Microwave Irradiation Assistance and Catalyzed Hydrolytic Depolymerization Of Poly(Ethylene Terephthalate) (PET) Waste Bottles | ||
| Al-Mustansiriyah Journal of Science | ||
| Article 1, Volume 23, Issue 1, January 2012, Pages 55-64 | ||
| Author | ||
| Hussain I. Khalaf | ||
| Abstract | ||
| The depolymerization of poly(ethylene terephthalate) (PET) waste bottles was investigated under microwave irradiation. Domestic microwave oven were modified for this purpose. PET bottles was shredded and grinded to < 5 mm particle size and subjected to basic hydrolysis to terephthalic acid (TPA) and ethylene glycol using 10 % NaOH under influence of microwave irradiation in presence charcoal as catalyst. The optimum conditions were investigated such as irradiation time, base concentration, particle size, absorber (catalyst) quantity, and microwave irradiation power. High purity of TPA was precipitated from terephthalate ion (formed during the basic hydrolysis) by addition of hydrochloric acid. Results show that the optimum conditions to give higher percentage of TPA was 10 % NaOH, 60 min, 600 W power, and 30 %wt/wt charcoal/PET, 90% TPA was obtained. | ||
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