ECSP900678A - SILVER RECOVERY OF SPENT SILVER PHOTOGRAPHIC SOLUTIONS - Google Patents
SILVER RECOVERY OF SPENT SILVER PHOTOGRAPHIC SOLUTIONSInfo
- Publication number
- ECSP900678A ECSP900678A ECSP900678A ECSP900678A EC SP900678 A ECSP900678 A EC SP900678A EC SP900678 A ECSP900678 A EC SP900678A EC SP900678 A ECSP900678 A EC SP900678A
- Authority
- EC
- Ecuador
- Prior art keywords
- silver
- solution
- spent
- recovery
- thiosulfate
- Prior art date
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title abstract 5
- 229910052709 silver Inorganic materials 0.000 title abstract 5
- 239000004332 silver Substances 0.000 title abstract 5
- 238000011084 recovery Methods 0.000 title 1
- 229910052946 acanthite Inorganic materials 0.000 abstract 3
- XUARKZBEFFVFRG-UHFFFAOYSA-N silver sulfide Chemical compound [S-2].[Ag+].[Ag+] XUARKZBEFFVFRG-UHFFFAOYSA-N 0.000 abstract 3
- 229940056910 silver sulfide Drugs 0.000 abstract 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract 2
- 239000000834 fixative Substances 0.000 abstract 2
- RWSOTUBLDIXVET-UHFFFAOYSA-M hydrosulfide Chemical compound [SH-] RWSOTUBLDIXVET-UHFFFAOYSA-M 0.000 abstract 2
- 239000002244 precipitate Substances 0.000 abstract 2
- DHCDFWKWKRSZHF-UHFFFAOYSA-N sulfurothioic S-acid Chemical compound OS(O)(=O)=S DHCDFWKWKRSZHF-UHFFFAOYSA-N 0.000 abstract 2
- 150000002500 ions Chemical class 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
Landscapes
- Removal Of Specific Substances (AREA)
Abstract
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ECSP900678 ECSP900678A (en) | 1990-09-28 | 1990-09-28 | SILVER RECOVERY OF SPENT SILVER PHOTOGRAPHIC SOLUTIONS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ECSP900678 ECSP900678A (en) | 1990-09-28 | 1990-09-28 | SILVER RECOVERY OF SPENT SILVER PHOTOGRAPHIC SOLUTIONS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| ECSP900678A true ECSP900678A (en) | 1991-07-30 |
Family
ID=42045635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ECSP900678 ECSP900678A (en) | 1990-09-28 | 1990-09-28 | SILVER RECOVERY OF SPENT SILVER PHOTOGRAPHIC SOLUTIONS |
Country Status (1)
| Country | Link |
|---|---|
| EC (1) | ECSP900678A (en) |
-
1990
- 1990-09-28 EC ECSP900678 patent/ECSP900678A/en unknown
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AR008854A1 (en) | PROCEDURE FOR THE PROCESSING OF MINES AND USEFUL COMPOSITION TO CARRY OUT SUCH PROCEDURE | |
| SE8001720L (en) | PROCEDURE FOR CLEANING WASTE WATER DISPOSAL FROM HEAVY METALS | |
| PE27991A1 (en) | RECOVERY OF PRECIOUS METALS | |
| ES501038A0 (en) | A METHOD TO IMPROVE THE RECOVERY OF VALIO-SAS AMOUNTS OF SODIUM CARBONATE FROM AN AQUEOUS SODIUM CARBONATE SOLUTION CONTAINING SODIUM CHLORIDE | |
| JPS5395629A (en) | High contrast silver image formation method | |
| FR2289449A1 (en) | MONEY RECOVERY FROM SOLUTIONS CONTAINING SILVER SUCH AS WASTE WATER AND EXTRACTS FROM HYDROMETALLURGIC INDUSTRIES | |
| DK149553C (en) | PROCEDURE FOR RECOVERING USED PAPER | |
| BE859758A (en) | PROCESS FOR RECOVERING COPPER AND SILVER FROM ORES OR SULPHIDE CONCENTRATES | |
| DK90683D0 (en) | PROCEDURE FOR THE EXTRACTION OF INSULIN FROM AN INSULIN PROTAMIN COMPLEX | |
| GB1337346A (en) | Photographic colour development process | |
| ECSP900678A (en) | SILVER RECOVERY OF SPENT SILVER PHOTOGRAPHIC SOLUTIONS | |
| ZA825879B (en) | Electrochemical developing process for reproduction layers | |
| JPS5395628A (en) | High contrast silver image formation method | |
| OA06181A (en) | Non-polluting treatment of alkaline uranium effluents containing SO4 = ions. | |
| ES8500189A1 (en) | PROCEDURE FOR THE SELECTIVE DISSOLUTION OF LEAD REGARDING ZINC AND NO COPPER | |
| BR0201029A (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 | |
| PE791A1 (en) | SILVER RECOVERY FROM USED PHOTOGRAPHIC SOLUTIONS | |
| KR850001222A (en) | Recovery method of arylborane | |
| SE9301161L (en) | Process for treating process water | |
| TH9139A (en) | Separation of silver from a solution to wash used photographic film. | |
| GB2019375A (en) | A process for the recovery of silver | |
| JPS55155354A (en) | Bleach-fixing method for color photographic material | |
| FR2328222A1 (en) | Silver recovery from used or waste photographic material - by bleaching and absorption in fixing soln., avoids incineration | |
| MX9200053A (en) | PROCESS FOR THE DIRECT OBTAINING OF SULPHATE FROM; ANHYDROUS SODIUM. | |
| JPS55161035A (en) | Silver recovering method for bleach-fix bath |