Alkali Depolymerization of Poly(ethylene terephthalate) in a Quasi-solid-solid Kneading Reaction

被引：5

作者：

Biermann, Lars ^{[1
,2
]}

Quast, David ^{[1
]}

Brepohl, Esther ^{[1
]}

Eichert, Carsten ^{[2
]}

Scholl, Stephan ^{[1
]}

机构：

[1] Tech Univ Carolo Wilhelmina Braunschweig, Inst Chem & Thermal Proc Engn ICTV, Langer Kamp 7, D-38106 Braunschweig, Germany

[2] RITTEC Umwelttech GmbH, Feldstr 29, D-21335 Luneburg, Germany

来源：

CHEMICAL ENGINEERING & TECHNOLOGY | 2021年 / 44卷 / 12期

关键词：

Alkali hydrolysis; Chemical recycling; Circular economy; Depolymerization; Poly(ethylene terephthalate) waste; POLYETHYLENE TEREPHTHALATE; SULFURIC-ACID; BATCH MIXER; PET; WASTE; HYDROLYSIS; KINETICS; DEGRADATION; SIMULATION; CATALYST;

D O I：

10.1002/ceat.202100327

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The alkaline depolymerization reaction of poly(ethylene terephthalate) (PET) under quasi-solvent-free conditions was investigated. This is a new approach for recycling PET waste to its monomer building blocks: terephthalic acid and ethylene glycol. The influence of base particle size, reaction temperature, and rotational speed of the employed laboratory kneader on terephthalic acid yield in the quasi-solid-solid reaction was investigated. PET is depolymerized almost quantitatively in a reaction time of 5 min at moderate reaction temperatures, with intense mixing affecting the yield of terephthalic acid. The quality of the terephthalic acid monomer, assessed by color index measurements, indicated that the reaction temperature primarily influences the color index of the monomer. By balancing terephthalic acid yield versus color index, optimum reaction conditions were proposed.

引用

页码：2300 / 2308

页数：9

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