Efficient Fe3O4 nanoparticle catalysts for depolymerization of polyethylene terephthalate

Polyethylene terephthalate (PET) can be recovered as high-purity bis(2-hydroxyethyl terephthalate) (BHET) monomer by glycolysis in the presence of Fe 3 O 4 nanoparticles (NPs). After removing metallic impurities, BHET can be used to producing r -PET.