| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a plastic waste disposal process which can efficiently recover active components from the plastic wastes and can effectively inhibit decomposition of useful components and generation of harmful substances through two-stage heat-treating method employing a low heating temperature, a short processing time and an alkaline solution with a low concentration, even when high concentrations of chlorine and additives are present in the plastic wastes. <P>SOLUTION: The disposal process comprises a first treatment step wherein a mixture of the plastic wastes containing a chlorine-containing resin containing a carboxy group-containing additive and the alkaline solution is subjected to high-frequency heating at 100-150°C and a second treatment step wherein a mixture of the treatment residue obtained through the first treatment step and the alkaline solution is subjected to high-frequency heating at 200-250°C. <P>COPYRIGHT: (C)2004,JPO</p> |
