DECHLORINATING TREATMENT OF WASTE RESIN MATERIAL

摘要

PROBLEM TO BE SOLVED: To perform a dechlorinating treatment of waste resin materials, excellent in practicality and capable of removing chlorine from the waste materials containing chlorine without generating chlorine gas by passing through a process of treating the material in a supercritical water. SOLUTION: This method for dechlorinating waste resin materials containing chlorine comprises a process of adding a basic compound (e.g.; calcium hydroxide) into the waste resin materials containing chlorine with melting and kneading, and a process for treating the mixed and kneaded material in a subcritical or a critical state water. Further, as the above-mentioned waste materials, car shredded dusts can be used and it is preferable to set a temperature in the above mixing and kneading at <=300 deg.C, and a temperature in the above treatment at >300 deg.C and <=400 deg.C.