A method for processing a composite material comprising reinforcing fibres and an organic compound includes a post-processing step of oxidising the composite material. A reactor (100) is heated to a first temperature of between 300° C. and 600° C.; and oxygen is injected into the reactor, to produce an oxygen content of between 2% and 15% of a reaction volume of the reactor. Steam is injected into the reactor, the steam being superheated to a temperature of between 300° C. and 600° C. This oxidizes the organic compound into CO and/or CO2. Also disclosed is a processing device configured to implement the method and a recycled fiber obtained by the method.
C08J 11/14 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with steam or water
C08J 11/16 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with inorganic material
2.
METHOD FOR PROCESSING COMPOSITE MATERIAL WASTE, DEVICE FOR IMPLEMENTING THE METHOD AND RECYCLED FIBRE OBTAINED THEREBY
The invention relates to a method for processing a composite material comprising reinforcing fibres and an organic compound in which a post-processing step of oxidising the composite material comprises: a step of heating the reactor (100) to a first temperature of between 300°C and 600°C; a step of injecting oxygen into the reactor, which step is configured to produce an oxygen content of between 2% and 15% of a reaction volume of the reactor; a step of injecting steam into the reactor; this steam being superheated to a temperature of between 300°C and 600°C; and a step of oxidising the organic compound into CO and/or into CO2. The invention also relates to a processing device configured to implement the method and to recycled fibre obtained thereby.
C08J 11/12 - Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by dry-heat treatment only
B29B 17/02 - Separating plastics from other materials
F27B 9/04 - Furnaces through which the charge is moved mechanically, e.g. of tunnel type Similar furnaces in which the charge moves by gravity adapted for treating the charge in vacuum or special atmosphere
F27D 7/02 - Supplying steam, vapour, gases or liquids
F23G 5/12 - Methods or apparatus, e.g. incinerators, specially adapted for combustion of waste or low-grade fuels including supplementary heating using gaseous or liquid fuel
D01D 10/00 - Physical treatment of man-made filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
D01F 13/04 - Recovery of starting material, waste material or solvents during the manufacture of man-made filaments or the like of synthetic polymers
patents
