Journal
CATALYSIS COMMUNICATIONS
Volume 10, Issue 5, Pages 655-658Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2008.11.018
Keywords
Urea; Alcohol; Dialkyl carbonate; Alkyl carbamate; Zinc oxide; Diammine zinc isocyanate
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Funding
- State Key Program for Development and Research of China [2006BAC02A08]
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Zinc oxide (ZnO) was considered as an ideal heterogeneous catalyst for the synthesis of dialkyl carbonate from urea and alcohols in the previous works. However, according to the recent results of XRD, FTIR, TG-DSC and element analysis, ZnO was evidently found to be the precursor of homogenous catalyst Zn(NH3)(2)(NCO)(2). Such a species could be formed via the coordination of NH3 to Zn(NCO)(2), which originated from the reaction of ZnO with HNCO, the latter was the product of urea thermal decomposition. (c) 2008 Elsevier B.V. All rights reserved.
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