塩素系合成ゴムの熱分解における固体残渣中の塩素,硫黄,金属の残留状態

概要

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For the recycling of waste rubber, the behavior of chlorine, sulfur and metals in solid residue during the thermal decomposition process of chlorinates synthetic rubbers with N2 atomosphere at a maximum temperature of 800°C and a temperature rate of 5 K/min was investigated. The experimental results obtained by employing chloroprene (CR) and nitrile butadiene rubbers mixed with polyvinyl chloride (NBR/PVC) are summarized as follows : 1) More than 90 wt% of the chlorine contained in CR was converted to HCl gas, while about 60 wt% of sulfur remained in the solid residue. ZnCl2 was formed by the chlorination of ZnO involved in CR during the thermal decomposition of the CR, and migrated from the solid residue by volatilization. As a result, no zinc was observed in the solid residue of CR. 2) Chlorine compounds generated from thermal decomposition of NBR/PVC were captured in the form of CaCl2 by CaCO3 filler, with a part of the CaCl2 remaining in the solid residue. Most of the sulfur was converted to sulfurous gases, while CaS was found as a remainder in the solid residue.
一般社団法人廃棄物資源循環学会の論文
2003-05-31