Development of Dechlorination Technology for the Liquefaction Recycling of Municipal Waste Plastics

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  • 使用済みプラスチック製容器包装油化リサイクルにおける脱塩素技術の開発
  • シヨウズミ プラスチックセイ ヨウキ ホウソウ ユカ リサイクル ニ オケル ダツエンソ ギジュツ ノ カイハツ

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Abstract

It is necessary to efficiently remove chlorine from polyvinyl chloride (PVC) and other waste plastics containing chlorine using thermal degradation liquefaction technologies for municipal waste plastics (MWP). In particular, the chlorine content of reclaimed oil products must be kept less than 100ppm due to the quality standard for pyrolysis oil in Japan. As a result, liquefaction recyclers have given up on liquefaction for MWP, because they have been unable to reduce the chlorine content. Even now, the dechlorination technology of liquefaction for MWP is an important issue for study. On the other hand, twin-screw extruders, which have been developed for dechlorination technologies used in blast furnaces and coke ovens, show shorter reaction times for dechlorination than other dechlorination technologies.<BR>This study focused on the dechlorination ability of the screw extruder, and started with the single-screw extruder for dechlorination. The single-screw extruder was able to achieve high-efficiency dechlorination.<BR>These technologies have been operated commercially by Sapporo Plastic Recycling Co., Ltd. since 2000.

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