MD3037G2 - Procedeu de extragere a argintului din materiale fotografice uzate - Google Patents
Procedeu de extragere a argintului din materiale fotografice uzate Download PDFInfo
- Publication number
- MD3037G2 MD3037G2 MDA20040271A MD20040271A MD3037G2 MD 3037 G2 MD3037 G2 MD 3037G2 MD A20040271 A MDA20040271 A MD A20040271A MD 20040271 A MD20040271 A MD 20040271A MD 3037 G2 MD3037 G2 MD 3037G2
- Authority
- MD
- Moldova
- Prior art keywords
- silver
- sulphate
- electrolyte
- dissolution
- sodium
- Prior art date
Links
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 title abstract 4
- 239000000463 material Substances 0.000 title abstract 4
- 229910052709 silver Inorganic materials 0.000 title abstract 4
- 239000004332 silver Substances 0.000 title abstract 4
- 238000000034 method Methods 0.000 title abstract 3
- 238000000605 extraction Methods 0.000 title abstract 2
- 239000003792 electrolyte Substances 0.000 abstract 4
- 238000004090 dissolution Methods 0.000 abstract 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 abstract 2
- 229910021607 Silver chloride Inorganic materials 0.000 abstract 2
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 abstract 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 abstract 2
- JKNZUZCGFROMAZ-UHFFFAOYSA-L [Ag+2].[O-]S([O-])(=O)=O Chemical compound [Ag+2].[O-]S([O-])(=O)=O JKNZUZCGFROMAZ-UHFFFAOYSA-L 0.000 abstract 2
- 238000009835 boiling Methods 0.000 abstract 2
- BWHMMNNQKKPAPP-UHFFFAOYSA-L potassium carbonate Chemical compound [K+].[K+].[O-]C([O-])=O BWHMMNNQKKPAPP-UHFFFAOYSA-L 0.000 abstract 2
- 239000013049 sediment Substances 0.000 abstract 2
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 abstract 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 239000005708 Sodium hypochlorite Substances 0.000 abstract 1
- 239000004133 Sodium thiosulphate Substances 0.000 abstract 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 abstract 1
- 239000001166 ammonium sulphate Substances 0.000 abstract 1
- 235000011130 ammonium sulphate Nutrition 0.000 abstract 1
- 239000003637 basic solution Substances 0.000 abstract 1
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 230000003993 interaction Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 229910000027 potassium carbonate Inorganic materials 0.000 abstract 1
- 239000000276 potassium ferrocyanide Substances 0.000 abstract 1
- 239000011780 sodium chloride Substances 0.000 abstract 1
- SUKJFIGYRHOWBL-UHFFFAOYSA-N sodium hypochlorite Chemical compound [Na+].Cl[O-] SUKJFIGYRHOWBL-UHFFFAOYSA-N 0.000 abstract 1
- 229910052938 sodium sulfate Inorganic materials 0.000 abstract 1
- 235000011152 sodium sulphate Nutrition 0.000 abstract 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 abstract 1
- 235000019345 sodium thiosulphate Nutrition 0.000 abstract 1
- XOGGUFAVLNCTRS-UHFFFAOYSA-N tetrapotassium;iron(2+);hexacyanide Chemical compound [K+].[K+].[K+].[K+].[Fe+2].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-].N#[C-] XOGGUFAVLNCTRS-UHFFFAOYSA-N 0.000 abstract 1
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
Invenţia se referă la un procedeu de extragere a argintului din materialele fotografice uzate şi poate fi utilizată în industria, care foloseşte materiale ce conţin argint.Esenţa invenţiei constă în faptul că procedeul include tratarea materialelor fotografice uzate cu soluţie bazică de hipoclorit de sodiu 20...40% la temperatura de 30...50ºC, dizolvarea sedimentului obţinut cu amestec de peroxid de hidrogen 30...40% şi acid azotic concentrat într-un raport volumic de (2...3):1, respectiv, interacţiunea cu clorură de sodiu sau cu sulfat de amoniu cu formarea sedimentului de clorură de argint sau de sulfat de argint şi reducerea electrochimică ulterioară a argintului.Reducerea electrochimică a argintului se efectuează din electrolitul, care se obţine la dizolvarea clorurii de argint cu hexacianoferat de potasiu, la fierbere în mediu bazic, cu introducerea suplimentară în electrolit a carbonatului de potasiu, în următorul raport al componenţilor, g/l:clorură de argint 10...20hexacianoferat de potasiu 30...50carbonat de potasiu 20...30,la temperatura de 20...30ºC şi densitatea catodică a curentului de 1...1,5 Α/dm2, sau din electrolitul, care se obţine la dizolvarea la fierbere a sulfatului de argint cu tiosulfat de sodiu, cu introducerea suplimentară în electrolit a sulfatului de sodiu, în următorul raport al componenţilor, g/l:sulfat de argint 30...40tiosulfat de sodiu 300...400sulfat de sodiu 20...30,la temperatura de 20...30ºC pe electrozi poroşi în flux cu viteza de 3...5 m/min şi densitatea catodică a curentului de 100...150 A/dm2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20040271A MD3037G2 (ro) | 2004-11-15 | 2004-11-15 | Procedeu de extragere a argintului din materiale fotografice uzate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20040271A MD3037G2 (ro) | 2004-11-15 | 2004-11-15 | Procedeu de extragere a argintului din materiale fotografice uzate |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MD3037F1 MD3037F1 (ro) | 2006-04-30 |
| MD3037G2 true MD3037G2 (ro) | 2006-12-31 |
Family
ID=36202598
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MDA20040271A MD3037G2 (ro) | 2004-11-15 | 2004-11-15 | Procedeu de extragere a argintului din materiale fotografice uzate |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD3037G2 (ro) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1699949A1 (ru) * | 1989-11-28 | 1991-12-23 | Нижнекамское производственное объединение "Нижнекамскнефтехим" | Способ извлечени серебра из сточных вод |
| MD791G2 (ro) * | 1996-01-30 | 1998-05-31 | Государственный Университет Молд0 | Procedeu de extragere a argintului din materiale fotosensibile |
-
2004
- 2004-11-15 MD MDA20040271A patent/MD3037G2/ro not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1699949A1 (ru) * | 1989-11-28 | 1991-12-23 | Нижнекамское производственное объединение "Нижнекамскнефтехим" | Способ извлечени серебра из сточных вод |
| MD791G2 (ro) * | 1996-01-30 | 1998-05-31 | Государственный Университет Молд0 | Procedeu de extragere a argintului din materiale fotosensibile |
Also Published As
| Publication number | Publication date |
|---|---|
| MD3037F1 (ro) | 2006-04-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG4A | Patent for invention issued | ||
| KA4A | Patent for invention lapsed due to non-payment of fees (with right of restoration) | ||
| MM4A | Patent for invention definitely lapsed due to non-payment of fees |