Ball mill-assisted dechlorination of flexible and rigid poly (vinyl chloride) in NaOH/EG solution

Tomohito Kameda, Masahiko Ono, Guido Grause, Tadaaki Mizoguchi, Toshiaki Yoshioka

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Both flexible and rigid forms of poly(vinyl chloride) (PVC) were effectively dechlorinated in NaOH/ethylene glycol (EG) solution during ball mill pulverization. The high degree of dechlorination obtained was attributed to the increased surface area of the crushed PVC particles and the resulting enhancement of contact between the PVC and dissolved hydroxide ions. The common additives diisononyl phthalate and CaCO3 were easily separated from the PVC bulk during the dechlorination reaction. The reaction proceeded under chemical control, with degrees of dechlorination for both flexible and rigid PVC increasing with temperature with apparent activation energies of 110 and 80 kJ/mol, respectively. This reaction was accurately represented by a modified shrinking-core model.

Original languageEnglish
Pages (from-to)8619-8624
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume47
Issue number22
DOIs
Publication statusPublished - 2008 Nov 19

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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