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Citation: MEI Fu-Ming, PEI Zhi, LI Guang-Xing. Transesterification of Dimethyl carbonate with Phenol Catalyzed by Mg-Al Hydrotalcites[J]. Chinese Journal of Applied Chemistry, ;2004, 21(7): 702-707. shu

Transesterification of Dimethyl carbonate with Phenol Catalyzed by Mg-Al Hydrotalcites

1.
Department of Chemistry, Huazhong University of Science & Technology, Wuhan 430074

Corresponding author: LI Guang-Xing,
Received Date: 25 October 2003
Available Online: 26 February 2004

The transesterification of dimethyl carbonate (DMC) with phenol was carried out in the presence of Mg-Al-hydrotalcites with different Mg to Al molar ratio.The Mg-Al hydrotalcite with Mg to Al molar ratio 2:1 showed the highest catalytic activity,and it was more efficient than solid catalysts TiO₂/SiO₂,MoO₃/SiO₂ and CaO.When the reaction was run at 150~185℃ for 12 h at n(PhOH):n(DMC)=2:1 and catalyst concentration (mass fraction)1.5%,the yield of diphenyl carbonate (DPC),methyl phenyl carbonate (MPC) and anisole were 25.8%,11.2% and 12.8%,respectively,and total selectivity for DPC and MPC reached 74.3%.In addition,78% of hydrotalcite could be regenerated after 5 times usage of transesterification without significant loss of its catalytic activity.
- hydrotalcite,
- catalytic transesterification,
- dimethyl carbonate,
- phenol,
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