PREPARATION METHOD OF DIPHENYL CARBONATE USING TIN COMPOUND COORDINATED WITH SULFURIC ACID DERIVATIVE AS CATALYST

摘要

PURPOSE: A method for preparing diphenyl carbonate using a tin compound coordinated with a sulfuric acid derivative as a catalyst is provided, to obtain diphenyl carbonate used as a source material of polycarbonate with a high yield without side reaction in a wider temperature range within a short time. CONSTITUTION: The method comprises the step of reacting dimethyl carbonate and phenol in a catalyst which is an organic tin compound having a sulfuric acid derivative represented by the formula 1 as a ligand, wherein R is an alkyl group of C1-C6 or a phenyl group; R1 is a halogen atom, an alkyl group of C1-C6, a haloalkyl group of C1-C6 or a tolyl group; and n is 1 or 2. Preferably the content of the catalyst is 0.1-10 mol% based on the amount of dimethyl carbonate; the molar ratio of phenol to dimethyl carbonate is 2-20; reaction temperature is 130-250 deg.C; and the reaction time is 1-24 hours.