PL78472B2 - - Google Patents
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- Publication number
- PL78472B2 PL78472B2 PL15813972A PL15813972A PL78472B2 PL 78472 B2 PL78472 B2 PL 78472B2 PL 15813972 A PL15813972 A PL 15813972A PL 15813972 A PL15813972 A PL 15813972A PL 78472 B2 PL78472 B2 PL 78472B2
- Authority
- PL
- Poland
- Prior art keywords
- silver
- weight
- plated
- recovering
- sulfuric acid
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 13
- 239000004332 silver Substances 0.000 claims description 12
- 229910052709 silver Inorganic materials 0.000 claims description 12
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 8
- WGLPBDUCMAPZCE-UHFFFAOYSA-N Trioxochromium Chemical compound O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 5
- 239000011521 glass Substances 0.000 claims description 4
- 241000238557 Decapoda Species 0.000 claims description 3
- JKNZUZCGFROMAZ-UHFFFAOYSA-L [Ag+2].[O-]S([O-])(=O)=O Chemical compound [Ag+2].[O-]S([O-])(=O)=O JKNZUZCGFROMAZ-UHFFFAOYSA-L 0.000 claims description 3
- 239000007864 aqueous solution Substances 0.000 claims description 3
- 229910021607 Silver chloride Inorganic materials 0.000 claims 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 claims 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 10
- 241000191291 Abies alba Species 0.000 description 3
- 238000005034 decoration Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- SQGYOTSLMSWVJD-UHFFFAOYSA-N silver(1+) nitrate Chemical compound [Ag+].[O-]N(=O)=O SQGYOTSLMSWVJD-UHFFFAOYSA-N 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 239000004063 acid-resistant material Substances 0.000 description 1
- 239000004922 lacquer Substances 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910001961 silver nitrate Inorganic materials 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Landscapes
- Chemically Coating (AREA)
Description
Pierwszenstwo: 07.10.1972 (P. 158139) Zgloszenie ogloszono: 01.06.1973 Opis patentowy opublikowano: 10.06.1975 78472 KI. 12n,5/00 MKP C01g 5/00 CIYIELNIA \)ttaóv ^akmtew^^ Twórcy wynalazku: Jerzy Staniewicz, Jerzy Balcer Uprawniony z patentu tymczasowego: Spóldzielnia Pracy „Gedania", Gdansk (Polska) Sposób odzyskiwania srebra ze srebrzonych stluczek szklanych Przedmiotem wynalazku jest sposób odzyskiwania srebra ze srebrzonych stluczek szklanych np. ozdób choinkowych czy wkladów do termosów.Jest mozliwe odzyskiwanie srebra ze srebrzonych stluczek w procesie dzialania stezonym kwasem azotowym w podwyzszonej temperaturze. Sposób ten nie jest stosowany ze wzgledu na duza szkodliwosc powstajacych w procesie tlenków azotu. Ponadto jest procesem bardzo kosztownym ze wzgledu na koniecznosc budowy reaktorów z materialów ognioodpornych i kwasoodpornych.Celem wynalazku jest unikniecie powyzszych wad i opracowanie prostego i skutecznego sposobu odzyski¬ wania srebra ze srebrzonych stluczek.Zgodnie z postawionym zadaniem na srebrzone stluczki umieszczone w pojemniku dzialamy roztworem wodnym zawierajacym 2—10% wagowych kwasu siarkowego i 1—5% wagowych bezwodnika kwasu chromowego w wyniku czego otrzymujemy rozpuszczalny w wodzie siarczan srebra, który w dalszych procesach zostaje przeprowadzony znanymi metodami w srebro metaliczne lub azotan srebra. Niskie stezenie kwasu siarkowego i bezwodnika chromowego powoduje nie przechodzenie do roztworu innych substancji znajdujacych sie na powierzchni stluczek np. lakier na ozdobach choinkowych. Zaleta procesu jest równiez szybki przebieg reakcji w temperaturze pokojowej. Wykorzystanie sposobu wedlug wynalazku pozwoli na ponowne wykorzystanie srebra, które dotychczas bylo wyrzucane w postaci srebrzonych stluczek.Przyklad. Na stluczki srebrzonych ozdób choinkowych dzialano roztworem wodnym zawierajacym 3% wagowych kwasu siarkowego i 1% wagowych bezwodnika kwasu chromowego. Temperatura roztworu wynosila 16°C. Odmycie srebra nastapilo wciagu 12 sekund, przy czym nie zostala naruszona warstwa lakieru znajdujacego sie na powierzchni stluczki. Powstaly w wyniku procesu siarczan srebra przeprowadzono w chlorek przez dzialanie chlorkiem sodu, który nastepnie zredukowano do srebra metalicznego. PL PLPriority: October 7, 1972 (P. 158139) Application announced: June 1, 1973 Patent description was published: June 10, 1975 78472 KI. 12n, 5/00 MKP C01g 5/00 CIYIELNIA \) ttaóv ^ akmtew ^^ Inventors of the invention: Jerzy Staniewicz, Jerzy Balcer Authorized by a temporary patent: Spółdzielnia Pracy "Gedania", Gdansk (Poland) Method of recovering silver from silver-plated glass crabs The subject of the invention There is a method of recovering silver from silver-plated glass cones, e.g. Christmas tree decorations or inserts for thermos flasks. It is possible to recover silver from silver-plated glass cones in the process of treatment with concentrated nitric acid at elevated temperature. This method is not used due to the high harmfulness of nitrogen oxides generated in the process. Moreover, it is a very expensive process due to the necessity to build reactors made of refractory and acid-resistant materials. The aim of the invention is to avoid the above-mentioned drawbacks and to develop a simple and effective method of recovering silver from silver plated crabs. In accordance with the task, the silver-plated cullets placed in the container are operated with an aqueous solution. containing 2-10% by weight sulfuric acid and 1-5% by weight of chromic acid anhydride, the result is water-soluble silver sulphate, which in further processes is converted into metallic silver or silver nitrate by known methods. Low concentration of sulfuric acid and chromic anhydride prevents other substances on the surface of the knuckles from entering the solution, eg varnish on Christmas tree decorations. The process also has the advantage that the reaction takes place quickly at room temperature. The use of the method according to the invention will allow for the reuse of silver, which so far has been thrown away in the form of silver plated key bars. Silvered Christmas tree decorations were treated with an aqueous solution containing 3% by weight of sulfuric acid and 1% by weight of chromic acid anhydride. The solution temperature was 16 ° C. The silver was washed away within 12 seconds, and the lacquer layer on the surface of the knocker was not disturbed. The silver sulphate formed in the process was converted into chloride by treatment with sodium chloride, which was then reduced to metallic silver. PL PL
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL15813972A PL78472B2 (en) | 1972-10-07 | 1972-10-07 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL15813972A PL78472B2 (en) | 1972-10-07 | 1972-10-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PL78472B2 true PL78472B2 (en) | 1975-06-30 |
Family
ID=19960175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL15813972A PL78472B2 (en) | 1972-10-07 | 1972-10-07 |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL78472B2 (en) |
-
1972
- 1972-10-07 PL PL15813972A patent/PL78472B2/pl unknown
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