Kinetics of alcoholysis of poly(ethylene terephthalate) in sub- and super-critical isooctyl alcohol to produce dioctyl terephthalate

Ding, Jun‐Ying; Chen, Jinyang; Ji, Yimei; Ni, Pei; Li, Zhilian; Lin, Xiaodong

doi:10.1016/j.jaap.2014.01.005

Cited by 15 publications

(7 citation statements)

References 22 publications

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“…29 Ding et al focused on the alcoholysis kinetics of PET both in sub-and super-critical 2-EH to recycle DOTP with a batch reactor under the varying temperature ranging from 533 to 653 K. It was concluded that on the basis of the quick decomposition of DOTP to terephthalic acid (TPA) in the supercritical 2-EH, the decomposition needs to be taken into account for the kinetics of the DOTP yielding; however, in the subcritical 2-EH on the basis of slow decomposition of DOTP, its role in kinetics could be ignored. 30 S C H E M E 2 Polymer recycling approaches 12 [Colour figure can be viewed at wileyonlinelibrary.com]…”

Section: Alcoholysis Methods Of Pet Recyclingmentioning

confidence: 99%

“…The results revealed that owing to the quick decomposition of PET in supercritical 2‐EH at a temperature of 613 K, the preferred temperature was sub‐critical 2‐EH of 573 K. It is reported that the efficiency of depolymerization to obtain DOTP was 97% at a temperature of sub‐critical 2‐EH, a reaction time of 3 hours, and the 2‐EH/PET ratio of 4 29 . Ding et al focused on the alcoholysis kinetics of PET both in sub‐ and super‐critical 2‐EH to recycle DOTP with a batch reactor under the varying temperature ranging from 533 to 653 K. It was concluded that on the basis of the quick decomposition of DOTP to terephthalic acid (TPA) in the super‐critical 2‐EH, the decomposition needs to be taken into account for the kinetics of the DOTP yielding; however, in the subcritical 2‐EH on the basis of slow decomposition of DOTP, its role in kinetics could be ignored 30 …”

Section: Chemical Recycling Of Petmentioning

confidence: 99%

See 1 more Smart Citation

Chemical recycling ofPET: A stepping‐stone toward sustainability

Shojaei

Abtahi

Najafi

2020

Polymers for Advanced Techs

168

113

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This paper focuses explicitly on the chemical approaches involved in the recycling of polyethylene terephthalate (PET). Due to the high rate of consumption as well as nonbiodegradability, PET plays a crucial role as one of the most significant sources of accumulated waste in the landfill which jeopardizes our planet. To address this issue as well as increased environmentally conscious, running out of landfill space, natural resource, and energy conservation, and producing value-added chemicals to use as building block or co-products, the chemical recycling methods have been evolved. Therefore, there has been an attempt to have a comprehensive review of the five types of conventional recycling methods namely hydrolysis, methanolysis, glycolysis, aminolysis, and ammonolysis studied by researchers over the last two decades. In this regard, the influence of diverse depolymerization reaction variables for instance, traditional catalyst, temperature profile, ionic liquid catalysts, phase transfer catalyst, microwave assistance, etc was reported. Moreover, the upsides and downsides of each technique were considered.

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Section: Alcoholysis Methods Of Pet Recyclingmentioning

confidence: 99%

Section: Chemical Recycling Of Petmentioning

confidence: 99%

Chemical recycling ofPET: A stepping‐stone toward sustainability

Shojaei

Abtahi

Najafi

2020

Polymers for Advanced Techs

168

113

View full text Add to dashboard Cite

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“…On the other hand, the decomposition of DOTP was fast in the super-critical 2-EH medium and the apparent activation energy was calculated as 30.29 kJ/mol. Moreover, it was observed that the batch-type reactor was suitable for subcritical proses while for the super-critical process, a continuous flow reactor was a preferable reactor [53]. In the studies carried out so far, different synthesis conditions such as different catalyst, solvent, temperature, time, purification have been investigated rather than creating different methods.…”

Section: Properties Valuesmentioning

confidence: 99%

A mini-review on different synthesis reactions of dioctyl terephthalate (DOTP) and properties of DOTP plasticized PVC

Altun¹,

Fellah²

2022

Pamukkale J Eng Sci

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PVC is one of the commonly preferred thermoplastics. Plasticizing additives or plasticizers are added to break interstrand-dipole interaction in PVC and soften PVC in general. Plasticizers have many applications such as electrical connectors, vinyl floorings, vinyl water stops, toys, bottle caps, and medical devices. Although a great majority of plasticizers are phthalates that harm to environment, Dioctyl terephthalate (DOTP) is known as a non-phthalate plasticizer. DOTP, one of the plasticizers preferred in the industry, is an aromatic terephthalate. There are two main production methods of DOTP; direct esterification and transesterification. In this review, different synthesis reactions of DOTP plasticizer were summarized. Studies have generally focused on different catalysts, solvents, reactant ratios, and reaction conditions such as temperature, pressure, and reaction time in literature. Synthesizing DOTP from scrap PET products is an environmentally friendly manufacturing method. Besides, properties of DOTP plasticized PVC, mainly migration, mechanical and thermal properties, have been reviewed. According to the results, DOTP has high compatibility with PVC, and DOTP plasticized PVC shows good migration, mechanical and thermal properties. DOTP is a promising plasticizer due to having good properties, low production cost, and low toxicity. PVC, yaygın olarak tercih edilen termoplastiklerden biridir. Plastikleştirici katkı maddeleri veya plastikleştiriciler, PVC'de dipol bağlar arası etkileşimi kırmak ve genel olarak PVC'yi yumuşatmak için kullanılmaktadır. Plastikleştiricilerin elektrik konektörleri, vinil zemin kaplamaları, vinil su tutucuları, oyuncaklar, şişe kapakları, medikal cihazlar gibi pek çok uygulaması bulunmaktadır. Plastikleştiricilerin büyük çoğunluğunu çevreye zararlı ftalatlar oluştursa da, Dioctyl tereftalat (DOTP), ftalat içermeyen bir plastikleştirici olarak bilinir. Endüstride tercih edilen plastikleştiricilerden biri olan DOTP, aromatik bir tereftalattır. DOTP'nin doğrudan esterleştirme vetransesterleşme olmak üzere iki ana üretim yöntemi bulunmaktadır. Bu derlemede, DOTP plastikleştiricinin farklı sentez reaksiyonları özetlenmiştir. Literatürde, çalışmalar genellikle farklı katalizör, çözücü, reaktan oranları ve sıcaklık, basınç, reaksiyon süresi gibi reaksiyon koşullarına odaklanmaktadır. Atık PET ürünlerinden DOTP sentezlemek çevre dostu bir üretim yöntemidir. Ayrıca, başlıca migrasyon, mekanik ve termal özellikleri olmak üzere DOTP ile plastikleştirilmiş PVC'nin özellikleri ele alınmıştır. Sonuçlara göre, DOTP, PVC ile yüksek uyumluluğa sahiptir ve DOTP ile Plastikleştirilmiş PVC iyi migrasyon, mekanik ve termal özellikler sergilemektedir. DOTP, iyi özelliklere, düşük üretim maliyetine ve düşük toksisiteye sahip olmasından dolayı gelecek vaat eden bir plastikleştiricidir.

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“…6 The chemical depolymerization of PET is extremely tough without supercritical conditions or catalysts. 7,8 Therefore, researchers have developed various kinds of homogeneous and heterogeneous catalysts, such as metal (Zn, Co, Mn, etc.) acetates, ionic liquids, zeolites, and metal oxides.…”

Section: ■ Introductionmentioning

confidence: 99%

“…The chemical depolymerization of PET is extremely tough without supercritical conditions or catalysts. , Therefore, researchers have developed various kinds of homogeneous and heterogeneous catalysts, such as metal (Zn, Co, Mn, etc.) acetates, ionic liquids, zeolites, and metal oxides. − Homogeneous catalysts residuals left in monomers may affect the quality of the final products, while heterogeneous catalysts rapidly evolved and have dominated the research landscape because they can be separated from the product easily and reused several times .…”

Section: Introductionmentioning

confidence: 99%

Ultrasmall CeO₂ Nanoparticles with Rich Oxygen Defects as Novel Catalysts for Efficient Glycolysis of Polyethylene Terephthalate

Yun

Shen

et al. 2022

ACS Sustainable Chem. Eng.

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Chemical recycling of polyethylene terephthalate (PET) attracts increasing attention worldwide since it is a sustainable way to tackle the escalating plastic waste problem and create a circular plastic economy. Herein, defect-rich CeO 2 nanoparticles (NPs) with tunable sizes and shapes were conveniently synthesized by one-step precipitation with KH550 modification and first used as novel catalysts for the glycolysis of PET. Among the obtained CeO 2 catalysts, CeO 2 −2.7 nm NPs possessed the best performance for depolymerization at 196 °C, completing the reaction in 15 min with a PET conversion of 98.6% and a monomer yield of 90.3%. The glycolysis mechanism study reveals the relationship between defect engineering and catalytic activity. An ultrasmall size of 2.7 nm minimizes oxygen defect formation energy of CeO 2 NPs and increases the dispersity in ethylene glycol (EG). Rich oxygen defects on CeO 2 nanoparticles accelerate the glycolysis reaction evidently via inducing the generation of Ce 3+ and providing sites for the adsorption and activation. This work provides the application prospect of defective heterogeneous catalysts in the depolymerization reaction under low energy consumption.

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Kinetics of alcoholysis of poly(ethylene terephthalate) in sub- and super-critical isooctyl alcohol to produce dioctyl terephthalate

Cited by 15 publications

References 22 publications

Chemical recycling ofPET: A stepping‐stone toward sustainability

Chemical recycling ofPET: A stepping‐stone toward sustainability

A mini-review on different synthesis reactions of dioctyl terephthalate (DOTP) and properties of DOTP plasticized PVC

Ultrasmall CeO₂ Nanoparticles with Rich Oxygen Defects as Novel Catalysts for Efficient Glycolysis of Polyethylene Terephthalate

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Kinetics of alcoholysis of poly(ethylene terephthalate) in sub- and super-critical isooctyl alcohol to produce dioctyl terephthalate

Cited by 15 publications

References 22 publications

Chemical recycling ofPET: A stepping‐stone toward sustainability

Chemical recycling ofPET: A stepping‐stone toward sustainability

A mini-review on different synthesis reactions of dioctyl terephthalate (DOTP) and properties of DOTP plasticized PVC

Ultrasmall CeO2 Nanoparticles with Rich Oxygen Defects as Novel Catalysts for Efficient Glycolysis of Polyethylene Terephthalate

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Product

Resources

About

Ultrasmall CeO₂ Nanoparticles with Rich Oxygen Defects as Novel Catalysts for Efficient Glycolysis of Polyethylene Terephthalate