Microwave assisted ecofriendly recycling of poly (ethylene terephthalate) bottle waste

Pingale, Navnath; Shukla, S. R.

doi:10.1016/j.eurpolymj.2008.09.019

Cited by 114 publications

(82 citation statements)

References 18 publications

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“…Pingale and Shukla [4] research group had been used zinc acetate, sodium carbonate, sodium bicarbonate and barium hydroxide as catalyst for glycolysis PET by using microwave as energy source. In our previously reported data, we glycolized PET by using DEG as the solvent and NaOH as the catalysts under microwave irradiation [5] .…”

Section: Introductionmentioning

confidence: 99%

Recovery of Terephthalic Acid by employing magnetic nanoparticles as a solid support

et al. 2018

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Section: Introductionmentioning

confidence: 99%

Recovery of Terephthalic Acid by employing magnetic nanoparticles as a solid support

et al. 2018

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“…They found zinc acetate to be the most effective catalyst (Table 3, 78% BHET), followed by zinc stearate (Table 3, 65% BHET) and finally zinc sulfate (Table 3, 25% BHET). Analogously, Pingale and Shukla [172], Duque-Ingunza and coworkers [203,204,206,212] studied PET-glycolysis using different sodium catalysts with different anions (carbonate, bicarbonate and sulfate). The effectiveness of the sodium catalysts on glycolysis yielding BHET decreased in the following order: sodium bicarbonate > sodium carbonate > sodium sulfate.…”

Section: Glycolysismentioning

confidence: 99%

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

Geyer¹,

Lorenz²,

Kandelbauer³

2016

Express Polym. Lett.

194

117

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Abstract.Recycling of poly(ethylene terephthalate) (PET) is of crucial importance, since worldwide amounts of PETwaste increase rapidly due to its widespread applications. Hence, several methods have been developed, like energetic, material, thermo-mechanical and chemical recycling of PET. Most frequently, PET-waste is incinerated for energy recovery, used as additive in concrete composites or glycolysed to yield mixtures of monomers and undefined oligomers. While energetic and thermo-mechanical recycling entail downcycling of the material, chemical recycling requires considerable amounts of chemicals and demanding processing steps entailing toxic and ecological issues. This review provides a thorough survey of PET-recycling including energetic, material, thermo-mechanical and chemical methods. It focuses on chemical methods describing important reaction parameters and yields of obtained reaction products. While most methods yield monomers, only a few yield undefined low molecular weight oligomers for impaired applications (dispersants or plasticizers). Further, the present work presents an alternative chemical recycling method of PET in comparison to existing chemical methods.

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“…Another group that investigated the microwave-assisted depolymerization of PET by a number of different chemical degradation methods was that of Shukla and collaborators [24][25][26][27][28]. Pingale and Shukla [24] used a modified microwave oven to carry out glycolysis of PET taken from waste bottles, using EG in the presence of Na 2 C 2 O 4 , Zn(CH 3 COO) 2 , Na 2 CO 3 and BaOH catalysts under reflux.…”

Section: Poly(ethylene Terephthalate)mentioning

confidence: 99%

“…Pingale and Shukla [24] used a modified microwave oven to carry out glycolysis of PET taken from waste bottles, using EG in the presence of Na 2 C 2 O 4 , Zn(CH 3 COO) 2 , Na 2 CO 3 and BaOH catalysts under reflux. The virtual monomer bis(2-hydroxyethyl) terephthalate (BHET) was recovered.…”

Section: Poly(ethylene Terephthalate)mentioning

confidence: 99%

Polymer Degradation Under Microwave Irradiation

Achilias

2014

Microwave-Assisted Polymer Synthesis

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Development of advanced, environmentally friendly and energy-saving techniques for the chemical recycling of polymers is of paramount importance in the polymer industry. Understanding polymer degradation is the scientific key behind this technological challenge. Recent research on the application of microwave irradiation to polymer degradation is presented in this review. Results have shown the potential advantage of microwaves for complete polymer degradation in a significantly reduced time scale compared with conventional heating. The benefits of using microwave irradiation in the degradation of polyesters [e.g. poly(ethylene terephthalate) and polycarbonate], polyurethanes, polyamides, poly[alkyl (meth)acrylates], polystyrene and other polymers is presented. Moreover, the effect of microwave heating on the pyrolysis of commodity polymers such as polyethylene, is also discussed. Finally, the double role of materials used traditionally as solvents, reagents or catalysts, but now also as microwave absorbers in polymer degradation is explored.

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Microwave assisted ecofriendly recycling of poly (ethylene terephthalate) bottle waste

Cited by 114 publications

References 18 publications

Recovery of Terephthalic Acid by employing magnetic nanoparticles as a solid support

Recovery of Terephthalic Acid by employing magnetic nanoparticles as a solid support

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

Polymer Degradation Under Microwave Irradiation

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