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Erschienen in: Journal of Material Cycles and Waste Management 2/2021

05.01.2021 | SPECIAL FEATURE: ORIGINAL ARTICLE

One-pot wet ball-milling for waste wire-harness recycling

verfasst von: Harendra Kumar, Shogo Kumagai, Tomohito Kameda, Yuko Saito, Toshiaki Yoshioka

Erschienen in: Journal of Material Cycles and Waste Management | Ausgabe 2/2021

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Abstract

In this study, we developed a one-pot wet ball-milling method for the recovery of highly pure copper wire, poly(vinyl chloride) (PVC) coating, and diisononyl phthalate (DINP) plasticizer from waste wire harnesses. n-Butyl acetate, acetone, or ethyl acetate was used as the solvent to simultaneously extract the DINP and separate the Cu and PVC, by swelling the PVC coating and physically impacting the cables with milling balls, achieving the whole process in one pot. The swelling ratios suggested the order of solvent power for PVC as n-butyl acetate > acetone > ethyl acetate at ~ 25 °C after 80-min submersion; while on increasing temperature, this order changed to acetone > n-butyl acetate > ethyl acetate. Due to the temperature rise induced by oblique ball-to-ball and ball-to-reactor collisions during milling, acetone exhibited the best separation efficiency, achieving complete separation of 20-cm-long cables in 40-min wet milling at 25 rpm, with the simultaneous, nearly quantitative recovery of DINP. Of the recovered Cu wires, nearly ~ 90% exceeded 10-cm lengths, which facilitated quantitative recovery in the separation step. Furthermore, 100% of the de-plasticized PVC was recovered, and ~ 85% of the solvent was regenerated by distillation for re-use.

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Metadaten
Titel
One-pot wet ball-milling for waste wire-harness recycling
verfasst von
Harendra Kumar
Shogo Kumagai
Tomohito Kameda
Yuko Saito
Toshiaki Yoshioka
Publikationsdatum
05.01.2021
Verlag
Springer Japan
Erschienen in
Journal of Material Cycles and Waste Management / Ausgabe 2/2021
Print ISSN: 1438-4957
Elektronische ISSN: 1611-8227
DOI
https://doi.org/10.1007/s10163-020-01163-7

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