A method for the exchange of water substance isotopes between the currents of liquid water and gaseous halogenated hydrocarbon and a suitable catalytically active composition therefor

摘要

ABSTRACT OF THE DISCLOSUREHydrogen isotope (e.g. deuterium) exchange from liquid water toa gaseous halohydrocarbon (e.g. fluorform, CF3H-CF3D) is obtained atan operating temperature in the range 0 to 100°C using a catalyticallyactive mass comprising a porous anion exchange resin in the hydroxide ionform and the enriched gaseous halohydrocarbon streams is decomposed byisotope selective photo-decomposition into a first, gaseous streamenriched in the hydrogen isotope, which is removed as a product, and adepleted gaseous halohydrocarbon stress, which is recirculated forenrichment again. The catalytically active mass may, for example, be inthe form of resin particles suspended in a fluidized bed or parked asresin particles between sheets wound into a roll. One of the sheets maybe corrugated and have open interstices to form a packing in a columnwhich permits countercurrent gas and liquid flow past the resin. Pre-ferably the wound sheets are hydrophilic to retard flooding by the liquidwater. The liquid water stream may contain dimethyl sulfoxide (DMSO)added as co-solvent.