Abstract
Recycling of such waste plastics (MWP) has progressed since the recycling law was carried out in 1997 because expensive recycling fee was paid. Especially, recycling of used PET bottles advances and is to be applied in chemical recycling as B to B due to its purity and the recycling fee. The recycling fee made possible even the chemical recycling of chlorine-containing MWP and their recycling amount increased drastically. The processes and fundamental dechlorination in thermal degradation and in NaOH solutions were reviewed briefly. A plan using such dechlorinated MWP for reduction of carbon dioxide has been proposed and it has been stressed that the goal of dropping the recycling fee should be that for the garbage treatment cost.
