Catalysts and Method for Producing Recycled Polyester

Abstract

The invention relates to the production of heterogeneous catalysts of mixed oxides based on niobium and mixed oxides of zinc, manganese, nickel, cobalt and/or aluminum, from hydrotalcites (HTs), as the precursor phase of heterogeneous catalysts, and to the application thereof in the chemical recycling of poly(ethylene terephthalate) (PET) for the production of metal-free bis(hydroxy)ethylene (BHET) monomers and oligomers with a process performance similar to that of the system in homogeneous catalysis.