PROCESS FOR PURIFYING POLYCARBONATE RESIN

摘要

PROBLEM TO BE SOLVED: To provide a process for purifying a polycarbonate resin whereby a polycarbonate resin having a markedly good hue and being substantially free from deterioration in hue with the lapse of time by an efficient and simple process. SOLUTION: This is a process for purifying a polycarbonate resin, which process comprises: (i) mixing an organic solvent solution of the polycarbonate resin with a chelating agent in an amount sufficient to remove contaminant metals from the polycarbonate resin and water: (ii) separating the organic solvent solution phase from the water phase; and (iii) recovering the polycarbonate resin from the obtained organic solvent solution phase.