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A series of layered double hydroxides (LDHs) containing Mg 2+ or Ni 2+ as divalent and Al 3+ or Ga 3+ as trivalent cations were used as catalysts in order to substitute NaOH in the selective condensation of acetone into diacetonealcohol. With this aim the LDHs were totally exchanged with OH - anions and acquired the meixnerite-like structure,...
A study on the catalytic properties of properly activated hydrotalcite (HT) with special attention to the nature and amount of active sites present in this solid base catalyst has been undertaken. Only a small fraction (5%) of the available basic sites in the rehydrated calcined HT is active in liquid-phase aldol condensations. These sites exhibit high catalytic activity and are most likely localized...
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