Aminolysis of Poly(Ethylene Terephthalate) Waste for Recovery of Value Added Comonomeric Product

Goje, A. S.; Thakur, Samriti; Diware, V. R.; Chauhan, Y. P.; Mishra, Satyendra

doi:10.1081/ppt-120029971

Cited by 24 publications

(15 citation statements)

References 12 publications

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“…Moreover, it encompasses various treatment methods that result in high end value products from PSW. Such methods include glycolysis (Simon et al, 2014;2015;Sharma and Bansal, 2016), hydrolysis (Campanelli et al, 1993;Evans and Chum, 1991;Panda et al, 2010), pyrolysis (Williams, 2013;Williams and Brindle, 2002;Danon et al 2015a;2015b), aminolysis (Goje et al 2004;Sinha et al, 2010;Sadeghi et al, 2011), gasification (Dou et al, 2016;Wang and Zhao, 2016;Onwudilia and Williams, 2016) and hydrogenation (Bockhorn et al, 1999a;Aznar et al, 2006). However, advanced thermo-chemical treatment (TCT) methods namely pyrolysis has received renewed attention recently due to the numerous operational and environmental advantages it provides given global energy demand and unstable fuel market.…”

Section: Introductionmentioning

confidence: 99%

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

Al–Salem

Антелава

Constantinou

et al. 2017

Journal of Environmental Management

874

435

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Plastic plays an important role in our daily lives due to its versatility, light weight and low production cost. Plastics became essential in many sectors such as construction, medical, engineering applications, automotive, aerospace, etc. In addition, economic growth and development also increased our demand and dependency on plastics which leads to its accumulation in landfills imposing risk on human health, animals and cause environmental pollution problems such as ground water contamination, sanitary related issues, etc. Hence, a sustainable and an efficient plastic waste treatment is essential to avoid such issues. Pyrolysis is a thermo-chemical plastic waste treatment technique which can solve such pollution problems, as well as, recover valuable energy and products such as oil and gas. Pyrolysis of plastic solid waste (PSW) has gained importance due to having better advantages towards environmental pollution and reduction of carbon footprint of plastic products by minimizing the emissions of carbon monoxide and carbon dioxide compared to combustion and gasification. This paper presents the existing techniques of pyrolysis, the parameters which affect the products yield and selectivity and identify major research gaps in this technology. The influence of different catalysts on the process as well as review and comparative assessment of pyrolysis with other thermal and catalytic plastic treatment methods, is also presented.

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Section: Introductionmentioning

confidence: 99%

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

Al–Salem

Антелава

Constantinou

et al. 2017

Journal of Environmental Management

874

435

View full text Add to dashboard Cite

show abstract

“…For example, PET can by recycled by catalytic hydrolysis, 3 aminolysis, 4 alcoholysis, 5 glycolysis, 6 and even the production of copolymers by reaction with other polymers. 7 The hydrolysis of PET catalyzed by acid and by base has been extensively studied [1][2][3] as a means to produce terephthalic acid (TA) and ethylene glycol (EG) for recycling.…”

Section: Introductionmentioning

confidence: 99%

Surface hydrolysis of postconsumer polyethylene terephthalate to produce adsorbents for cationic contaminants

Rosmaninho

Jardim

Moura

et al. 2006

J of Applied Polymer Sci

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In this work, the surface hydrolysis of postconsumer polyethylene terephthalate (PET) was used to produce an ion exchange material to adsorb cationic contaminants from water. The PET surface hydrolyses were carried out in neutral, alkaline, and acid media (NaOH or HNO 3 at 7, 10, and 15 mol L À1) under reflux producing surface carboxylic acid sites (À ÀCOOH) characterized by ATR-IR, pyridine adsorption, titration, TG, and DSC analyses. Acid hydrolysis produced high concentrations of À ÀCOOH (up to 0.5 mmol g À1 PET ), whereas no significant concentration of carboxylic acid sites was obtained by neutral and alkaline hydrolysis. SEM analyses suggest that the acid sites are likely located at the cracks and defects produced on the PET surface by acid hydrolysis. Neutral or alkaline hydrolysis produced a very regular and smooth PET surface with very low acid site concentrations. The adsorption isotherms of Cd þ2 as a model of heavy metal and the dye methylene blue as a model of large organic cationic molecules showed high adsorption capacities for the HNO 3 -hydrolyzed PET, whereas no adsorption takes place on the neutral-or alkaline-hydrolyzed polymer.

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“…The chemical method defines as the depolymerization of PET waste into oligomer. Comparing with the physically recycled PET, which could only be formed to degradative products, the chemically recycled PET through depolymerization could be formed to the polymer itself or some other value added products …”

Section: Introductionmentioning

confidence: 99%

Recycling of waste poly(ethylene terephthalate) into flame‐retardant rigid polyurethane foams

Luo

Huang

et al. 2014

J of Applied Polymer Sci

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Waste poly(ethylene terephthalate) (PET) textiles were effectively chemical recycling into flame-retardant rigid polyurethane foams (PUFs). The PET textile wastes were glycolytically depolymerized to bis(2-hydroxyethyl) terephthalate (BHET) by excess ethylene glycol as depolymerizing agent and zinc acetate dihydrate as catalyst. The PUFs were produced from BHET and polymeric methane diphenyl diisocyanate. The structures of BHET and PUFs were identified by FTIR spectra. The limiting oxygen index (LOI) of the PUFs (23.27%) was higher than that of common PUFs (16-18%), because the aromatic substituent in the depolymerized products improved the flame retardance. To improve the LOI of the PUFs, dimethyl methylphosphonate doped PUFs (DMMP-PUFs) were produced. The LOI of DMMP-PUFs was approached to 27.69% with the increasing of the doped DMMP. The influences of the flame retardant on the foams density, porosity, and compression properties were studied. Furthermore, the influences of foaming agent, catalyst, and flame retardant on the flame retardation were also investigated.

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Aminolysis of Poly(Ethylene Terephthalate) Waste for Recovery of Value Added Comonomeric Product

Cited by 24 publications

References 12 publications

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

A review on thermal and catalytic pyrolysis of plastic solid waste (PSW)

Surface hydrolysis of postconsumer polyethylene terephthalate to produce adsorbents for cationic contaminants

Recycling of waste poly(ethylene terephthalate) into flame‐retardant rigid polyurethane foams

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