RU93045055A - METHOD FOR REMOVING SILVER FROM PHOTO MATERIALS PROCESSING WASTE - Google Patents

METHOD FOR REMOVING SILVER FROM PHOTO MATERIALS PROCESSING WASTE

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Publication number
RU93045055A
RU93045055A RU93045055/02A RU93045055A RU93045055A RU 93045055 A RU93045055 A RU 93045055A RU 93045055/02 A RU93045055/02 A RU 93045055/02A RU 93045055 A RU93045055 A RU 93045055A RU 93045055 A RU93045055 A RU 93045055A
Authority
RU
Russia
Prior art keywords
silver
precipitate
iron
solution
deposition
Prior art date
Application number
RU93045055/02A
Other languages
Russian (ru)
Other versions
RU2068012C1 (en
Inventor
К.Л. Васильев
Original Assignee
К.Л. Васильев
Filing date
Publication date
Application filed by К.Л. Васильев filed Critical К.Л. Васильев
Priority to RU93045055A priority Critical patent/RU2068012C1/en
Priority claimed from RU93045055A external-priority patent/RU2068012C1/en
Application granted granted Critical
Publication of RU2068012C1 publication Critical patent/RU2068012C1/en
Publication of RU93045055A publication Critical patent/RU93045055A/en

Links

Claims (1)

Изобретение относится к переработке вторичных источников серебра и может быть использовано для получения чистого серебра. Целью изобретения является поиск оптимального количества сульфида натрия, обеспечивающего полное осаждение серебра из отбеливающе-фиксирующего раствора при минимальном осаждении железа, а также поиск способа быстрого отделения осадка от раствора и очистки осадка от железа. Указанная цель достигается тем, что в способе, включающем осаждение сульфида серебра, согласно изобретению, процесс осаждения проводят из растворов, содержащих 40-50 г/л этилендиаминтетраацетата железа (III)-натрия, путем добавления сульфида натрия в количествах 0,948-4,54 г/л при интенсивном перемешивании в течение не менее 10 мин с последующим отделением осадка от раствора фильтрованием и промывкой осадка водой, 20%-ной серной кислотой и повторно водой.The invention relates to the processing of secondary sources of silver and can be used to produce pure silver. The aim of the invention is to find the optimal amount of sodium sulfide, which ensures the complete deposition of silver from the bleaching-fixing solution with a minimum precipitation of iron, as well as the search for a way to quickly separate the precipitate from the solution and clean the precipitate from iron. This goal is achieved by the fact that in the method comprising the deposition of silver sulfide, according to the invention, the deposition process is carried out from solutions containing 40-50 g / l of ethylene diamine tetraacetate of iron (III) sodium, by adding sodium sulfide in amounts of 0.948-4.54 g / l with vigorous stirring for at least 10 minutes, followed by separation of the precipitate from the solution by filtration and washing the precipitate with water, 20% sulfuric acid and repeatedly with water.
RU93045055A 1993-09-20 1993-09-20 Method of extracting silver from the worked out photographic solutions containing sodium thiosulfate RU2068012C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU93045055A RU2068012C1 (en) 1993-09-20 1993-09-20 Method of extracting silver from the worked out photographic solutions containing sodium thiosulfate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU93045055A RU2068012C1 (en) 1993-09-20 1993-09-20 Method of extracting silver from the worked out photographic solutions containing sodium thiosulfate

Publications (2)

Publication Number Publication Date
RU2068012C1 RU2068012C1 (en) 1996-10-20
RU93045055A true RU93045055A (en) 1996-11-20

Family

ID=20147528

Family Applications (1)

Application Number Title Priority Date Filing Date
RU93045055A RU2068012C1 (en) 1993-09-20 1993-09-20 Method of extracting silver from the worked out photographic solutions containing sodium thiosulfate

Country Status (1)

Country Link
RU (1) RU2068012C1 (en)

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