关键词: 丙酮, 碳酸二甲酯, 乙酰乙酸甲酯, Mg/Al复合氧化物

Abstract: A series of Mg/Al mixed oxides with different Mg/Al mole ratios were prepared by calcining hydrotalcite obtained via the co-precipitation method followed hydrothermal treatment. The samples were characterized by using ICP，XRD，CO2-TPD and N2 adsorption/desorption techniques. The results showed that the structure and basicity of samples were affected by Mg/Al mole ratio. Besides，these Mg/Al mixed oxides were effective catalysts for the synthesis of methyl acetoacetate from acetone and dimethyl carbonate. More importantly，they all presented much higher catalytic ability than the pure MgO or Al2O3. At the same time，the catalytic performance of mixed oxides was correlated with their moderate basicity，and the catalyst exhibited the highest catalytic ability when the initial Mg/Al mole ratio was 2. Furthermore，reusability test indicated that these Mg/Al mixed oxides presented good stability and reusability.

Key words: acetone, dimethyl carbonate, methyl acetoacetate, Mg/Al mixed oxide