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Transesterification between dimethyl carbonate and phenol in the presence of (NH4)8Mo10O34 as a catalyst precursor

Paper ID Volume ID Publish Year Pages File Format Full-Text
42450 45926 2009 6 PDF Available
Title
Transesterification between dimethyl carbonate and phenol in the presence of (NH4)8Mo10O34 as a catalyst precursor
Abstract

The novel catalyst system (NH4)8Mo10O34 was found to be active for transesterification between dimethyl carbonate and phenol based on the comparisons of performance over Sn-, Pb- and Mo-based metal complexes. X-ray diffraction (XRD), inductively coupled plasma–atomic emission spectroscopy (ICP–AES), the temperature-programmed desorption (TPD) with mass spectroscopy, thermogravimetic analysis (TGA), Infrared spectroscopy (FT-IR), and Raman spectroscopy were conducted to characterize the catalysts. (NH4)8Mo10O34 can be formed from (NH4)6Mo7O24·4H2O through calcinations at ∼423 K. The Mo species dissolved from (NH4)8Mo10O34 appeared to play the main part in this reaction. This homogeneous catalyst showed the superior turnover frequency to those of the homogeneous lead complexes obtained from PbO. The activation energy was determined to be 87.1 kJ mol−1.

Graphical abstractThe novel catalyst system (NH4)8Mo10O34 was found to be active for transesterification between dimethyl carbonate and phenol based on the comparisons of performance over Sn-, Pb- and Mo-based metal complexes. X-ray diffraction (XRD), inductively coupled plasma–atomic emission spectroscopy (ICP–AES), the temperature-programmed desorption (TPD) with mass spectroscopy, thermogravimetic analysis (TGA), Infrared spectroscopy (FT-IR), and Raman spectroscopy were conducted to characterize the catalysts. (NH4)8Mo10O34 can be formed from (NH4)6Mo7O24·4H2O through calcinations at ∼423 K. The Mo species dissolved from (NH4)8Mo10O34 appeared to play the main part in this reaction. This homogeneous catalyst showed the superior turnover frequency to those of the homogeneous lead complexes obtained from PbO. The activation energy was determined to be 87.1 kJ mol−1.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Transesterification; Dimethyl carbonate (DMC); Methylphenyl carbonate (MPC); Diphenyl carbonate (DPC); (NH4)8Mo10O34
First Page Preview
Transesterification between dimethyl carbonate and phenol in the presence of (NH4)8Mo10O34 as a catalyst precursor
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 361, Issues 1–2, 20 June 2009, Pages 26–31
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis