METHOD FOR RECOVERING SILVER

PURPOSE:To recover economically and efficiently silver from waste liquor contg. a silver salt by adjusting the waste liquor to a specified pH, adding a small amount of an alkali metallic hydridoaluminate, and carrying out solid-liq. separation. CONSTITUTION:Waste liquor contg. a silver salt such as...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAKAWA ISAO, OHASHI HITOSHI, FUJIWARA SAIJIRO, HARADA KOICHI, TAKASUGI TAKESHI, KIYOTA TOYOAKI
Format:	Patent
Sprache:	eng
Schlagworte:	AUXILIARY PROCESSES IN PHOTOGRAPHY CHEMISTRY CINEMATOGRAPHY ELECTROGRAPHY FERROUS OR NON-FERROUS ALLOYS HOLOGRAPHY METALLURGY PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS PRETREATMENT OF RAW MATERIALS PRODUCTION AND REFINING OF METALS TREATMENT OF ALLOYS OR NON-FERROUS METALS TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Beschreibung
Zusammenfassung:	PURPOSE:To recover economically and efficiently silver from waste liquor contg. a silver salt by adjusting the waste liquor to a specified pH, adding a small amount of an alkali metallic hydridoaluminate, and carrying out solid-liq. separation. CONSTITUTION:Waste liquor contg. a silver salt such as a spent photographic fixing soln. is adjusted to 4-=about 30min to carry out reduction treatment. After finishing reduction, precipitated silver is recovered by solid-liq. separation.