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Synthesis of diethylcarbonate by ethanolysis of urea: A study on the recoverability and recyclability of new Zn-based heterogeneous catalysts

Paper ID Volume ID Publish Year Pages File Format Full-Text
39368 45821 2015 7 PDF Available
Title
Synthesis of diethylcarbonate by ethanolysis of urea: A study on the recoverability and recyclability of new Zn-based heterogeneous catalysts
Abstract

•New Zn-based heterogeneous catalysts for the ethanolysis of urea are described.•The role of different frameworks on the stabilization of Zn centres has been determined.•The Zn-leaching in the reaction medium is strongly reduced with respect to pure ZnO.•The new catalysts have a higher specific activity (per Zn-centre) with respect to ZnO.•The heterogeneous catalysts are easily recovered and recycled.

New Zn-based catalysts are described that act as heterogenized or heterogeneous catalysts, with easy recovery and re-utilization with a limited or even zero Zn-leaching. For stabilizing in the heterogeneous form the catalytically active Zn centre, mixed oxides, ZIF-8 and Zn-tethered systems have been synthesized and found to sensibly reduce the leaching of Zn in solution with respect to ZnO, making possible their recovery and reuse. ZIF-8 can be used for long time of reaction, reaching high DEC yields (comparable or higher than those obtained with ZnO) without any significant loss of zinc.

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Keywords
Alcoholysis of urea; Mixed oxides; ZIF-8; Zn-tethered systems; Diethylcarbonate
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Synthesis of diethylcarbonate by ethanolysis of urea: A study on the recoverability and recyclability of new Zn-based heterogeneous catalysts
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 493, 5 March 2015, Pages 1–7
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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