METHOD FOR PRODUCING DIPHENYL CARBONATE, DIPHENYL CARBONATE OBTAINED BY SAID PRODUCTION METHOD, POLYCARBONATE PRODUCED FROM SAID DIPHENYL CARBONATE, CATALYST FOR DIPHENYL CARBONATE PRODUCTION, METHOD FOR PRODUCING SAID CATALYST, CATALYST RECOVERY AND REUSE METHOD

摘要

The purpose of the present invention is a method for producing diphenyl carbonate by a decarbonylation reaction of diphenyl oxalate in the presence of a catalyst wherein high purity diphenyl carbonate is produced simply efficiently stably and continuously using an easy to handle catalyst without problems such as clogging due to catalyst precipitation. Another purpose is to recover and reuse a high purity catalyst efficiently by a simple method. The present invention pertains to a method for producing diphenyl carbonate by a decarbonylation reaction of diphenyl oxalate in the presence of a catalyst wherein the method for producing diphenyl carbonate is characterized by supplying the catalyst as an adduct of an asymmetric tetraarylphosphonium halide and hydrogen halide.