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4435729 
Journal Article 
Dechlorination of polyvinyl chloride in NaOH/ethylene glycol solution by microwave heating 
Osada, F; Yoshioka, T 
2009 
Yes 
Journal of Material Cycles and Waste Management
ISSN: 1438-4957
EISSN: 1611-8227 
SPRINGER 
NEW YORK 
11 
1 
19-22 
English 
WOS:000263379400005 
This study investigated the dehydrochlorination of flexible polyvinyl chloride (PVC) containing 59.2% PVC, 29.7% dioctyl phthalate (DOP), and approximately 12% stabilizers. Flexible PVC was treated with NaOH/ethylene glycol (NaOH/EG) solutions at NaOH concentrations in the range 0.5-4 mol/l and was heated in a microwave heater at a temperature between 100A degrees and 160A degrees C for 0-30 min. All chlorides were completely eliminated by internal heating at 160A degrees C using microwaves for 10 min in a 1 mol/l NaOH/EG solution, and the residue was made up of hydrocarbons. The weight loss rate reached a maximum of 74.7% at a temperature of 160A degrees C. It was discovered that the use of microwaves significantly shortened the reaction time compared to using conventional electric heaters or other external heating systems and also allowed the use of lower concentrations of NaOH. 
Flexible PVC; Flexible PVC waste; High-temperature alkaline solution treatment; Phthalic acid; Microwave heating