Premium
A study on the heterobinuclear site of Co(salen)/TiO 2 SiO 2 catalysts in the oxidative carbonylation of aniline
Author(s) -
Mei FuMing,
Chen LiJuan,
Li GuangXing
Publication year - 2010
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.1577
Subject(s) - chemistry , aniline , catalysis , methanol , carbonylation , selectivity , leaching (pedology) , nuclear chemistry , inorganic chemistry , heterogeneous catalysis , silica gel , oxidative phosphorylation , polymer chemistry , medicinal chemistry , organic chemistry , carbon monoxide , environmental science , soil science , soil water , biochemistry
Titania‐silica immobilized Co(salen) complexes containing the heterobinuclear site were prepared by the sol–gel method for the catalytic synthesis of methyl N ‐phenylcarbamate (MPC) by the oxidative carbonylation of aniline. It was found that the Ti:Si mole ratio had an important effect on the catalytic performance of Co(salen) complexes. When the Ti:Si ratio was 0.1, titania‐silica supported Co(salophen) showed the best catalytic activity. Under the reaction conditions, Co(salophen)/TS‐0.1, 0.5 g, aniline 11 mmol, methanol 25 ml, KI 2.2 mmol, CO:O 2 9:1, total pressure 6 MPa, 150 °C, 3 h, the conversion of aniline and the selectivity of MPC were 60.7 and 88.1%, respectively. The XRD studies showed that titania was highly dispersed in the silica matrix. Co(salophen)/TS‐0.1 was reused five times with no significant loss of the activity, and no Co leaching was observed in the reaction. Copyright © 2009 John Wiley & Sons, Ltd.
Accelerating Research
Robert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom
Address
John Eccles HouseRobert Robinson Avenue,
Oxford Science Park, Oxford
OX4 4GP, United Kingdom