FIELD: chemistry.
SUBSTANCE: deposition of noble metals is improved by a combination of electroextraction and cementation processes. At the same time, the cathode potential at the electroextraction stage should be negative - 0.6 V relative to the normal hydrogen equivalent in order to ensure the chemical stability of the precipitating material and at the same time to guarantee the cathodic deposition of noble metals.
EFFECT: deposition rate, the degree of extraction, and the content of the final product are increased in comparison with the known methods.
2 cl, 2 tbl, 1 ex
| Title | Year | Author | Number |
|---|---|---|---|
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|
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| SILVER REFINING METHOD | 2013 |
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RU2535266C2 |
| METHOD FOR EXTRACTING PRECIOUS METALS FROM SOLUTIONS BY CEMENTATION | 2021 |
|
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| METHOD OF REMOVING NOBLE METALS FROM CYANIDE SOLUTIONS | 2016 |
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| PROCEDURE FOR TREATMENT OF ZINC CONTAINING GOLD-SILVER AND/OR SILVER-GOLD CAKES WITH EXTRACTION OF VALUABLE COMPONENTS | 2010 |
|
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| METHOD OF RECOVERING METALS FROM SCRAP | 1996 |
|
RU2097438C1 |
| METHOD OF RECOVERY OF NOBLE METALS FROM SOLUTION | 2000 |
|
RU2164554C1 |
