Kinetics of poly(ethylene terephthalate) glycolysis by diethylene glycol. Part II: Effect of temperature, catalyst and polymer morphology

Polymeric Cracking of Waste Polyethylene Terephthalate to Chemicals and Energy

“…PET recycling processes can be based on the reversibility of this condensation reaction (chemical recycling by hydrolysis or solvolysis 8 ), which results in total recycling. Numerous papers deal with this reversible reaction for PET recycling and potential techniques include different methods of hydrolysis, 9 -12 glycolysis, [13][14][15][16][17], and methanolysis. 18 -20 However, these processes demand intensive bottle cleaning: polyethylene caps, paper, binder, and residual content have to be thoroughly removed.…”

Generalized kinetic analysis of heterogeneous PET glycolysis: Nucleation-controlled depolymerization

“…For the whole range of agitation rates from low (50 rpm) to high (600 rpm), the data appear to fall into a single curve, closely matching a reaction mechanism described by second order (F2) kinetics. It is interesting to note that while glycolysis is commonly thought to be diffusion controlled [8,9,20,29], the reduced kinetic data do not show significant scatter at various agitation levels (Fig. 5c).…”

Poly (ethylene terephthalate) recycling for high value added textiles

“…In addition, extra resources for producing PET are unnecessary in the chemical recycling of PET (Achilias and Karayannidis 2004). The commercially available chemical recycling technologies contain glycolysis (Ikladious 2000;Chen et al 2001b;Pardal and Tersac 2007;Kosmidis et al 2001), hydrolysis (Carta et al 2003;Goto et al 2002;Kurokawa et al 2003;Genta et al 2007), methanolysis (Goto et al 2002;Kurokawa et al 2003;Genta et al 2007), and aminolysis (Spychaj et al 2001;Shukla and Harad 2006) reactions. The classification of chemical recycling with each reaction product is shown in Figure 5.…”

“…The oligoesters obtained from PET glycolysis can be further reacted with aliphatic diacids to form polyester polyols, which can be utilized as the starting material for polyurethane synthesis (Nikles and Farahat 2005). The PET oligoesters can be directly reacted with diisocyanate for preparation of polyurethane (Ikladious 2000;Chen et al 2001b;Pardal and Tersac 2007;Kosmidis et al 2001). Mercit (Mercit and Akar 2001) reported on the synthesis of new urethane oil from glycolysis-treated PET waste.…”