title: Transesterification of diethyl oxalate with phenol over sol-gel MoO(3)/TiO(2) catalysts.
abstract: The transesterification of diethyl oxalate (DEO) with phenol to form diphenyl oxalate (DPO) has been carried out in the liquid phase over very efficient MoO(3)/TiO(2) solid-acid sol-gel catalysts. A selectivity of 100 % with a remarkable maximum yield of 88 % were obtained, which opens the route to downstream phosgene-free processes for the synthesis of polycarbonates. Interpretation of the results of various acidity measurements (NH(3) and pyridine desorption, methanol oxidation as a probe reaction) allowed us to identify the catalytic sites as Lewis acid sites.
authors: Catalysis Division, National Chemical Laboratory, Pune, 411008, India.
authors: Trupti
authors: T
authors: Kotbagi
authors: Duy Luan
authors: DL
authors: Nguyen
authors: Christine
authors: C
authors: Lancelot
authors: Carole
authors: C
authors: Lamonier
authors: Kaew-Arpha
authors: KA
authors: Thavornprasert
authors: Zhu
authors: Z
authors: Wenli
authors: Mickaël
authors: M
authors: Capron
authors: Louise
authors: L
authors: Jalowiecki-Duhamel
authors: Shubhangi
authors: S
authors: Umbarkar
authors: Mohan
authors: M
authors: Dongare
authors: Franck
authors: F
authors: Dumeignil
mesh_terms: D002384:Catalysis; D004951:Esterification; D006863:Hydrogen-Ion Concentration; D008982:Molybdenum / Q000737:chemistry*; D010070:Oxalates / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D019800:Phenol / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*
chemical_list: D010070:Oxalates; D010087:Oxides; C009495:titanium dioxide; C082290:molybdenum trioxide; D019800:Phenol; D008982:Molybdenum; D014025:Titanium