Synthesis of methyl acetoacetate from acetone and dimethyl carbonate with alkali-promoted MgO catalysts |
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Authors: | Dudu Wu Zhi Chen |
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Institution: | (1) State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing, 210009, China; |
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Abstract: | The synthesis of methyl acetoacetate (MAA) by methoxycarbonylation of acetone with dimethyl carbonate (DMC) was carried out
in the presence of MgO and alkali-promoted MgO catalysts. From among Li, Na, K, and Cs, potassium was found to be the most
effective promoter to improve the activity of MgO. The effect of K/MgO with variable content of K was also investigated, and
the individual catalysts were characterised by the XRD, BET, SEM, CO2-TPD, and in situ CO2 IR techniques. The results showed that the addition of a small amount of K (1.97 mass %) could promote MAA formation, but
a higher K loading caused a decrease in the yield of MAA, which might result from particle agglomeration and the presence
of stable potassium carbonates. In situ FTIR experiments of co-adsorbed reactants indicated that the reaction probably proceeded
via abstraction of Hα from acetone by base sites. |
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Keywords: | |
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