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Chemical recycling of flexible PVC by oxygen oxidation in NaOH solutions at elevated temperatures
Author(s) -
Yoshioka T.,
Furukawa K.,
Sato T.,
Okuwaki A.
Publication year - 1998
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19981003)70:1<129::aid-app13>3.0.co;2-2
Subject(s) - oxalic acid , phthalic acid , oxygen , polymer chemistry , chemistry , nuclear chemistry , degradation (telecommunications) , materials science , organic chemistry , telecommunications , computer science
Oxidative degradation of a flexible PVC pellet (F‐PVC) with oxygen was carried out in 1–25‐mol/kg(m)‐H 2 O NaOH solutions, at 150–260°C and $P_{{O}_{2}}$ 1–10 MPa. Dehydrochlorination of F‐PVC occurred first, followed by oxidation. The major products were oxalic acid, a mixture of benzenecarboxylic acids, and CO 2 . We obtained 320 g of oxalic acid and 130 g of benzenecarboxylic acids (as phthalic acid) from 1 kg of F‐PVC under conditions of a 15‐m NaOH solution at 250°C and a $P_{{O}_{2}}$ of 5 MPa for 5 h. © 1998 John Wiley & Sons, Inc. J. Appl. Polym. Sci. 70: 129–135, 1998