Glycolytic Aminolysis of Poly (Ethylene Terephthalate) Waste at Atmospheric Pressure for Recovery of a Value Added Insecticide

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

doi:10.1081/pte-200046109

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…Among these methods of PET recycling, chemical recycling is the most preferred method. Some of advantages of PET chemical recycling are variety of depolymerization agents and depolymerization products . The chemical recycling of waste PET can be carried out in many ways such as glycolysis, hydrolysis, alcoholysis, simultaneous hydrolysis–glycolysis, aminolysis and aminoglycolysis.…”

Section: Introductionmentioning

confidence: 99%

The effect of xylene as aromatic solvent to aminoglycolysis of post consumer PET bottles

Acar

Bal

Güçlü

2013

Polymer Engineering & Sci

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This study deals with the use of ethylene glycol and diethylamine for the aminoglycolytic degradation of waste poly(ethylene terephthalate) (PET). Our aim is to investigate how the product composition changes according to depolymerization conditions and to obtain oligomer mixtures having different properties. For this purpose, simultaneous aminolysis–glycolysis reactions of postconsumer soft‐drink PET bottles were carried out in a high pressure reactor with or without xylene. As a result, the oligomer mixtures having carboxyl, hydroxyl, and amine end groups were obtained at the end of the aminoglycolysis of PET. All products were characterized by acid value, hydroxyl value, and amine value determinations as well as by Fourier Transform Infrared Spectroscopy and Differential Scanning Calorimeter. Use of xylene has provided initially easily mixable low viscosity dispersions and depolymerization reactions proceeded more easily. It also provided water soluble and lower molecular weight oligomers with deep depolymerization of PET in the presence of xylene. In case of using xylene, glycolysis reaction was dominant reaction rather than aminolysis and hydrolysis. Functional oligomer mixtures obtained from degradation of waste PET can be used for synthesis of coating materials, such as water reducible alkyd resins and epoxy resins. POLYM. ENG. SCI., 53:2429–2438, 2013. © 2013 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

The effect of xylene as aromatic solvent to aminoglycolysis of post consumer PET bottles

Acar

Bal

Güçlü

2013

Polymer Engineering & Sci

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“…Glycolysis is a significant chemical depolymerization method and is used to obtain BHET and EG, which are used in bio-upcycling. Glycolysis is typically performed on a commercial scale and is consistently mediated by trans-esterification catalysts using EG as a solvent at a high temperature range (180-250°C), producing BHET, oligomers, and EG [ 43 , 44 ]. Glycolysis uses different types of catalysts, namely metal-based ceramics, biomass-derived materials [ 45 ], organocatalysts [ 46 ], metallic chlorides, acetates, enzymes, and eutectic solvents based on ionic liquids and metal salts [ 47 , 48 ].…”

Section: Chemical Depolymerizationmentioning

confidence: 99%

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Mudondo

Lee

Jeong

et al. 2022

J. Microbiol. Biotechnol.

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Polyethylene terephthalate (PET) is a plastic material commonly applied to beverage packaging used in everyday life. Owing to PET’s versatility and ease of use, its consumption has continuously increased, resulting in considerable waste generation. Several physical and chemical recycling processes have been developed to address this problem. Recently, biological upcycling is being actively studied and has come to be regarded as a powerful technology for overcoming the economic issues associated with conventional recycling methods. For upcycling, PET should be degraded into small molecules, such as terephthalic acid and ethylene glycol, which are utilized as substrates for bioconversion, through various degradation processes, including gasification, pyrolysis, and chemical/biological depolymerization. Furthermore, biological upcycling methods have been applied to biosynthesize value-added chemicals, such as adipic acid, muconic acid, catechol, vanillin, and glycolic acid. In this review, we introduce and discuss various degradation methods that yield substrates for bioconversion and biological upcycling processes to produce value-added biochemicals. These technologies encourage a circular economy, which reduces the amount of waste released into the environment.

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“…have made significant contributions in the studies on the kinetics and thermodynamics of aminolytic recycling of waste PET. PET waste powder on reaction with boiling EG at 470 K followed by treatment with hydrazine monohydrate (HMH) and hydroxylamine hydrochloride gives terephthalic dihydrazide (TDH) , and terephthalohydroxamic acid, , respectively. A one-step aminolysis of PET waste with HMH at 339 K also recovered TDH with significant yields .…”

Section: Chemical Recycling Of Petmentioning

confidence: 99%

Recent Developments in the Chemical Recycling of Postconsumer Poly(ethylene terephthalate) Waste

George

Kurian

2014

Ind. Eng. Chem. Res.

316

238

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Global production and consumption of poly(ethylene terephthalate) (PET) products has increased dramatically over the past few decades. World consumption of PET has exceeded 13 million tonnes, of which about 1.5 million tonnes is exclusively consumed by the packaging sector itself. However, this tremendous increase in PET consumption has resulted in the accumulation of an enormous quantity of waste, the disposal of which is complex day by day. Among different PET recycling methods, chemical recycling (chemolysis) is the most successful method to convert PET into its monomers/oligomers. This review presents in detail recent developments in the chemical recycling (glycolysis and aminolysis) of PET. The wide spectrum of depolymerizing agents used, the reaction conditions, catalysts, products of depolymerization, and their potential applications are described.

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Glycolytic Aminolysis of Poly (Ethylene Terephthalate) Waste at Atmospheric Pressure for Recovery of a Value Added Insecticide

Cited by 10 publications

References 13 publications

The effect of xylene as aromatic solvent to aminoglycolysis of post consumer PET bottles

The effect of xylene as aromatic solvent to aminoglycolysis of post consumer PET bottles

Recent Advances in the Chemobiological Upcycling of Polyethylene Terephthalate (PET) into Value-Added Chemicals

Recent Developments in the Chemical Recycling of Postconsumer Poly(ethylene terephthalate) Waste

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