Patent ID: 6720443
Filing Date: 2004-04-13
Classification: B01J,C07C

Abstract:
A method for preparing an aromatic carbonate represented by formula (7):ROâ€”COâ€”ORâ€²â€ƒâ€ƒ(7) wherein, R and Râ€² are identical to or different from each other, and are each a substituted or unsubstituted aryl having 6 to 10 carbon atoms; characterized in that, in a method for preparing the aromatic carbonate from an aromatic hydroxy compound, carbon monoxide and oxygen in the presence of a quaternary ammomum or phosphonium salt, and a redox reagent, and in the presence or absence of a base, the reaction is carried out by using a catalyst for the synthetic reaction of an aromatic carbonate in which a palladium compound is supported on the perovskite-type composite oxide represented by the following formula (1â€²): L(1âˆ’x)Lâ€²xLâ€³Oyâ€ƒâ€ƒ(140 ) (wherein L is a group IIA or IVA metal taking a divalent state in the form of an oxide; x is a number of 0 to 1; Lâ€² is a metal having an ionic radius of 0.90 Ã¥ or more; Lâ€³ is a group IVA, IVB or IIIB metal taking a tetravalent state in the form of an oxide; y is a number of 2.5 to 3.5) and the palladium accounts for 0.01 to 15% of the catalyst by weight.