Innovative upcycling of polyesters and polycarbonates via manganese-catalyzed hydrogenolysis

This study introduces a manganese-based pincer catalyst that efficiently hydrogenolysis polyesters and polycarbonates into valuable diols under mild conditions. The phosphine-free catalyst demonstrates high activity and selectivity, achieving excellent yields for PET, PBT, PCL, PLA, and PC. • Manganese-based pincer catalyst achieves high yields in polyester and polycarbonate hydrogenolysis under mild conditions. • Method effectively recycles diverse commercial and post-consumer plastics, showcasing the potential for industrial scalability. • Converts plastic waste into valuable chemicals, addressing pollution and promoting a circular economy. Plastic pollution has become the second most significant environmental issue globally, following climate change. Traditional plastic recycling methods, such as mechanical and chemical recycling, suffer from low efficiency and significant ecological impacts. This study introduces a novel approach to the hydrogenolysis of polyesters and polycarbonates using a phosphine-free manganese-based pincer catalyst, achieving the efficient conversion of various plastics into valuable chemicals under mild conditions at lower temperatures and pressures. Experimental results demonstrate excellent catalytic activity and selectivity for transforming PET, PBT, PCL, PLA, and PC. Furthermore, the method has been successfully applied to the recycling of various commercial and post-consumer polyester and polycarbonate plastics, showcasing its potential for practical applications. This study not only provides a new perspective on plastic waste management but also offers important technical support for developing a circular economy.