Glycolysis of poly(ethylene terephthalate) (PET) using basic ionic liquids as catalysts

Recent Developments in the Chemical Recycling of PET

“…Recently, they successfully applied Fecontaining magnetic ionic liquid as a catalyst for PET glycolysis. They reported that this catalyst has better catalytic activity than the conventional metal salts or the pure ionic liquid with the amount of catalyst affecting the PET conversion and BHET selectivity (Wang et al, 2010 They attained 100 % PET conversion with 71.2% BHET yield by performing the glycolysis at 190 ⁰C for 2 hours with EG/PET molar ratio of 10 and catalyst/PET weight ratio of 0.05 (Yue et al, 2011). As can be deduced in this study, the recoverability and reusability of ionic liquid catalyst permits the use of higher amount of catalyst.…”

Recovery of Terephthalic Acid by employing magnetic nanoparticles as a solid support

“…Chemical depolymerization of PET complex was done by Liu et al [10] . Waste depolymerization of PET was done by using bransted acidic ionic liquid under microwave irradiation [11] and in another report PET was glycolized by using several ionic liquids and basic ionic liquids as catalysts [12] . In addition the efficiency of Metal-Containing Ionic Liquids as a highly Effective Catalysts for Degradation of Poly (Ethylene Terephthalate) has been surveyed [13] .…”

Titanate Nanotubes as New Nanostrutured Catalyst for Depolymerization of PET by Glycolysis Reaction

“…Chemical recycling by glycolysis is one of de most used recycling types. It can be described as a depolymerization process by transesterification between PET ester groups and a diol (generally ethylene glycol, EG) 4,5 , allowing obtaining of bis(hydroxyethyl) terephthalate (BHET) 6 as main depolymerization product ( Figure 1). This reaction depends on some variables such as temperature, molar ratio EG/PET, glycolysis time and amount of catalyst 3 .…”