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a highly efficient catalyst for DMC synthesis through the
transesterification reaction of EC with methanol under mild
reaction conditions. A 77% yield and 97% selectivity of
DMC were obtained under optimal reaction conditions. It is
worth mentioning that EC was completely converted to
DMC when the product was simultaneously removed through
distillation under atmospheric pressure. This catalytic system
can be used with various alcohols and alkylene carbonates,
obtaining the corresponding dialkyl carbonates. Variation of
catalytic activity towards different substrates is correlated
with steric effect, electronic effect, and pore diffusion limita-
tion of the NaZSM-5 zeolite. In addition, the catalyst can be
recovered by simple filtration with retention of catalytic ac-
tivity. These characteristics make it an ideal catalyst system
for DMC production in terms of green process and potential
industrial applications. Further applications of NaZSM-5 zeo-
lite towards other reactions are currently under investigation
in our laboratory.
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Acknowledgements
We gratefully acknowledge the National Natural Science
Foundation of China (No. 20672054, 20872073), the 111
project (B06005), and the Committee of Science and Tech-
nology of Tianjin for financial support.
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