Abstract: A composite oxide CuO-ZnO catalyst was prepared and tested in the degradation of various polyureas using urea as the carbonyl source for the first time in this field. Under the optimized reaction conditions, a 96% diethyl hexamethylenedicarbamate (EHDC) yield was obtained with polyurea-hexamethylenediamine (PU-HDA) over the CuO-ZnO catalyst. The characterization results of the structural and component properties of the prepared catalyst indicated that the Zn-rich polycrystalline oxide with good dispersion exhibited enhanced catalytic activity in this reaction system. Moreover, the catalytic mechanism of the CuO-ZnO catalyst in polyurea degradation was proposed and investigated preliminarily. KeyWords Plus: NON-PHOSGENE ROUTE; FUNCTIONAL IONIC LIQUID; PHENYL CARBAMATE; CARBON-DIOXIDE; OXIDATIVE CARBONYLATION; DIMETHYL CARBONATE; ALKYL CARBAMATE; GREEN SYNTHESIS; CO2; UREA Pbulished in GREEN CHEMISTRY, 18 (22):6091-6098; 10.1039/c6gc01884j 2016 |
Introduction
