FIELD: metallurgy of non-ferrous and noble metals.
SUBSTANCE: invention relates to methods of producing pure silver. Method comprises chemical dissolution of a silver-containing material in the presence of hydrogen peroxide, separation of insoluble residue and separation of obtained silver solution. Dissolution of the starting material is carried out at pH 9–10 and temperature of 20–30 °C in solution containing 50–150 g/l of ammonium sulphate and 10–50 g/l of hydrogen peroxide.
EFFECT: method enables to exclude release of toxic gases and transition into solution of platinum metals.
1 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF EXTRACTION OF SILVER FROM SLUDGES | 2006 |
|
RU2312911C1 |
| REFINED SILVER PRODUCING METHOD | 2004 |
|
RU2280086C2 |
| METHOD FOR PRODUCING SILVER AND PLATINUM GROUP METALS | 2018 |
|
RU2680552C1 |
| METHOD OF EXTRACTION OF SILVER FROM THE ACID SOLUTION OF SILVER NITRATE BY METHOD OF ELECTROWINNING | 2017 |
|
RU2650372C1 |
| SILVER REFINING METHOD | 2013 |
|
RU2535266C2 |
| PROCESS OF WINNING OF SILVER FROM ITS ALLOYS | 1996 |
|
RU2100484C1 |
| METHOD FOR EXTRACTING PLATINUM AND PALLADIUM FROM SILVER ELECTROLYTES | 2021 |
|
RU2758043C1 |
| METHOD FOR SILVER RECOVERY FROM NITRATE ACTINOID CONTAINING SOLUTIONS (VERSIONS) | 2016 |
|
RU2618874C1 |
| METHOD FOR REGENERATION OF SILVER FROM ACTINOID-CONTAINING NITRIC-ACID SOLUTION | 2020 |
|
RU2753358C2 |
| METHOD FOR EXTRACTING METALS OF PLATINUM GROUP FROM SEDIMENTS AFTER CLARIFYING ACID DISSOLUTION PRODUCT OF VOLOXIDISED SPENT NUCLEAR FUEL | 2016 |
|
RU2632498C2 |
