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Citation: WANG Sheng-Ping, MA Xin-Bin, GUO Hong-Li, WANG Bao-Wei, LI Zhen-Hua, XU Gen-Hui. Synthesis of Diphenyl Oxalate by Transesterification of Dimethyl Oxalate with Phenol over TS-1 Catalyst[J]. Chinese Journal of Applied Chemistry, ;2002, 19(9): 832-836. shu

Synthesis of Diphenyl Oxalate by Transesterification of Dimethyl Oxalate with Phenol over TS-1 Catalyst

1.
State Key Laboratory of C1 Chemistry and Technology, School of Chemical Engineering, Tianjin University, Tianjin 300072

Corresponding author: MA Xin-Bin,
Received Date: 17 January 2002
Available Online: 10 April 2002
Fund Project: 云南省省院省校合作项目(00YT03) (00YT03)

The preparation of diphenyl oxalate(DPO) by transesterification of dimethyl oxalate(DMO) with phenol over TS-1 catalyst(2.5% Ti) has been investigated as function of calcination temperature of the catalyst and reaction time. The catalysts were characterized by FTIR of absorbed pyridine and NH₃-TPD. The results showed that weak Lewis acid sites were the active sites of the catalyst in the transesterification reaction. The optimum calcination temperature appeared to be 550℃ when its effect on the active sites and surface area of the catalysts were taken into consideration. At atmosphere pressure, reaction temperature 180℃, 4 h, n(PhOH): n(DMO)=5:1, 1.8 g catalyst, the following results were obtained:total selectivity of methylphenyl oxalate(MPO) and DPO was 99.3%, DMO conversion 30.0%, MPO yield 26.3% and DPO yield 3.4%.
- diphenyl carbonate,
- diphenyl oxalate,
- transesterification,
- TS-1,
- Lewis acid
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