Separation of copper and polyvinyl chloride from thin waste electric cables: A combined PVC-swelling and centrifugal approach

Jing Xu, Shogo Kumagai, Tomohito Kameda, Yuko Saito, Kenshi Takahashi, Hiroshi Hayashi, Toshiaki Yoshioka

研究成果: Article査読

9 被引用数 (Scopus)

抄録

Waste electric cables from end-of-life vehicles and electronic and electrical equipment present a significant problem in terms of environmental protection and resource recycling. Herein we detail a novel recycling method for thin waste electric cables, by combining polyvinyl chloride (PVC) swelling and centrifugal separation to simultaneously recover PVC and high-purity copper. PVC coverings were swollen in an organic solvent at ambient temperatures, which creates a gap between the covering and the copper wire and facilitates centrifugal separation. Electric cables (12 g) were 100% separated, and more than 95% of the plasticizer was extracted by stirring in 100-mL acetone or ethyl acetate that facilitated the separate recovery of copper, the PVC covering, and the plasticizer. In contrast, >97% separation, with <10% extraction of the plasticizer, was achieved with a mixture of 10 mL butyl acetate and 90 mL water. High-purity copper and PVC with controlled plasticizer content were recovered, which is highly advantageous for recycling both copper and PVC.

本文言語English
ページ(範囲)27-36
ページ数10
ジャーナルWaste Management
89
DOI
出版ステータスPublished - 2019 4 15

ASJC Scopus subject areas

  • 廃棄物管理と処理

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