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Abstract In carbonylation of ethylene glycol to ethylene carbonate with urea catalyzed by ZnO, which was considered as a heterogeneous catalyst. ZnO is observed to be dissolved in the reactants… Click to show full abstract
Abstract In carbonylation of ethylene glycol to ethylene carbonate with urea catalyzed by ZnO, which was considered as a heterogeneous catalyst. ZnO is observed to be dissolved in the reactants probably due to the formation of Zn(NCO) 2 (NH 3 ) 2 making the reaction homogeneously catalyzed. To our knowledge, it is firstly reported that the reaction experienced three states including ZnO dissolution, homogeneous catalysis, and precipitate formation. The precipitate was characterized to be a mixture containing Zn(OH) 2 , ZnCO 3 , and Zn(NCO) 2 with a ratio of 8.5:6.1:1. Possible mechanisms of ZnO dissolution and precipitation were proposed.
Journal Title: Catalysis Communications
Year Published: 2017
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