Abstract
The development of chemical recycling of waste plastics by decomposition reactions in sub- and supercritical fluids is reviewed. Decomposition reactions proceed rapidly and selectively using supercritical fluids compared to conventional processes. Condensation polymerization plastics are relatively easily depolymerized to their monomers in supercritical water or alcohols. Crosslinked polymer can be recycled by selective decrosslinking. Fiber reinforced plastics can also be recycled by depolymerization of resin part. Pilot scale or commercial scale plants have been developed and are operating with sub- and supercritical fluids.
