Chemical Recycling of PET: Methods and Products

Towards closed-loop recycling of multilayer and coloured PET plastic waste by alkaline hydrolysis

“…Within chemical recycling processes of PET, several options are possible such as hydrolysis, alcoholysis, aminolysis depending on the type of reagent used during chemical degradation. 10 There are also other techniques where e.g. pyrolysis, supercritical fluids, enzymes are used, but they are currently at an early research stage.…”

“…[15][16][17] Methanolysis is another commonly used alcoholysis method which is based on degradation of PET by using methanol at high temperatures under high pressures. 10 For instance, Loop industries (Canada) use methanolysis to depolymerize PET waste to PET resins and fibers. 18 Eastman (USA) is also currently performing feasibility tests to commercialize a methanolysis facility to recycle PET waste.…”

A novel route of synthesis, characterization of terephthalic dihydrazide from polyethylene terephthalate waste and it's application in PVC compounding as plasticizer

“…6 Very few efforts have been made in carrying out the degradation of PET waste at ambient temperature and pressure condition. 7 In the present attempt the aminolysis of PET waste with different amine like hydrazine monohydrate has been studied. PET solvolysis end product may be used in epoxy resin, polyurethane resin etc.…”

Optimization of reaction parameters in the conversion of PET to produce BHET

“…Numerous studies have been carried out with the goal of converting them into raw materials for other processes, after being discarded. In the case of PET, there are several chemical conversion ways for chemical recycling: hydrolysis, alcoholysis, acidolysis, aminolysis, methanolysis, and glycolysis . The products obtained by each way are: terephthalates, esters, acids, amides, dimethyl terephthalates and bis(2‐Hydroxyethyl) terephthalates, respectively.…”