Recycling of membrane components for fuel cells and electrolysers

A method of recycling fluorinated polymer from a waste membrane, the fluorinated polymer comprising a fluorinated polymer backbone chain and a plurality of groups represented by formula - SO3Z, wherein Z is a cation, the method comprising: contacting the waste membrane with a liquid solvent to dispe...

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Bibliographische Detailangaben
Hauptverfasser:	Gareth Hart, Ross Gordon
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G BASIC ELECTRIC ELEMENTS BLASTING CHEMISTRY COMPOSITIONS BASED THEREON DRYING DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM ELECTRICITY GENERAL PROCESSES OF COMPOUNDING HEATING LIGHTING MAKING GRANULES OR PREFORMS MECHANICAL ENGINEERING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WEAPONS WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	A method of recycling fluorinated polymer from a waste membrane, the fluorinated polymer comprising a fluorinated polymer backbone chain and a plurality of groups represented by formula - SO3Z, wherein Z is a cation, the method comprising: contacting the waste membrane with a liquid solvent to disperse the waste membrane in the solvent thus forming a dispersion of the fluorinated polymer in the liquid solvent; and freeze-drying the dispersion to produce a dry solid fluorinated polymer material. Preferably the dry solid fluorinated polymer material is in a protonated acid form. The liquid solvent may be organic or aqueous solvent. The dry solid fluorinated polymer material may be dispersed in another solvent and may undergo cation exchange to convert the dry solid fluorinated polymer material to a fluorinated polymer. This new fluorinated polymer may be used to create a new membrane.