Applied Organometallic Chemistry p. 576 - 580 (2010)
Update date:2022-08-17
Topics:
Mo, Wanling
Xiong, Hui
Hu, Jianglin
Ni, Youming
Li, Guangxing
The catalytic properties of CuXn/N-ligands (X=Cl, Br and I; n = 1 or 2) in oxidative carbonylation ofmethanolwere investigated. It was found that the interaction of halogen anions, N-ligands and Cu (I) affected the catalytic performance of copper complex catalyst in the reaction, especially iodide anion and 1,10-phenanthroline (Phen). When CuI/Phen was used as a catalyst, the conversion of methanol was 42.6%, the selectivity to dimethyl carbonate was 99.2% and the TOF was 13.1 h-1 at an optimized conditions: CuI/Phen 0.2 mol l-1, 120 °C, 2 h, 2.4 MPa, PCO/PO2 = 2:1. Compared with the plain CuI catalyst, the catalytic activity of CuI/Phen increased about 36 times.When CuI/Phen catalystwas immobilized on polystyrene (PS), the heterogenized catalyst,CuI/Phen-NH-PS, also exhibited veryhigh catalytic activity in oxidative carbonylation. The CuI/Phen - NH - PS catalyst remained its high catalytic activity even after seven recycles. The average weight loss of CuI/Phen - NH - PS after reaction was less than 1.0%, and the leaching of copper was only about 0.15% in each recycling test. Copyright
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