MANUFACTURING METHOD OF DIPHENYL CARBONATE AND MANUFACTURING METHOD OF POLYCARBONATE

摘要

PROBLEM TO BE SOLVED: To manufacture high purity diphenyl oxalate efficiently, stably and continuously with a simple method.SOLUTION: There is provided a manufacturing method of diphenyl carbonate by a decarbonylation reaction of diphenyl oxalate in the presence of a catalyst, where the diphenyl oxalate contains 0.076 wt.% or more and 10 wt.% or less of phenyl carbonate ester represented the following general formula (1), where n is 1 or 2. It preferably has a first step for manufacturing diphenyl carbonate by a decarbonylation reaction, a second step for separating the diphenyl carbonate manufactured in the first step and a catalyst liquid and a third step for recycling at least a part of the catalyst liquid separated in the second step to the first step in this order. There is provided a manufacturing method of polycarbonate including a condensation polymerization with a dihydroxy compound after manufacturing the diphenyl carbonate by the method.SELECTED DRAWING: None