RO83026B1 - Process for separating palladium and silver from serigraphic plates - Google Patents
Process for separating palladium and silver from serigraphic platesInfo
- Publication number
- RO83026B1 RO83026B1 RO105025A RO10502581A RO83026B1 RO 83026 B1 RO83026 B1 RO 83026B1 RO 105025 A RO105025 A RO 105025A RO 10502581 A RO10502581 A RO 10502581A RO 83026 B1 RO83026 B1 RO 83026B1
- Authority
- RO
- Romania
- Prior art keywords
- serigraphic
- plates
- precipitation
- evaporation
- hydrochloric acid
- Prior art date
Links
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 title abstract 10
- 229910052763 palladium Inorganic materials 0.000 title abstract 6
- 229910052709 silver Inorganic materials 0.000 title abstract 5
- 238000000034 method Methods 0.000 title abstract 2
- 239000004332 silver Substances 0.000 title 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 abstract 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract 2
- 239000007864 aqueous solution Substances 0.000 abstract 2
- 238000001704 evaporation Methods 0.000 abstract 2
- 230000008020 evaporation Effects 0.000 abstract 2
- 238000001556 precipitation Methods 0.000 abstract 2
- 239000000243 solution Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 abstract 1
- 101150003085 Pdcl gene Proteins 0.000 abstract 1
- 229910021607 Silver chloride Inorganic materials 0.000 abstract 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 1
- 239000002253 acid Substances 0.000 abstract 1
- 230000002378 acidificating effect Effects 0.000 abstract 1
- 229910021529 ammonia Inorganic materials 0.000 abstract 1
- 150000001805 chlorine compounds Chemical class 0.000 abstract 1
- 238000010668 complexation reaction Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 229910017604 nitric acid Inorganic materials 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- HKZLPVFGJNLROG-UHFFFAOYSA-M silver monochloride Chemical compound [Cl-].[Ag+] HKZLPVFGJNLROG-UHFFFAOYSA-M 0.000 abstract 1
- 235000011149 sulphuric acid Nutrition 0.000 abstract 1
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
Procedeul de separare a Pd si Ag de pe placute serigrafice, în care continutul de Ag este cuprins între 1,3 si 1,8% de Pd între 0,35 si 0,4% iar raportul între Pd si Ag variaza între 1:3,5 si 1:9,5 conform inventiei, prin atac acid cu amestec de H2SO4 si HNO3 si la cald, avaporare, reluare cu apa si tratrarea solutiei obtinute HCl cu 1:1 pentru precipitarea Ag sub forma de AgCl si trecerea Pd sub forma de PdCl care se separa în continuare prin complexare cu amoniac concentrat în exces si precipitare cu acid clorhidric sub forma de clorura diamonopaladoasa ce poate fi utilizata ca atare sau redusa în continuare în curent de H2 la 800...900 degree C pentru obtinerea paladiului metalic, în scopul optimizarii fluxului tehnologic si obtinerii unor randamente ridicate de separare a Pd si Ag, prevede încalzirea timp de o ora a solutiei apoase obtinute dupa evaporarea si reluarea cu apa a solutiei acide initiale dupa care Ag si Pd continuti în solutie apoasa ce trec în vederea separarii în forma de cloruri prin tratrae cu acid clorhidric în conditii uzuale.The process of separating Pd and Ag from serigraphic plates, wherein the Ag content is between 1.3 and 1.8% of Pd between 0.35 and 0.4% and the ratio between Pd and Ag varies between 1: 3 , 5 and 1: 9.5 according to the invention, by acidic attack with a mixture of H2SO4 and HNO3 and hot, evaporation, reversing with water and treating the obtained HCl solution with 1: 1 for Ag precipitation in the form of AgCl and passing the Pd in the form of PdCl which is further separated by complexation with excess concentrated ammonia and precipitation with hydrochloric acid in the form of diamonopaladate chloride which can be used as such or further reduced in H2 stream at 800 ... 900 ° C to obtain metal palladium , in order to optimize the technological flow and to obtain high yields of Pd and Ag separation, provides for an hour heating of the aqueous solution obtained after the evaporation and the water resumption of the initial acid solution, after which Ag and Pd continue in the aqueous solution passing in view sep in the form of chlorides, by treatment with hydrochloric acid under conventional conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO105025A RO83026B1 (en) | 1981-08-01 | 1981-08-01 | Process for separating palladium and silver from serigraphic plates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| RO105025A RO83026B1 (en) | 1981-08-01 | 1981-08-01 | Process for separating palladium and silver from serigraphic plates |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| RO83026A2 RO83026A2 (en) | 1984-01-14 |
| RO83026B1 true RO83026B1 (en) | 1984-01-30 |
Family
ID=20110300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| RO105025A RO83026B1 (en) | 1981-08-01 | 1981-08-01 | Process for separating palladium and silver from serigraphic plates |
Country Status (1)
| Country | Link |
|---|---|
| RO (1) | RO83026B1 (en) |
-
1981
- 1981-08-01 RO RO105025A patent/RO83026B1/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| RO83026A2 (en) | 1984-01-14 |
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