PL146473B1 - Method of recovering silver from silver-plated glass wastes - Google Patents
Method of recovering silver from silver-plated glass wastes Download PDFInfo
- Publication number
- PL146473B1 PL146473B1 PL25930886A PL25930886A PL146473B1 PL 146473 B1 PL146473 B1 PL 146473B1 PL 25930886 A PL25930886 A PL 25930886A PL 25930886 A PL25930886 A PL 25930886A PL 146473 B1 PL146473 B1 PL 146473B1
- Authority
- PL
- Poland
- Prior art keywords
- silver
- plated glass
- recovering
- solution
- scrap
- Prior art date
Links
- 229910052709 silver Inorganic materials 0.000 title claims description 25
- 239000004332 silver Substances 0.000 title claims description 24
- 238000000034 method Methods 0.000 title claims description 8
- 239000010922 glass waste Substances 0.000 title 1
- 239000000243 solution Substances 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 7
- 239000002253 acid Substances 0.000 claims description 5
- 235000011149 sulphuric acid Nutrition 0.000 claims description 4
- 239000007864 aqueous solution Substances 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 235000021110 pickles Nutrition 0.000 claims description 2
- 238000007639 printing Methods 0.000 claims description 2
- 239000012286 potassium permanganate Substances 0.000 claims 1
- 238000000926 separation method Methods 0.000 claims 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 20
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 3
- 229910021607 Silver chloride Inorganic materials 0.000 description 3
- 230000029087 digestion Effects 0.000 description 3
- 229910017604 nitric acid Inorganic materials 0.000 description 3
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- LFZAXBDWELNSEE-UHFFFAOYSA-N [S].[K] Chemical compound [S].[K] LFZAXBDWELNSEE-UHFFFAOYSA-N 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 239000011260 aqueous acid Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007844 bleaching agent Substances 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000001079 digestive effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 150000003378 silver Chemical class 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Surface Treatment Of Glass (AREA)
Description
Przedmiotem wynalazku jest sposób odzyskiwania srebra ze zlomu posrebrzanego szkla.Dotychczas ten srebronosny surowiec wtórny nie jest przerabiany ze wzgledu na brak odpowiedniej technologii odzyskiwania srebra.Znany z literatury sposób odzyskiwania srebra z posrebrzanego szkla polega na roztwarzaniu srebra w kwasie azotowym. Trudne warunki pracy, duze zuzycie kwasu azotowego, klopotliwa utylizacja kwasnych roztworów potrawiennych, ograniczaja mozliwosci stosowania znanego sposobu.Sposób wedlug wynalazku polega na tym, ze srebro rozpuszcza sie w wodnym roztworze kwasu siarkowego o stezeniu 1 -10% w obecnosci substancji utleniajacej KMnC4, w ilosci 0,1-1%.Z roztworu potrawiennego wydziela sie chlorek srebra, który oddziela sie od roztworu i przerabia na srebro metaliczne znanym sposobem na przyklad przez kupelacje.Wedlug wynalazku zlom posrebrzanego szkla umieszczony w pojemnikach kwasoodpornych traktuje sie roztworem wodnym o stezeniu 1 - 5% H2SO4 i 0,1 - 0,5% substancji utleniajacej KMn04. Proces roztwarzania srebra prowadzony w temperaturze okolo 20°C trwa 5-20 minut.Roztwór potrawienny moze byc wielokrotnie stosowany do roztwarzania srebra, co prowadzi do oszczednosci reagentów i wyzszych stezen srebra w roztworze potrawiennym.W sposobie odzyskiwania srebra wedlug wynalazku zaskakujace jest roztwarzanie sie srebra naniesionego na szklo w bardzo rozcienczonych roztworach. Z literatury technicznej wiadomo, ze srebro roztwarza sie w kwasie azotowym i we wrzacym stezonym kwasie siarkowym, a roztwarza¬ nie srebra w wodzie królewskiej jest utrudnione tworzeniem sie AgCl na powierzchni srebra. Do roztwarzania srebra ze zlomu posrebrzanego szkla moze byc tez stosowany zuzyty odbielacz fotograficzny, zawierajacy kwas, utleniacz i rozpuszczalne sole srebra.Przyklad . 0,5 kg zlomu posrebrzanego szkla o zawartosci 0,05 - 0,2% Ag umieszczono w perforowanym pojemniku polietylenowym i zanurzono do naczynia z 1 dm3 roztworu wodnego o stezeniu 5% H2SO4 i 0,5% KMnC4. Po 15 minutach wyjeto pojemnik z calkowicie odsrebrzonym szklem. Do roztworu potrawiennego o stezeniu srebra 0,75 g/dm3 wprowadzono 1 g chlorku sodu co spowodowalo calkowite wytracenie srebra w postaci AgCl. Osad odfiltrowano, przeplukano woda i wysuszono. Otrzymano 1,08 g produktu w postaci chlorku srebrowego.2 146 473 Zastrzezenie patentowe Sposób odzyskiwania srebra ze zlomu posrebrzanego szkla polegajacy na rozpuszczeniu srebra w kwasie mineralnym i kolejnym wydzieleniu z roztworu potrawiennego, znamienny tym, ze do rozpuszczania srebra stosuje sie rozcienczony wodny roztwór kwasu siarkowego i nadmanga¬ nianu potasu o stezeniu 1 do 10% H2SO4 i 0,1 - 1% KMnC4 w temperaturze otoczenia.Pracownia Poligraficzna UP PRL. Naklad 100 egz.Cena 400 zl PLThe subject of the invention is a method of recovering silver from silver-plated glass scrap. Until now, this silver-bearing secondary raw material has not been processed due to the lack of an appropriate silver recovery technology. The method of recovering silver from silver-plated glass, known from the literature, consists in dissolving silver in nitric acid. Difficult working conditions, high consumption of nitric acid, troublesome utilization of acid etch solutions limit the possibilities of using the known method. The amount of 0.1-1% is separated from the pickling solution, which is separated from the solution and transformed into metallic silver in a known manner, e.g. by cupellation. According to the invention, a scrap of silver-plated glass placed in acid-resistant containers is treated with an aqueous solution with a concentration of 1 - 5% H2SO4 and 0.1 - 0.5% of oxidizing substance KMn04. The digestion process of silver, carried out at a temperature of about 20 ° C, takes 5-20 minutes. The digestion solution can be used many times for digesting silver, which leads to a saving of reagents and higher silver concentrations in the digestive solution. The method of silver recovery according to the invention is surprising for the digestion of silver applied to glass in very dilute solutions. It is known from the technical literature that silver dissolves in nitric acid and in boiling concentrated sulfuric acid, and the dissolution of silver in aqua regia is hindered by the formation of AgCl on the silver surface. Waste photo bleach containing acid, oxidant and soluble silver salts may also be used to dissolve silver from scrap of silver-plated glass. 0.5 kg of silver-plated glass scrap containing 0.05-0.2% Ag was placed in a perforated polyethylene container and immersed in a vessel with 1 liter of water solution with a concentration of 5% H2SO4 and 0.5% KMnC4. After 15 minutes, the container with completely silvered glass was removed. 1 g of sodium chloride was added to the pickle solution with a silver concentration of 0.75 g / dm3, which resulted in complete removal of silver in the form of AgCl. The precipitate was filtered off, rinsed with water and dried. 1.08 g of the product was obtained in the form of silver chloride. 2 146 473 Patent claim A method of recovering silver from scrap of silver-plated glass by dissolving silver in a mineral acid and then separating it from the pickling solution, characterized in that a dilute aqueous acid solution is used to dissolve the silver. potassium sulfur and permanganate with a concentration of 1 to 10% H2SO4 and 0.1-1% KMnC4 at ambient temperature. Printing Workshop of the UP PRL. Mintage 100 copies Price PLN 400 PL
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL25930886A PL146473B1 (en) | 1986-04-30 | 1986-04-30 | Method of recovering silver from silver-plated glass wastes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL25930886A PL146473B1 (en) | 1986-04-30 | 1986-04-30 | Method of recovering silver from silver-plated glass wastes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL146473B1 true PL146473B1 (en) | 1989-02-28 |
Family
ID=20031217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL25930886A PL146473B1 (en) | 1986-04-30 | 1986-04-30 | Method of recovering silver from silver-plated glass wastes |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL146473B1 (en) |
-
1986
- 1986-04-30 PL PL25930886A patent/PL146473B1/en unknown
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