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Journal of Material Cycles and Waste Management

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20-02-2021 | SPECIAL FEATURE: ORIGINAL ARTICLE

Chemical recycling of waste Poly Vinyl Chloride (PVC) by the liquid-phase treatment

Authors: Kazushi Nozue, Hideyuki Tagaya

Published in: Journal of Material Cycles and Waste Management | Issue 2/2021

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Abstract

Liquid-phase treatment of waste Poly Vinyl Chloride (PVC) was performed. Chlorine change rate was high when using alcohol, cresol and terpene compared with that observed in the treatment without solvent, so the importance of solvent for dechlorination from PVC was confirmed. By the treatment in alcohol, generation of porous structure was confirmed, which were not observed in the treatment of PVC alone. We were able to propose a method of utilizing carbon resources after chlorine is removed from a different perspective than previous reports. The number of pores and pore size were controlled by adding CO₂ gas and basic compound, especially Na₂CO₃ in 1-Butanol. It indicated that these elements were effective for the production of porous structure based on the liquid-phase treatment. On the other hand, solubilization rate reached near 90% by using terpene at 300 °C in air atmosphere. The most effective solvent for solubilization was o-Cresol and solubilization rate reached to 99.8% at 250 °C in air atmosphere. This result indicates that PVC can be completely decomposed by these solvents in the presence of oxygen. From this research, it is possible to utilize and decompose solid residue by selecting the conditions.

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Title: Chemical recycling of waste Poly Vinyl Chloride (PVC) by the liquid-phase treatment
Authors: Kazushi Nozue
Hideyuki Tagaya
Publication date: 20-02-2021
Publisher: Springer Japan
Published in: Journal of Material Cycles and Waste Management / Issue 2/2021
Print ISSN: 1438-4957
Electronic ISSN: 1611-8227
DOI: https://doi.org/10.1007/s10163-020-01153-9

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