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http://dx.doi.org/10.9713/kcer.2011.49.6.732

Effect of Metal Oxide Catalysts and Ionic Liquids on the Synthesis of Methyl Carbamate and Dimethyl Carbonate from Urea and Methanol under High Pressure Reaction System  

Kim, Yun-Min (Alternative Chemicals/Fuel Research Center, Green Chemistry Division, Korea Research Institute of Chemical Technology)
Kim, Chul-Ung (Alternative Chemicals/Fuel Research Center, Green Chemistry Division, Korea Research Institute of Chemical Technology)
Koh, Jae-Cheon (Alternative Chemicals/Fuel Research Center, Green Chemistry Division, Korea Research Institute of Chemical Technology)
Park, Dae-Won (Department of Chemical Engineering, Pusan National University)
Koo, Kee-Kahb (Department of Chemical & Biomolecular Engineering, Sogang University)
Publication Information
Korean Chemical Engineering Research / v.49, no.6, 2011 , pp. 732-738 More about this Journal
Abstract
Effect of metal oxide catalysts and ionic liquids on the synthesis of methyl carbamate(MC) and dimethyl carbonate (DMC) from urea and methanol was investigated in a high pressure reaction system. In closed system, MC yield from urea and methanol reached almost 100% at reaction temperature over $150^{\circ}C$ without catalyst, whereas DMC yield of 1.5% under was obtained irrespective of catalysts used. In DMC synthesis from MC and methanol, $ZnCl_{2}$ showed the highest catalytic activity and led to the DMC yield of 16.3% under optimal conditions. Furthermore, DMC yield can be enhanced by the simultaneous application of ionic liquids with nano-sized catalysts in semi-continuous reaction system.
Keywords
Dimethyl Carbonate; Methyl Carbamate; Metallic Oxide Catalyst; Ionic Liquid;
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Times Cited By KSCI : 4  (Citation Analysis)
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