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Effect of rehydration conditions on the catalytic activity of hydrotalcite-derived Mg-Al oxides in aldolization of acetone |
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| Authors: | Piotr Ku trowski Dominika Su&#x;kowska Lucjan Chmielarz Piotr Olszewski Alicja Rafalska-&#x;asocha and Roman Dziembaj |
| Institution: | (1) Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland;(2) Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland;(3) Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland;(4) Institute of Catalysis and Surface Chemistry, Polish Academy of Science, Niezapominajek 8, 30-239 Kraków, Poland;(5) Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland;(6) Faculty of Chemistry, Jagiellonian University, Ingardena 3, 30-060 Kraków, Poland |
| Abstract: | Summary Mg-Al hydrotalcite-derived oxides with a varying Mg/Al molar ratio, ranging from 2.6 to 3.2, were rehydrated in the vapor phase at different temperatures (20-90°C). The catalytic performance of the materials obtained was studied in the aldol condensation of acetone. The initial activity of the rehydrated catalysts depended strongly on the Mg/Al molar ratio and the activation temperature. It was found that the re-arrangement of active sites, leading to the reconstruction of hydrotalcite-like phase, occurred during the catalytic test. |
| Keywords: | rehydration Hydrotalcite mixed Mg-Al oxides acetone aldolization |
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