for Scientific Research, CNCS - UEFISCDI, project number PN-II-RU-TE-2011-3-0026.
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Teodorescu, F., Deaconu, M., Bartha, E. et al. Addition of Alcohols to Acrylic Compounds Catalyzed by Mg–Al LDH. Catal Lett 144, 117–122 (2014). https://doi.org/10.1007/s10562-013-1108-1
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DOI: https://doi.org/10.1007/s10562-013-1108-1