Deep eutectic solvent as effective catalyst for aminolysis of polyethylene terephthalate (PET) waste
Abstract Aminolytic depolymerization of poly (ethylene terephthalate) (PET) bottle waste was carried out by diethanolamine and ethanolamine using synthesized deep eutectic solvents, choline chloride.x ZnCl2 and choline chloride.2 urea, as catalyst. The reaction parameters were optimized through variation in the time of aminolysis, catalyst concentration and the PET: amine ratio. Pure products N1,N1,N4,N4 tetrakis (2 hydroxyethyl) terephthalamide (THETA) and terephthalic acid (TPA) and bis (2 hydroxy ethylene) terephthalamide (BHETA) in yields 82, 83 and 95 respectively, were obtained. These products were characterized by FTIR spectroscopy, 1H NMR, 13C NMR spectroscopy and differential scanning calorimetry.
International Journal of Plastics Technology