FIELD: chemistry.
SUBSTANCE: invention relates to the method for selective extraction of gold from aqueous thiocyanate solutions. The method involves sorption on an anionite with subsequent desorption of gold from the anionite. Extraction is done from solutions containing gold in form of a stable complex of Au (I) and metal impurities iron (III), copper (II), zinc (II), silver (I), cobalt (II), and nickel (II). Sorption is done on an AN-251 anionite. Before desorption of gold, the anionite is treated with a 0.005-0.05 M H2SO4 solution in static conditions for desorption and removal metal impurities. Desorption of gold from the anionite is done using a 1-5 M KSCN solution in the presence of 2-10% KOH. The method is environmentally safe.
EFFECT: faster and selective extraction of gold, as well as possibility of complete separation of gold from iron, copper, zinc, nickel, cobalt and silver ions.
2 tbl, 4 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF SEPARATE EXTRACTION OF GOLD AND SILVER FROM SOLUTIONS | 2004 |
|
RU2266342C1 |
| METHOD OF EXTRACTING GOLD FROM COMPOUND CHLORIDE SOLUTIONS | 1992 |
|
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| METHOD OF SEPARATING PLATINUM (II, IV) AND PALLADIUM (II) FROM SILVER (I), IRON (III) AND COPPER (II) IN HYDROCHLORIC ACID SOLUTIONS | 2019 |
|
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| SEPARATE GOLD AND SILVER EXTRACTION METHOD FROM THIOCYANATE SOLUTIONS | 2008 |
|
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| INDICATOR COMPOSITION FOR DETERMINING GOLD(III) IN AQUEOUS SOLUTIONS | 2006 |
|
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| METHOD OF PROCESSING ANTIMONY-BASED GOLD CONTAINING ALLOY | 2006 |
|
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| METHOD OF NOBLE METALS EXTRACTION | 1992 |
|
RU2006506C1 |
| METHOD OF RECOVERY OF GOLD AND/OR SILVER FROM CYANIDE SOLUTIONS AND PULPS | 1999 |
|
RU2148666C1 |
| EXTRACTION METHOD OF GOLD FROM ORES AND PRODUCTS OF THEIR PROCESSING | 2012 |
|
RU2490344C1 |
| METHOD OF EXTRACTION OF METALS | 2006 |
|
RU2312909C1 |
