PRODUCTION METHOD OF DIPHENYL CARBONATE, DIPHENYL CARBONATE OBTAINED BY THE PRODUCTION METHOD, POLYCARBONATE PRODUCED FROM THE DIPHENYL CARBONATE, CATALYST FOR PRODUCTION OF DIPHENYL CARBONATE, AND PRODUCTION METHOD OF THE CATALYST

摘要

PROBLEM TO BE SOLVED: To provide a production method of diphenyl carbonate by a decarbonylation reaction of diphenyl oxalate in the presence of a catalyst, in which high-purity diphenyl carbonate can be simply, efficiently, stably and continuously produced by using an easy-to-handle catalyst.SOLUTION: In the production method of diphenyl carbonate, a catalyst is supplied as an adduct of an asymmetric tetraarylphosphonium halide and hydrogen halide. Diphenyl carbonate is obtained by the production method of diphenyl carbonate. The catalyst used is preferably an adduct obtained by crystallizing an asymmetric tetraarylphosphonium halide in contact with a hydrogen halide acid and a solvent. The asymmetric tetraarylphosphonium halide is preferably an asymmetric tetraarylphosphonium chloride having no benzyl proton; and the hydrogen halide is preferably hydrogen chloride. The asymmetric tetraarylphosphonium chloride is more preferably 4-t-butylphenyltriphenylphosphonium chloride. The catalyst preferably has an average particle diameter of 50 μm or more and 1 mm or less.