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US 4,396,585 AGranted
Silver removal with halogen impregnated non-carbon adsorbents
AssigneeCalgon Carbon Corporation
InventorMichael R. Rosene
Life of this patent
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Abstract
The removal of silver from photographic and other solutions using a non-carbon halogen impregnated adsorbent is described.
Claims6
A process for removing ionic silver from a solution comprising contacting said solution with a halogen impregnated non-carbon adsorbent selected from natural zeolites, synthetic zeolites, activated alumina, activated silica Fuller's earth, bentonite clay, and hectorite clay, said adsorbent containing at least 0.1 weight percent halogen, said halogen being selected from the group consisting of iodine, bromine, chlorine or any combination of iodine, bromine and chlorine.
Dependencies are inferred from the claim text.