A simple scheme for a mesoporous silica-anchored organotin catalyst was developed for the transesterification of dimethyl carbonate with phenol to diphenyl carbonate. N2-sorption, TEM, UV–Vis, and elemental analysis combined with 29Si and 13C NMR measurements evidenced the formation of mesoporous organic–inorganic hybrid silica with a highly dispersed tetrahedral Sn species. The catalyst exhibited excellent activity and reusability in the transesterification. With a catalyst of 1.0 g, a reaction temperature of 150–180 °C, and a reaction time of 9 h, the phenol conversion and transesterification selectivity reached 51.1 and 99.9 %, respectively. The phenol conversion just decreased from 41.2 to 35.0 % after five runs with 0.5 g of catalyst. The improved stability was attributed to the strong covalent bonding between the organotin and mesoporous silica.
Research on Chemical Intermediates – Springer Journals
Published: Apr 27, 2016
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