In the preparation of MgO, Mg(OH)2 was placed in a muffle furnace maintained at a desired temperature for rapid increase to the activation temperature and for short-time heating. The MgO obtained showed a higher activity for the retro-aldol reaction of diacetone alcohol and larger surface area in comparison with that prepared by conventional procedures. Among the prepared catalysts, MgO heated at 673 K for 20 min showed the highest activity. The prepared MgO has a wide and thin plate shape with a small crystal size. The surface area of MgO decreased monotonously with increase in heating time and temperature. Further thermal treatment produced a decrease in catalytic activity. After that, the activity was regenerated by a long-time thermal treatment. The change in crystal morphology and exposed surface crystal plane of MgO by thermal treatment is discussed.
Research on Chemical Intermediates – Springer Journals
Published: Mar 11, 2015
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