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A recoverable catalyst Co(salen) in zeolite Y for the synthesis of methyl N-phenylcarbamate by oxidative carbonylation of aniline

Paper ID Volume ID Publish Year Pages File Format Full-Text
42995 45950 2008 6 PDF Available
Title
A recoverable catalyst Co(salen) in zeolite Y for the synthesis of methyl N-phenylcarbamate by oxidative carbonylation of aniline
Abstract

A green process for the synthesis of methyl N-phenylcarbamate (MPC) by the oxidative carbonylation of aniline was studied. In this process, Co(salen) complexes were successfully encapsulated in zeolite Y by a flexible ligand method. The heterogeneous catalysts were characterized by AAS, BET, IR, TGA, XRD and XPS. The catalytic activities of the encapsulated catalysts and their homogeneous analogues were examined in the oxidative carbonylation of aniline to MPC. Under the conditions of aniline (11 mmol), encapsulated catalyst (0.5 g), KI (0.365 g), CO/O2 ratio 9:1, 4 MPa, 170 °C, 3 h, Co(salophen)(OH)2–Y catalyst shows the highest activity with the conversion of 67.1% and the selectivity of 77.3%. Co(salophen)(OH)2–Y could be recycled at least five times and no significant loss of catalytic activity was observed.

Graphical abstractCo(salen) complexes were encapsulated in zeolite Y by a “ship in bottle” method. Such encapsulated complexes were applied as catalysts for the synthesis of methyl N-phenylcarbamate by oxidative carbonylation of aniline. The conversion of 67.1% and the selectivity of 77.3% in the reaction were obtained with Co(salophen)(OH)2–Y. The catalyst could be recycled at least five times without significant loss of its catalytic activity.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Salen; Encapsulation; Carbamate; Oxidative carbonylation
First Page Preview
A recoverable catalyst Co(salen) in zeolite Y for the synthesis of methyl N-phenylcarbamate by oxidative carbonylation of aniline
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 346, Issues 1–2, 31 August 2008, Pages 134–139
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis