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Se refiere a un proceso para recuperar sulfuro de plata a partir de soluciones fijadoras fotográficas que contengan plata: y que consiste en: "utilizar un reactivo de hidrosulfuro para producir iones que se añadirán a una solución fijadora usada, para precipitar sulfuro de plata no soluble. El precipitado resultante se aisla de la solución fijadora usada, con lo que se extrae suficiente plata de la misma y se regenera suficiente tiosulfato para permitir el reciclaje de la solución. Como reactivo de hidrosulfuro se emplea de preferencia hidrosulfuro de sodio, potasio o amonio. El reactivo de hidrosulfuro precipita plata en forma de sulfuro de plata, en tanto mantiene constantes los niveles de pH y tiosulfato en el fijador para permitir su reutilización.Refers to a process for recovering silver sulfide from silver-containing photographic fixer solutions: consisting of: "using a hydrosulfide reagent to produce ions to be added to a used fixer solution, to precipitate non-soluble silver sulfide The resulting precipitate is isolated from the used fixative solution, whereby enough silver is extracted from it and enough thiosulfate is regenerated to allow recycling of the solution. The hydrosulfide reagent precipitates silver in the form of silver sulfide, while maintaining constant levels of pH and thiosulfate in the fixative to allow its reuse.
ECSP9006781990-09-281990-09-28
SILVER RECOVERY OF SPENT SILVER PHOTOGRAPHIC SOLUTIONS
ECSP900678A
(en)
Photo Finishing Solution Supply Cartridge, Processing System, Silver Removal Method of Photo Finishing Processing Solution, Containers for Photographic Processing Solution and Solution for a Photoprocessing Machine, and Photographic Media Processing Methods and photographic processing solution supply to a processor