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Citation: LI Guang-Xing, ZHU Yong-Qiang, MO Wan-Ling, XIONG Hui, MEI Fu-Ming, XIAHOU Wen-Zhao. Synthesis of Diethyl Carbonate by Oxidative Carbonylation of Ethanol over Homogeneous CuCl/Schiff-base Catalyst[J]. Chinese Journal of Applied Chemistry, ;2003, 20(2): 163-166. shu

Synthesis of Diethyl Carbonate by Oxidative Carbonylation of Ethanol over Homogeneous CuCl/Schiff-base Catalyst

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

Corresponding author: LI Guang-Xing,
Received Date: 9 July 2002
Available Online: 29 November 2002

Catalytic synthesis of diethyl carbonate(DEC) by oxidative carbonylation of ethanol in homogeneous CuCl/Schiff-base system has been studied as functions of N-donor ligand, reaction time, temperature, water content and ratio of N-methyl imidazole(NMI) to 1,10-phenanthroline(phen). Catalytic system with CuCl/phen/NMI was found to have a favorable activity in the oxidative carbonylation. Under conditions of 120℃, 2.4 MPa(CO+O₂), concentration of CuCl 0.20 mol/L, n(NMI):n(CuCl)=1.25:1, n(NMI): n(phen)=1:1, in 3 hours, conversion of ethanol reached 13.6%, 3 times as much as that of plain CuCl system, with selectivity of DEC being over 99.0%. The catalytic activity of the catalytic system studied could be used repeatedly 4 times without significant loss of activity in the oxidative carbonylation.
- diethyl carbonate,
- oxidative carbonylation,
- CuCl/Schiff-base catalyst
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