Patent ID: 6197918
Filing Date: 2001-03-06
Classification: C07C,C08G

Abstract:
A method for manufacturing aromatic carbonates, comprising reacting a dialkyl carbonate and an aromatic hydroxy compound in the presence of a catalyst to produce aromatic carbonates while distilling off by-product alcohols and by-product dialkyl carbonates from a reaction system, wherein:(i) the aromatic hydroxy compound is a crude compound mixture which comprises an aromatic hydroxy compound and 0.5 to 10 wt % of an aromatic polyhydric hydroxy compound,(ii) a titanium compound expressed by TiX.sub.3 or TiX.sub.4 (here, X indicates a halogen atom, an acetoxy group, an alkoxy group or an aryloxy group) is used as the catalyst, and(iii) when the catalyst is calculated in terms of titanium atoms, the amount of catalyst used is an amount that satisfies the following relationship with respect to the aromatic polyhydric hydroxy compound contained in the aromatic hydroxy compound:aromatic polyhydric hydroxy compound / titanium atoms (molar ratio)>2.